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Dividing Daylilies

8/18/2017

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Picture
Daylilies need to be divided every three to four years to maintain vigor. Though they may be divided in early spring before growth starts, it is more common to divide them at this time of year.  Many gardeners cut back the tops to about half their original height to make plants easier to  handle.

Daylilies have a very tough root system that can make them difficult to divide while in place.  Dividing in place is practical if it hasn’t been long since the last division. In such cases, a spading fork can be used to peel fans from the existing clump. If the plants have been in place longer and are well grown together, it is more practical to divide them after the entire clump has been dug.
Use a spade to lift the entire clump out of the ground. Although it is possible to cut the clump apart with a sharp spade, you'll save more roots by using two spading forks back-to-back to divide the clump into sections. Each section should be about the size of a head of cauliflower.  An easier method involves using a stream of water from a garden hose to wash the soil from the clump, and then rolling the clump back and forth until the individual divisions separate.  
​
Space divisions 24 to 30 inches apart, and set each at its original depth. The number of flowers will be reduced the first year after division but will return to normal until the plants need to be
divided again. (Ward Upham)

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Horticulture Newsletter 2016, No. 34

8/23/2016

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Turfgrass:
Give Cool-Season Grasses a Boost

Picture
​September is almost here and that means it is prime time to fertilize your tall fescue or Kentucky bluegrass lawns. If you could only fertilize your cool-season grasses once per year, this would be the best time to do it.
        
These grasses are entering their fall growth cycle as days shorten and temperatures moderate (especially at night). Cool-season grasses naturally thicken up in the fall by tillering (forming new shoots at the base of existing plants) and, for bluegrass, spreading by underground stems called rhizomes. Consequently, September is the most important time to fertilize these grasses.
        
Apply 1 to 1.5 pounds of actual nitrogen per 1,000 square feet. The settings recommended on lawn fertilizer bags usually result in about 1 pound of nitrogen per 1,000 square feet. We recommend a quick-release source of nitrogen at this time. Most fertilizers sold in garden centers and department stores contain either quick-release nitrogen or a mixture of quick- and slow-release. Usually only lawn fertilizers recommended for summer use contain slow-release nitrogen. Any of the others should be quick-release.
        
The second most important fertilization of cool-season grasses also occurs during the fall. A November fertilizer application will help the grass green up earlier next spring and provide the nutrients needed until summer. It also should be quick-release applied at the rate of 1-pound actual nitrogen per 1,000 square feet. (Ward Upham) 

Vegetables:
Common Smut on Sweet Corn

smut on sweet corn
​Smut (Ustilago maydis) is a fungal disease of corn that may infect leaves, stems, tassels or ears though infections on ears are the most obvious.  Immature galls are white and spongy but become brown with dark powdery spores with maturity.  Leaf galls remain small but those on the ears or stems can become rather large and will release large numbers of spores when they rupture. This disease is likely to be most severe on plants injured by hail, cultivation or insects and tends to be worse on soils that have had heavy applications of nitrogen fertilizer or manure. Also anything that slows growth such as hot, dry weather or cool, wet weather when the plants are young can result in more infections.
        
Immature smut galls are considered an edible delicacy known as cuitlacoche in Mexico. They are a high value crop for some growers in the northeast U.S. who sell them to Mexican restaurants.
        
There is no chemical control for this disease. Crop rotation and a balanced fertilizer program can help minimize this disease. Remove and destroy galls from infected plants before they rupture. (Ward Upham)

Flowers:
Dividing Daylilies

Picture
Daylilies need to be divided every three to four years to maintain vigor. Though they may be divided in early spring before growth starts, it is more common to divide them at this time of year. Many gardeners cut back the tops to about half their original height to make plants easier to  handle.
        
Daylilies have a very tough root system that can make them difficult to divide while in place. Dividing in place is practical if it hasn’t been long since the last division. In such cases, a spading fork can be used to peel fans from the existing clump. If the plants have been in place longer and are well grown together, it is more practical to divide them after the entire clump has been dug.
        
