Category: Wild Violet Control

Turfgrass: Controlling Wild Violets in Lawns

4/11/2017

One of the most difficult weeds to control in lawns is the wild violet. Even combination products that contain 2,4-D, MCPP and Dicamba such as Trimec, Weed-Out and most formulations of Weed-B-Gon do not do a good job. Products with triclopyr give much better control though more than one treatment will likely be needed. A couple of products that contain triclopyr on the homeowner side are Turflon Ester and Weed-B-Gon Chickweed, Clover & Oxalis. (Note: There are several formulations of Weed-B-Gon but only Weed-B-Gon Chickweed, Clover & Oxalis contains triclopyr.)

Both products listed above are labeled for tall fescue and Kentucky bluegrass. Do not use products containing triclopyr on bermudagrass as severe injury will occur. Weed-B-Gon Chickweed Clover & Oxalis is labeled for buffalograss and zoysia (Turflon Ester is not) but lawns will likely show some temporary browning after application.

Spray only on calm days and when temperatures are below 90 degrees to avoid damage to nearby plants. (Ward Upham)

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Horticulture Newsletter 2016, No. 15

4/12/2016

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Video of the Week:
Butterfly Gardens

Fruit:
Fertilizing Blueberries

Blueberries are sensitive to excess levels of fertilizer. Do not go over the recommended amount.

Year of Planting: Apply fertilizer according to soil test and work into the soil before planting. Every six weeks thereafter apply a high nitrogen fertilizer such as a 27-3-3, 29-5-4, 30-3-3 or something similar. Though recommended for lawns, these fertilizers will also work well for blueberries as long as they do not contain weed killers or crabgrass preventers. Apply 1 teaspoon per plant within a circle within 12 inches of the plant. Do not apply fertilizer past August 15. Urea (46-0-0) may be substituted for the fertilizer recommended above but cut the amount to a rounded ½ teaspoon per plant.

Second Year: Double the rates recommended above and increase the area treated to within 18 inches of the plant. Apply the first application when the new growth appears in the spring and continue every six weeks but not after August 15.

Third Year and Following: Apply 1/3 cup of the fertilizer recommended above within three feet of each plant when growth begins in the spring. Bushes should produce 6 to 12 inches of new growth each year. If less than this is produced or if you wish larger plants, apply 1/4 cup of fertilizer every 6 weeks. Do not apply fertilizer after August 15. (Ward Upham)

Controlling Weeds in Strawberries

Strawberries are one of the most popular fruits, but gardeners often have problems with weed control. Strawberries form a mat of plants, which makes hoeing difficult. Gardeners must pull weeds by hand or use herbicides. In small plantings, hand weeding is usually sufficient as weeds become less of a problem when the plants canopy over to block sunlight to the soil. In larger plantings, herbicides may prove helpful.

Although there are no weed preventers available for homeowners to use on strawberries, Poast (sethoxydim), a grass-killing herbicide, can be used after weedy grasses have emerged. It can be sprayed directly over strawberries without harm but should not be applied within 7 days of harvest. You can find Poast in Fertilome Over the Top II, Hi-Yield Grass Killer and Monterey Grass Getter. (Ward Upham)

Vegetables:
Help for New Vegetable Gardeners

Kansans that are new to vegetable gardening often don’t know how much of each crop to plant. K-State Research and Extension has a publication that can help. The “Vegetable Garden Planning Guide” gives information on the size of planting needed per person and the average crop expected per 100 feet. Also included is a garden calendar highlighting suggested planting dates and expected harvest dates. Crop specific information is detailed including days to germinate, plants or seeds needed per 100 feet of row, depth of planting, spacing within the row and spacing between rows. You can find the publication at your local county extension office or online at: http://www.ksre.ksu.edu/bookstore/pubs/mf315.pdf

Another, more in-depth publication titled the “Kansas Garden Guide” is also available. This 77-page booklet has sections on planning a garden, composting, improving soil, seeding and planting, garden care, watering, planting gardens for fall production, insect and disease control, container gardening, season extension and harvesting and storing. This is followed by an extensive section on how to grow specific vegetables and herbs. You may order the print publication at http://www.ksre.ksu.edu/bookstore/Item.aspx?catId=534&pubId=8219 This web page also provides a link to a free PDF copy of the same publication. If you don’t know the location of your county extension office, see http://www.ksre.ksu.edu/Map.aspx (Ward Upham)

Turfgrass:
Controlling Wild Violets in Lawns

Pests:
Ash/Lilac Borer

Note: Ash/Lilac Borer is a different insect than Emerald Ash Borer. Ash/Lilac Borer has been around for many years while Emerald Ash Borer has been confirmed in only Douglas, Wyandotte, Leavenworth and Johnson counties in Kansas.

If you have had problems with canes or stems of lilac and privet suddenly wilting, or ash trees that show borer holes in the trunk and larger branches, the ash/lilac borer may be to blame. This insect causes the base of infested lilac stems to swell and the bark to separate from the wood. A fine sawdust-like material is present around holes in the canes. Ash and mountain ash also are affected. The borer attacks the trunk, which may cause bark to swell and crack if there are repeated infestations.

Ash/lilac borers overwinter as larvae in infested trees and shrubs. Moths generally begin to emerge in mid to late April. Emergence peaks in May, dwindles by mid to late June and ends by the first week of July. However, this varies by year. The moth has clear wings and resembles a wasp. There is one generation per year.

Public and commercially managed properties often use pheromone traps to determine the presence of adults. Spray treatments are started seven to 10 days after capture of the first moths.

Sprays also can be timed using phenology, the practice of timing one event by another. The first spray for ash/lilac borer should be applied when the Vanhoutte spirea is in full to late bloom. This is often about the third week in April but can be as early as late March and as late as mid-May. Apply a second spray four weeks after the first. To see a photo of Vanhoutte spirea, go to: http://plantsci.missouri.edu/ps2210/list9/spix_van.htm .

Thoroughly treat the trunk and larger limbs of ash or the lower portion of the stems of lilac or privet. Heavily infested ash should be cut and burned during the fall and winter. Infested stems of lilac or privet should be removed as well.

Bifenthrin or permethrin (Hi-Yield Garden, Pet, and Livestock Insect Control and 38 Plus Turf, Termite and Ornamental Insect Control) are labeled for control. Though there are a number of homeowner products that contain one or the other of these two active ingredients, the permethrin products listed above are the only ones I've found that specifically lists the ash/lilac borer on the label with directions for control. (Ward Upham)

Mole Control

Though moles spend most of their time underground, the damage they cause above ground is all too visible. Meandering paths of upheaved soil are evidence of the small mammals foraging for food. Some tunnels may be abandoned soon after being built while others are travel lanes and used for a longer period of time. Even though moles do not feed on plant matter, they can still cause damage by disturbing roots and uprooting small plants.

Numerous home remedies have been concocted to control moles including chewing gum, noisemakers, broken glass, bleaches, windmills, and human hair. None have been found to provide consistent and reliable control. Poison baits also fail to work because moles feed on earthworms and grubs, not vegetable matter. Even grub control products are ineffective as they do not control earthworms, and earthworms are the primary food source for moles.

The best control method is the use of traps. There are three types of traps (harpoon, choker, and scissor-jawed) and each can be effective but may take some time to master. Try the following suggestions.

Moles use some tunnels more than others. Use a broomstick or something similar to poke holes in a number of runs. Check a day later to see which runs have been “repaired.’ These are the active runs and should be used for trap placement.

Place a trap in an active run by excavating soil, placing the trap and then replacing loose soil. Secure the trap so that the recoil will not lift the trap out of the ground. Make sure the triggering mechanism is in the center of the run.

Finally, push down two more holes, one on each side of the trap. Moles should be caught when they try to repair the tunnel. Move traps if no moles are caught within three days.

For more information as well as “How-to” videos, see http://www.wildlife.k-state.edu/species/moles/index.html (Ward Upham)

Butterfly Gardening

Butterfly gardening is becoming more popular with Kansans. Providing for the basic needs of butterflies, such as food, shelter and liquids, will encourage butterflies to visit this summer. There are a number of plants that attract butterflies.

However, different species of butterflies prefer different plants. Using a variety of plant material that vary in blooming times of day and year helps attract a diverse group of visitors. Plant groups of the same plant together; a single plant is
difficult for a butterfly to detect. If trying to attract a certain species of butterfly, learn which plant(s) that butterfly prefers, and then emphasize that plant in your planting. Annuals that attract butterflies include ageratum, cosmos, French marigold, petunia, verbena and zinnia.

Perennials and shrubs can be split into those that bloom early, mid-season and late. Good choices for those that bloom early are allium, chives, forget-me-not and lilac. Bee balm, butterfly bush, black-eyed Susan, buttonbush, butterfly weed, daisy, daylily, gaillardia, lavender, lily, mint, phlox, privet, sunflower and veronica are fitting picks for mid-season bloom. Late bloomers include aster, glossy abelia and sedum.