Use a spade to lift the entire clump out of the ground. Although it is possible to cut the clump apart with a sharp spade, you'll save more roots by using two spading forks back-to-back to divide the clump into sections. Each section should be about the size of a head of cauliflower. An easier method involves using a stream of water from a garden hose to wash the soil from the clump, and then rolling the clump back and forth until the individual divisions separate. Space divisions 24 to 30 inches apart, and set each at its original depth. The number of flowers will be reduced the first year after division but will return to normal until the plants need to be
divided again. (Ward Upham)

Pests:
Likely Too Late to Spray for Bagworms

bagworms
Bagworms can cause a great deal of damage during the last few weeks of feeding, and gardeners may be tempted to spray for them now. But late-August sprays are often totally ineffective because the insects have usually stopped feeding.  Never spray in August unless the insects are actively feeding.  Handpicking is still possible if there are not so many bags it becomes impractical. Understanding the life cycle of this moth will explain why spraying now is not recommended and help plan effective control measures.
        
In Kansas, bagworms normally finish feeding and close their bags during mid-August. After that, insecticides are ineffective because they cannot reach the pest.
        
Bagworms are unusual because they use an uncommon form of reproduction called paedogenesis in which the female larva reproduces. The female larva never pupates, but produces mature sexual organs during the last larval instar. She releases a sex hormone that attracts the male who does pupate and emerges as a flying moth. The male flies to the female's bag and mates with her while she remains in the bag. After mating, the female's body fills with eggs. She will eventually die inside the bag, and her body will become a dried, mummified egg case that will protect the eggs during the winter. Each female case normally contains 300 to 1,000 eggs. Egg hatch does not occur until the next spring, usually around the end of May in Kansas.
        
Insecticide sprays are more likely to be effective when the bagworms are small. Even Bacillus thuringiensis (Dipel, Thuricide) can be effective on young bagworms. Another organic product, spinosad (Captain Jack’s Deadbug Brew; Fertilome Borer, Bagworm, Leafminer and Tent Caterpillar Spray; Monterey Garden Insect Spray), is very effective against both young and more mature bagworms. Other commonly used pesticides include acephate, cyfluthrin, permethrin, malathion and Sevin.
        
During most years, spraying about June 15 will provide good control. Don't forget that insecticides are not the only means of control. Hand picking and destroying the bags is effective any time when the bags are large enough to be picked. (Ward Upham)

Mycosphaerella Leaf Spot on Ash

Mycosphaerella Leaf Spot on ash
With all the concern about Emerald Ash Borer (EAB), many people may assume that any ash tree with problems is being attacked by EAB. However, EAB has only been confirmed in Douglas, Jefferson, Johnson, Leavenworth and Wyandotte counties.  One of the other problems we see with ash is Mycosphaerella Leafspot. Though this disease looks serious, it is not.
 
Mycosphaerella leaf spot causes small, brown spots that enlarge to become blotches and may result in early leaf drop. Defoliation this late in the growing season will not hurt the health of the tree. Therefore, because this disease appears sporadically and tree health is not harmed, we do not recommend treatment. Furthermore, treatment would have to be preventative and applied before the disease had infected the leaves. Applying a fungicide now would have no effect. (Ward Upham)

Miscellaneous:
Are Crabapples Safe to Eat?

crabapples
Crabapples are safe to consume as long as you don’t eat too many of them. Actually, the only difference between crabapples and apples is the size of the fruit. By definition, crabapples have fruit that are 2 inches or less in diameter, and apples are more than 2 inches in diameter. By this definition, most of the apples grown from seed will be crabapples. The fruiting apples are grafted.
        
So, did people ever plant crabapples from seed? Of course they did. Just think of Johnny Appleseed. But those apples were normally used for jelly, applesauce, and cider and not for fresh eating.
        
There is one other caveat with using crabapples from a tree in the landscape. Make sure the tree hasn't been sprayed as an ornamental with a pesticide that isn't labeled for fruit tree apples. If it has, then the fruit should not be used. (Ward Upham)
                                   
Contributors: Ward Upham, Extension Associate

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Horticulture Newsletter 2015, No. 33

8/18/2015

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Video of the Week:
Storing and Preserving Peppers

Turfgrass:
Give Cool-Season Grasses a Boost

fertilizing lawn
September is almost here and that means it is prime time to fertilize your tall fescue or Kentucky bluegrass lawns. If you could only fertilize your cool-season grasses once per year, this would be the best time to do it.

These grasses are entering their fall growth cycle as days shorten and temperatures moderate (especially at night). Cool-season grasses naturally thicken up in the fall by tillering (forming new shoots at the base of existing plants) and, for bluegrass, spreading by underground stems called rhizomes. Consequently, September is the most important time to fertilize these grasses.

Apply 1 to 1.5 pounds of actual nitrogen per 1,000 square feet. The settings recommended on lawn fertilizer bags usually result in about 1 pound of nitrogen per 1,000 square feet. We recommend a quick-release source of nitrogen at this time. Most fertilizers sold in garden centers and department stores contain either quick-release nitrogen or a mixture of quick- and slow-release. Usually only lawn fertilizers recommended for summer use contain slow-release nitrogen. Any of the others should be quick-release.

The second most important fertilization of cool-season grasses also occurs during the fall. A November fertilizer application will help the grass green up earlier next spring and provide the nutrients needed until summer. It also should be quick-release applied at the rate of 1-pound actual nitrogen per 1,000 square feet. (Ward Upham)

Ornamentals:
Trees Losing Bark and Dying

tree losing bark
Some trees such as sycamore, silver maple and redbuds naturally lose the outer layer of bark, especially during years of good growth. This is a natural process and is not a cause for concern.

However, this year, we are seeing a wide variety of trees losing more than just the outer layer of bark and then dying quickly. I think what is happening is all related to the November freeze last fall. In this area of Kansas, we went from 69 degrees on November 10 to 19 degrees the following morning. Unfortunately, many trees had not hardened off yet and were damaged. The first sign of damage was marcescence where trees that normally drop their leaves in the fall, didn’t. Leaves didn’t drop because they didn’t have enough time to develop an abscission layer at the base of each leaf that allowed it to fall. Though marcescence itself does not harm the tree, it is a clue that further damage may have occurred.

So, what happened? I think this is all related to damage to the living tissue under the bark. The sharp drop in temperature killed at least a portion the phloem and the cambium. Remember the phloem carries food made in the leaves to all parts of the plants including the roots. The cambium produces new phloem as well as xylem. Xylem will be discussed later. Now that the phloem is dead and the cambium cannot produce new, living phloem, the roots don’t receive the food needed to survive and eventually starve to death.

Why didn’t these trees die immediately? First of all, a healthy root system has stored energy reserves that it can use to keep the tree alive. When those reserves are depleted, the tree dies very quickly.

However, a tree also needs water. Since the living portion of the trunk was killed, wouldn’t this stop water flow? Actually, it would not. The reason it would not is due to how a tree grows and, specifically, how xylem works. Xylem is the structure that carries water from the roots to the top portions of the plant. Even in perfectly healthy trees, most of the xylem is dead. This dead xylem forms hollow tubes that carry the vast majority of water and nutrients throughout the plant. Though there are living xylem cells, the contents of those cells make them inefficient in
moving water. Therefore, the functional portion of the xylem wasn’t hurt by the freeze because it was already dead. Since this xylem system still works, the tree can live for quite a period of time until the roots starve.

Does that mean a tree with cracking or lost bark will die? It all depends on how much of the living tissue under the bark was killed. If only a small portion was killed then the tree may recover. If the entire circumference was killed, it is done for and there isn’t anything you can do to save it. Any portion of the trunk where the bark comes off and the underlying layer is brown is dead.

If you are unsure how much of the trunk was damaged, continue to water the tree as needed until the twigs become brittle. If the twigs become brittle, the tree is dead. (Ward Upham)

Fruit:
Pear Harvest

corking over of pear lenticels
Pears should not be allowed to ripen on the tree. They should be picked while still firm and ripened after harvest. Tree-ripened fruits are often of poor quality because of the development of grit cells and the browning and softening of the inner flesh. Commercial growers determine the best time to harvest pears by measuring the decrease in fruit firmness as the fruit matures. This varies with growing conditions and variety. A Magness meter is used for testing and measures the pressure needed to push a 5/16-inch tip a specified distance into an individual fruit. Home gardeners can use these other indicators:

1. A change in the fruit ground color from a dark green to light green or yellowish green. The ground color is the "background" color of the fruit.