There are other things you can do to encourage butterflies. Butterflies are cold-blooded and like open areas where they can sun themselves on cool days and shade to cool off when the sun is too intense.

Butterflies also need water. A simple way to make a butterfly pool is to take a bucket, fill it with gravel, and bury it to the rim. Now add water, sugar water or sweet drinks so that the butterflies can land on the gravel but still reach the liquid.

Our Johnson County Master Gardeners have put together a fact sheet on creating a butterfly habitat here. (Ward Upham)

Contributors: Ward Upham, Extension Associate

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Horticulture Newsletter 2015, No. 17

4/28/2015

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Video of the Week:
Supertunias Grow Big

Turfgrass:
Fertilize Irrigated Cool-Season Grass in May

May is an excellent time to fertilize cool-season lawns such as tall fescue and Kentucky bluegrass if they will be irrigated throughout the summer. Non-irrigated lawns often go through a period of summer dormancy because of drought and do not need this fertilization.

May is a good time to fertilize because the springtime flush of growth characteristic of these grasses has tapered off, so the fertilizer you apply will be less likely to cause excessive shoot growth than if you fertilized at full rate in April. Slow-release nitrogen sources are ideal. These nitrogen sources promote controlled growth, which is desirable as the stressful summer weather approaches. Relatively few fertilizers available to the homeowner supply ALL of the nitrogen in the slowly available form. But one such product that is widely available is Milorganite. Other such products available in the retail market include cottonseed meal, alfalfa-based fertilizers, and any other products derived from plants or animals. (Bloodmeal is an exception, and contrary to popular belief, the nitrogen it supplies is quickly available.) These products are all examples of natural organic fertilizers. They typically contain less than 10 percent nitrogen by weight, so compared to most synthetic fertilizers, more product must be applied to get the same amount of nitrogen. Translation: they are more expensive! Apply enough to give the lawn one pound of nitrogen per 1,000 square feet. For example, if the fertilizer is 6 percent nitrogen by weight, you will need to apply almost 17 pounds of fertilizer product per 1,000 square feet. Summer lawn fertilizers that contain at least a portion of the nitrogen as slow-release are fine to use as well. Be sure to follow label directions. If cost is prohibitive, you can use the less expensive quick-release (i.e., soluble) sources, but split the application into two doses as follows: apply enough to give the lawn 0.5 lb nitrogen per 1,000 square feet in May and again in early June. (Ward Upham)

Controlling Wild Violets in Lawns

Fruit:
Fertilizing Grapes

Year of Planting: Apply one-half cup of a 10-10-10 fertilizer per vine as growth begins in the spring. Repeat after one month. Fertilizers should be spread evenly from the trunk out 3 to 5 feet.

Second Year: Apply 1 cup of a 10-10-10 fertilizer per vine as growth begins in the spring. Fertilizers should be spread evenly from the trunk out 3 to 5 feet.

Mature Vines (3 years and older): If the soil test recommends phosphorus and potassium, use a 10-10-10 fertilizer at the rate of 2 cups per mature vine. Fertilizers should be spread evenly from the trunk out 3 to 5 feet. If, however, there are adequate levels of phosphorus and potassium, add 3/4 cup of a high nitrogen fertilizer such as a 27-3-3, 29-5-4, 30-3-3 or something similar instead of the 10-10-10. Though recommended for lawns, these fertilizers will also work well as long as they do not contain weed killers or crabgrass preventers. Fertilizers should be spread evenly from the trunk out 3 to 5 feet. (Ward Upham)

Fruit Tree Sprays and Rain

A spreader-sticker should be used in fruit tree sprays to improve the distribution and retention of fungicides and insecticides on fruit and leaves. However, even with a spreader-sticker, a rain can reduce the length of time the materials are effective. Less than one inch of rain since the last spray will not significantly affect residues. One to two inches of rain will reduce the residue by one half. Reduce the number of days until the next spray by one half. More than two inches of rain since the last spray will remove most of the spray residue. Re-spray as soon as possible. Details on when and what to spray are available in the K-State Research and Extension publication, "Fruit Pest Control for Home Gardens" at http://www.ksre.ksu.edu/bookstore/pubs/c592.pdf . (Ward Upham)

Vegetables:
Sweet Corn Primer

It used to be simple to decide which sweet corn to plant. You simply chose a cultivar and planted when the soil temperature reached 55 degrees. Now it has become more complicated due to genetic advances in sweet corn. Breeders have found certain genes that improve “standard” sweet corn. Below is an overview of the types commonly available to homeowners.