2. Fruit should part easily from the branch when it is lifted up and twisted.

3. Corking over of lenticels. Lenticels are the "breathing pores" of the fruit. They start out as a white to greenish white color and turn brown due to corking as the fruit nears maturity. They look like brown “specks” on the fruit.

4. Development of characteristic pear aroma and taste of sampled fruit.

Pears ripen in one to three weeks after harvest if held at 60 to 65 degrees F. They can then be canned or preserved. If you wish to store some for ripening later, fresh-picked fruit should be placed in cold storage at 29 to 31degrees F and 90 percent humidity. Ripen small amounts as needed by moving them to a warmer location and holding them at 60 to 65 degrees F. Storing at too high a temperature (75 degrees F and higher) will result in the fruit breaking down without ripening. (Ward Upham)

Vegetables:
Harvesting Winter Squash

butternut squash
Summer squash such as zucchini and scallop are harvested while immature but winter squash such as acorn, hubbard and butternut are harvested later, in the mature stage, after the rind is tough and seeds have developed. We normally think September is the time that winter squash are harvested. Harvesting too early leads to fruit that
shrivels and rots.

There are two main characteristics that help tell us when winter squash are mature: color and rind toughness.

Winter squash change color as they become mature. Butternut changes from light beige to deep tan. Acorn is a deep green color but has a ground spot that changes from yellow to orange when ripe. Gray or orange is the mature color for hubbard.

A hard, tough rind is another characteristic of mature winter squash. This is easily checked by trying to puncture the rind with your thumbnail or fingernail. If it easily penetrates the skin, the squash is not yet mature and will lose water through the skin -- causing the fruit to dry and shrivel. Also, immature fruit will be of low quality. The stem should also be dry enough that excessive water doesn’t drip from the stem.

Winter squash should be stored cool with elevated humidity. Ideal conditions would be 55 to 60 degrees F and 50 to 70 percent relative humidity. Under such conditions, acorn squash will usually last about 5 to 8 weeks, butternuts 2 to 3 months and hubbards 5 to 6 months. (Ward Upham)

Flowers:
Dividing Daylilies

daylily division
Daylilies need to be divided every three to four years to maintain vigor. Though they may be divided in early spring before growth starts, it is more common to divide them at this time of year. Many gardeners cut back the tops to about half their original height to make plants easier to handle.

Daylilies have a very tough root system that can make them difficult to divide while in place. Dividing in place is practical if it hasn’t been long since the last division. In such cases, a spading fork can be used to peel fans from the existing clump. If the plants have been in place longer and are well grown together, it is more practical to divide them after the entire clump has been dug.

Use a spade to lift the entire clump out of the ground. Although it is possible to cut the clump apart with a sharp spade, you'll save more roots by using two spading forks back-to-back to divide the clump into sections. Each section should be about the size of a head of cauliflower. An easier method involves using a stream of water from a garden hose to wash the soil from the clump, and then rolling the clump back and forth until the individual divisions separate.

Space divisions 24 to 30 inches apart, and set each at its original depth. The number of flowers will be reduced the first year after division but will return to normal until the plants need to be divided again. (Ward Upham)

Pests:
Uninvited Guests - Crickets

cricket
Crickets subsist on a wide range of food sources. As generalist omnivores, they are opportunistic feeders deriving nourishment wherever on whatever is available including plant, dead organic plant and animal matter, algal, fungal and bacterial sources.

The mere presence of crickets can be annoying. In addition, while the chirping of male insects may be considered beautiful music-in-the-night out-of-doors, indoors it may be regarded as noisy and disruptive. Although not bona fide fabric pests, being what they are (insects with chewing mouthparts) and doing what many insects do (test/taste-their-surroundings), crickets may be responsible for creating holes in and leaving stains on light-colored fabrics (curtains/sheers the oft-cited areas showing damage).

The crickets which enter homes will likely be “field crickets.” Mature field crickets approach an inch in length. The female, is easily identifiable by the presence of her prominent ovipositor measuring another ¾-inch. Most field crickets are all black in color, but some may have a lighter appearance due to their coppery colored wings.

Field crickets overwinter as eggs deposited in the soil. Currently, field crickets are now in their mid-development stages, and for the most part, go unnoticed. By the time cooler fall weather moves in, field crickets will have reached their adult stages. Before and after mating and depositing eggs, crickets move toward sources of heat such as homes and buildings whose exteriors “soak up” the sunlight. Crickets are capable of detecting heat gradients and thus are
drawn in. Once on-the-doorstep, they are a hop away from secretly moving in through any available opening.

How does one go about attempting to prevent cricket “visitors” in homes and possibly business establishments? When cricket populations are large and there is the likelihood of impending invasions, reduction of their numbers may be achieved with insecticide applications as barrier treatments applied to a 6- to12-foot band around the perimeters of homes and businesses.

Once inside, insecticides registered for indoor use against crickets or (in general) indoor invasive species can be applied per labeled instructions. Indoor applications may be general surface, spot, mist or crack and crevice treatments.

Perhaps a more successful approach for preventing cricket “guests” is to exclude them! Again, as previously mentioned, crickets gain entrance via any available crack/crevice/hole/gap. Thus, sealing these portals of entry is a recommended method of exclusion. Attempt to insect-proof houses and buildings by thoroughly inspecting and identifying entry points. Check for cracks and gaps in structure foundations, ill-fitting doorways and garage doors, overhang louvers, chimney vents, roof ducts, soffits, air conditioner connections, outdoor faucets and siding. Use caulk to seal cracks and crevices, weather stripping to make doorways and garage doors tightfitting, and metal screening over/under/behind other entry points. Such simple words. Yet, in all practicality when looking at my home (which I consider sound-and-sealed), I know that there are still remaining untended access points. I expect that like many other people, I will have “fall visitors.” Sort of a fact-of-life that one must accept. (Bob Bauernfeind)

Miscellaneous:
Ornamental Tree Evaluation Guide Update Available

The updated ornamental tree evaluation guide is now available on our website here. The guide is a tool to help determine the value of a tree or trees. The appraisal uses the trunk formula method and is used in consultation with a trained professional to determine size, condition rating and location rating. A listing of relative tree values by species and location within the state is factored into the formula. (Ward Upham)

Contributors: Bob Bauernfeind, Entomologist; Ward Upham, Extension Associate
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Horticulture Newsletter 2014, No. 33

8/19/2014

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Video of the Week:
Grow Your Own Salad Mix

Turfgrass:
Overseeding a Lawn

Picture
Tall fescue lawns that have become thin over the summer can be thickened up by overseeding during September. Start by mowing the grass short (1 to 1.5 inches) and removing the clippings. This will make it easier to achieve good seed-soil contact and increase the amount of light that will reach the young seedlings.

Good seed-soil contact is vital if the overseeding is to be successful. Excess thatch can prevent seed from reaching the soil and germinating. Normally we want 1/4 inch of thatch or less when overseeding. If the thatch layer is 3/4 inch or more, it is usually easiest to use a sod cutter to remove it and start over with a new lawn. A power rake can be used to reduce a thatch layer that is less than 3/4 inch but more than a quarter inch.        

Once thatch is under control, the soil should be prepared for the seed. This can be done in various ways. A verticut machine has solid vertical blades that can be set to cut furrows in the soil. It is best to go two different directions with the machine. A slit seeder is a verticut machine with a seed hopper added so the soil prep and seeding operation are combined. A third option is to use a core aerator.