Standard (su): This is our “normal” sweet corn and contains a “sugary gene” (su). Standard sweet corn should be isolated from field corn, popcorn, supersweets and ornamental corn. To isolate one type of corn from another, do not plant one type within 200 to 250 feet or be sure to have a difference of 12 to14 days in time to maturity.

Plant when the soil temperature reaches at least 55 degrees. Recommended varieties include Honey and Cream, Silver Queen, Sterling Silver, Jubilee, or Merit.

Supersweet (sh2): Though supersweets have up to three times the sweetness of standard sweet corns and hold their sweetness longer after harvest due to the sh2 gene, they do have some drawbacks such as tougher kernels and a lack of some of that good “corn” flavor. They also need to be isolated from other sweet corn types and are very sensitive to cooler soils. Wait until the soil temperature reaches 65 degrees before planting. Try Candy Store, Florida Staysweet, Sugar Loaf, Sweet Time, or Sweetie.

Sugar Enhanced (se): These are probably the most popular type of sweet corn grown due to their tender kernels, good flavor and less sensitivity to cool soils (60 degree soil temperature for planting). They hold their post-harvest sweetness longer than standard types but will not hold sweetness as long as the supersweets. The sweetness from the sugar-enhanced types is due to the “se gene.” If both parents were se types, the variety is known as an se+ or se se. If only one parent was an se type and the other an su type, then the variety will be listed as se. They do not need to be isolated other than from the supersweets. Suggested varieties include Bodacious, Ambrosia, Sweet Temptation, Delectable and Miracle.

Triplesweet (synergistic): The newest types of sweet corns blend the su, se and supersweet types with the goal of combining the best characteristics of each. We don’t have firm recommendations yet but you may want to try Serendipity, Polka, Avalon or Frisky. (Ward Upham)

Miscellaneous:
Field Bindweed Control

Field bindweed is difficult to control, especially for homeowners, but there are options.

Home Vegetable Gardens: Weed control requires taking the treated portion of the garden out of production for a time.

Glyphosate - Glyphosate is sold under a wide variety of names, the most common being Roundup. Take the garden out of production when treating.

1. Glyphosate is a non-selective herbicide that will kill whatever it hits but is inactivated when it contacts the soil.

2. Glyphosate is most effective when applied to bindweed that is at or beyond full bloom. You can treat earlier but don't skip the late summer to fall application.

3. Do not apply to bindweed that is under moisture stress or not growing well.

Turf: Selective herbicides are available. A herbicide with the trade name of Drive (quinclorac) is now packaged in homeowner combination herbicides such as Fertilome Weed-Out with Q, Ortho Weed-B-Gon Max + Crabgrass Control, Monterey Crab-E-Rad Plus and Bayer All-in-One Lawn Weed and Crabgrass Killer.

Commercial applicators can also use Drive (quinclorac) as well as Q4 (contains quinclorac). Products with Drive work better than glyphosate and are selective. Note that lawns treated with Drive should not use clippings in compost or as mulch as Drive is very stable on grass clippings. We recommend clippings be returned to the lawn anyway but if they are bagged, they should be discarded. Do not apply products with Drive over exposed roots of trees and ornamentals. It would be best to avoid spraying beneath the canopy of any trees to avoid possible damage. If there are plans to convert a section of lawn to a vegetable garden, do not use Drive on that area. Eggplants can be damaged if planted within 12 months of areas treated with Drive, and tomatoes can be damaged if planted within 24 months.

Shrub Beds: Use a spray of glyphosate between plants. Use a shield if spraying near plants to keep spray from contacting green plant material. Remember, glyphosate will hurt your shrubs if it contacts green tissue.

It is possible to control field bindweed by pulling, but you must be extremely persistent. I remember reading a study from the 1940s that found that bindweed produces enough energy to start strengthening the roots when it reached the six-leaf stage. So, if pulling, never allow plants to produce more than six leaves. (Ward Upham)

Ornamentals:
Leaves and Seed Pods from Last Season Didn't Fall

Last fall we mentioned marcescence. This condition is caused by a very quick change from warm weather to cold during the fall. Trees usually begin to prepare for winter by absorbing nutrients from the leaves and inducing each leaf to form an abscission layer at the base of the leaf stem. The abscission layer weakens cell walls and allows the leaves to fall. The quick change from warm to very cold weather this November killed the still green leaves before the abscission layer had formed. The seed pods on some redbud trees also did not form an abscission layer. Therefore, leaves and seed pods have remained attached to affected trees.