The core aerator will punch holes in the soil and deposit the soil cores on the surface of the ground. Each hole produces an excellent environment for seed germination and growth. Make three to four passes with the core aerator to insure enough holes for the seed. Using a core aerator has the additional benefit of reducing the amount of watering needed to get the seed germinated and growing. Aeration also increases the water infiltration rate, decreases compaction, and increases the amount of oxygen in the soil. Fertilizer should then be applied at the rate suggested by a soil test, or a starter fertilizer should be used at the rate suggested on the bag.  (Ward Upham)

Fall Lawn Seeding Tips

Picture
The keys to successful lawn seeding are proper rates, even dispersal, good seed to soil contact, and proper watering. Evenness is best achieved by carefully calibrating the seeder or by adjusting the seeder to a low setting and making several passes to ensure even distribution. Seeding a little on the heavy side with close overlapping is better than missing areas altogether, especially for the bunch-type tall fescue, which does not spread.  Multiple seeder passes in opposite directions should help avoid this problem.

A more serious error in seeding is using the improper rate. For tall fescue, aim for 6 to 8 pounds of seed per 1,000 square feet for new areas and about half as much for overseeding or seeding areas in the shade. Using too much seed results in a lawn more prone to disease and damage from stress. The best way to avoid such a mistake is to determine the square footage of the yard first, and then calculate the amount of seed. Using too little seed can also be detrimental and result in clumpy turf that is not as visually pleasing.

Establishing good seed to soil contact is essential for good germination rates. Slit seeders achieve good contact at the time of seeding by dropping seed directly behind the blade that slices a furrow into the soil. Packing wheels then follow to close the furrow. The same result can be accomplished by using a verticut before broadcasting the seed, and then verticutting a second time.

Core aerators can also be used to seed grass. Go over an area at least three times in different directions, and then broadcast the seed. Germination will occur in the aeration holes. Because those holes stay moister than a traditional seedbed, this method requires less watering.  If seeding worked soil, use light hand raking to mix the seed into the soil. A leaf rake often works better than a garden rake because it mixes seed more shallowly.

Water newly planted areas lightly, but often. Keep soil constantly moist but not waterlogged.  During hot days, a new lawn may need to be watered three times a day. If watered less, germination will be slowed. Cool, calm days may require watering only every couple of days. As the grass plants come up, gradually decrease watering to once a week if there is no rain. Let the plants tell you when to water. If you can push the blades down and they don't spring back up quickly, the lawn needs water. Once seed sprouts, try to minimize how much traffic (foot, mower, dog, etc.) seeded areas receive until the seedlings are a little more robust and ready to be mowed. Begin mowing once seedlings reach 3 to 4 inches tall. (Ward Upham)

Flowers:
Dividing Daylilies

Picture
Daylilies need to be divided every three to four years to maintain vigor. Though they may be divided in early spring before growth starts, it is more common to divide them at this time of year. Many gardeners cut back the tops to about half their original height to make plants easier to handle.

Daylilies have a very tough root system that can make them difficult to divide while in place.   Dividing in place is practical if it hasn’t been long since the last division. In such cases, a spading fork can be used to peel fans from the existing clump. If the plants have been in place longer and are well grown together, it is more practical to divide them after the entire clump has been dug.

Use a spade to lift the entire clump out of the ground. Although it is possible to cut the clump apart with a sharp spade, you'll save more roots by using two spading forks back-to-back to divide the clump into sections. Each section should be about the size of a head of cauliflower. An easier method involves using a stream of water from a garden hose to wash the soil from the clump, and then rolling the clump back and forth until the individual divisions separate.

Space divisions 24 to 30 inches apart, and set each at its original depth. The number of flowers will be reduced the first year after division but will return to normal until the plants need to be divided again. (Ward Upham)

Fruit:
Pear Harvest

Picture
Pears should not be allowed to ripen on the tree.  They should be picked while still firm and ripened after harvest. Tree-ripened fruits are often of poor quality because of the development of grit cells and the browning and softening of the inner flesh. Commercial growers determine the best time to harvest pears by measuring the decrease in fruit firmness as the fruit matures. This varies with growing conditions and variety. A Magness meter is used for testing and measures the pressure needed to push a 5/16-inch tip a specified distance into an individual fruit. Home gardeners can use these other indicators:       

1. A change in the fruit ground color from a dark green to light green or yellowish green. The ground color is the "background" color of the fruit.

2. Fruit should part easily from the branch when it is lifted up and twisted.

3. Corking over of lenticels. Lenticels are the "breathing pores" of the fruit. They start out as a white to greenish white color and turn brown due to corking as the fruit nears maturity. They look like brown “specks” on the fruit.

4. Development of characteristic pear aroma and taste of sampled fruit.

Pears ripen in one to three weeks after harvest if held at 60 to 65 degrees F. They can then be canned or preserved. If you wish to store some for ripening later, fresh-picked fruit should be placed in cold storage at 29 to 31degrees F and 90 percent humidity. Ripen small amounts as needed by moving them to a warmer location and holding them at 60 to 65 degrees F. Storing at too high a temperature (75 degrees F and higher) will result in the fruit breaking down without
ripening. (Ward Upham)

Vegetables:
Harvesting Winter Squash

Picture
Summer squash such as zucchini and scallop are harvested while immature but winter squash such as acorn, hubbard and butternut are harvested later, in the mature stage, after the rind is tough and seeds have developed. We normally think September is the time that winter squash are harvested.  Harvesting too early leads to fruit that shrivels and rots.

There are two main characteristics that help tell us when winter squash are mature: color and rind toughness.

Winter squash change color as they become mature. Butternut changes from light beige to deep tan. Acorn is a deep green color but has a ground spot that changes from yellow to orange when ripe. Gray or orange is the mature color for hubbard.

Hard, tough rinds is another characteristic of mature winter squash. This is easily checked by trying to puncture the rind with your thumbnail or fingernail. If it easily penetrates the skin, the squash is not yet mature and will lose water through the skin -- causing the fruit to dry and shrivel. Also, immature fruit will be of low quality. The stem should also be dry enough that excessive water doesn’t drip from the stem.

Winter squash should be stored cool with elevated humidity. Ideal conditions would be 55 to 60 degrees F and 50 to 70 percent relative humidity. Under such conditions, acorn squash will usually last about 5 to 8 weeks, butternuts 2 to 3 months and hubbards 5 to 6 months. (Ward Upham)

Common Smut on Sweet Corn

Picture
Smut (Ustilago maydis) is a fungal disease of corn that may infect leaves, stems, tassels or ears though infections on ears are the most obvious. Immature galls are white and spongy but become brown with dark powdery spores with maturity. Leaf galls remain small but those on the ears or stems can become rather large and will release large numbers of spores when they rupture. This disease is likely to be most severe on plants injured by hail, cultivation or insects and tends to be worse on soils that have had heavy applications of nitrogen fertilizer or manure. Also anything that slows growth such as hot, dry weather or cool, wet weather when the plants are young can result in more infections.

Immature smut galls are considered an edible delicacy known as cuitlacoche in Mexico. They are a high value crop for some growers in the northeast U.S. who sell them to Mexican restaurants.

There is no chemical control for this disease. Crop rotation and a balanced fertilizer program can help minimize this disease. Remove and destroy galls from infected plants before they rupture. (Ward Upham)

Miscellaneous:
Pokeweed

Picture
A number of people have asked the name of the weed with the large leaves and purple-black berries that hang in a cluster. This perennial is known as pokeweed. All parts of this plant are poisonous, especially the roots. Signs of poisoning include abdominal cramps, diarrhea, vomiting, weakness, drowsiness and difficulty in breathing. One of the toxins found in pokeweed is the protein lectin, which can cause abnormalities in white blood cells.

Surprisingly, young leafy springtime shoots are sometimes eaten after thorough cooking. Though cooking eliminates most of the toxins, there is still a danger of being poisoned from handling and preparing the shoots as well as ingesting improperly cooked plants.

Berries can be attractive to children. Cut down and discard pokeweed that might come into contact with kids. This plant is a perennial. You may want to spray it with a herbicide next year before it is large enough to be attractive to children. (Ward Upham)

Contributors:  Ward Upham, Extension Associate

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    Authors

    Ward Upham runs the Horticulture Response Center in the Department of Horticulture and Natural Resources at Kansas State University. Other contributors include K-State Extension Specialists.

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