Though marcescence itself did not harm trees or shrubs, that quick drop in temperature did in certain cases. Various trees and shrubs such as Bracken’s Brown Magnolias and cotoneaster were winterkilled or damaged by the weather. In many cases, crapemyrtles were burned to the ground but may put up new growth from underground.

There is nothing we can do to help plants other than prune back dead branches and give them excellent care during the stress of summer by watering as needed.

There are not many people around who remember the Armistice Day freeze of 1940. It was far more severe that what we saw last fall. I remember my dad talking about how the temperature was in the 60's during the day and almost got down to 0 that night. Plants were not hardened off and the amount of damage was incredible. Most apple trees were killed outright. Let’s hope we never see that again. (Ward Upham)

Pests:
Asparagus Beetle

Asparagus is doing well but be on the lookout for asparagus beetles. Both the adult and larvae of asparagus beetles feed on asparagus spears by chewing the tips and spear surfaces, leading to scarring and staining of the spear tips. Asparagus beetles overwinter as adults in trash near the garden. The adults are a blue/black beetle with a red prothorax with yellow spots. The larvae are a soft, greenish grub. Small, elongated, black eggs — sticking out long ways from the side of asparagus spears — are laid on developing spears.

Early control of beetles is important to reduce feeding damage later. Sevin will provide control (a one-day wait before harvest is required). Some products with permethrin are also labeled but require a 3-day waiting period between spraying and harvest. (Ward Upham)

Brownheaded Ash Sawflies

Based on reports posted by Department of Entomology Diagnostician regarding her having received specimens of adult brownheaded ash sawfly, I went out to a site where ash trees have been heavily infested the past couple of years. And, they are back. Though from a distance all appears normal, upon closer look, “pinhole feeding” is underway. By enlarging the image, the still wee-larvae responsible for the “nibble holes” can be easily seen.

To treat or no-to-treat becomes an individual’s decision. Should trees become defoliated, they will rapidly recover, producing a flush of new foliage. (Bob Bauernfeind)

Contributors: Bob Bauernfeind, Entomologist; Ward Upham, Extension Associate

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Turfgrass: Controlling Wild Violets in Lawns

Horticulture Newsletter 2016, No. 15

Video of the Week:
Butterfly Gardens

Fruit:
Fertilizing Blueberries

Controlling Weeds in Strawberries

Vegetables:
Help for New Vegetable Gardeners

Turfgrass:
Controlling Wild Violets in Lawns

Pests:
Ash/Lilac Borer

Mole Control

Butterfly Gardening

Horticulture Newsletter 2015, No. 17

Video of the Week:
Supertunias Grow Big

Turfgrass:
Fertilize Irrigated Cool-Season Grass in May

Controlling Wild Violets in Lawns

Fruit:
Fertilizing Grapes

Fruit Tree Sprays and Rain

Vegetables:
Sweet Corn Primer

Miscellaneous:
Field Bindweed Control

Ornamentals:
Leaves and Seed Pods from Last Season Didn't Fall

Pests:
Asparagus Beetle

Brownheaded Ash Sawflies

Authors

Subscribe to the newsletter by entering your e-mail and clicking the link below

Archives

Categories

Turfgrass: Controlling Wild Violets in Lawns

Horticulture Newsletter 2016, No. 15

Video of the Week:​Butterfly Gardens

Fruit:Fertilizing Blueberries​

Controlling Weeds in Strawberries

Vegetables:Help for New Vegetable Gardeners

Turfgrass:Controlling Wild Violets in Lawns

Pests:Ash/Lilac Borer

Mole Control

Butterfly Gardening

Horticulture Newsletter 2015, No. 17

Video of the Week: Supertunias Grow Big

Turfgrass:Fertilize Irrigated Cool-Season Grass in May

Controlling Wild Violets in Lawns

Fruit:Fertilizing Grapes

Fruit Tree Sprays and Rain

Vegetables:Sweet Corn Primer

Miscellaneous:Field Bindweed Control

Ornamentals:Leaves and Seed Pods from Last Season Didn't Fall

Pests:Asparagus Beetle

Brownheaded Ash Sawflies

Authors

Subscribe to the newsletter by entering your e-mail and clicking the link below

Archives

Categories

Video of the Week:
Butterfly Gardens

Fruit:
Fertilizing Blueberries

Vegetables:
Help for New Vegetable Gardeners

Turfgrass:
Controlling Wild Violets in Lawns

Pests:
Ash/Lilac Borer

Video of the Week:
Supertunias Grow Big

Turfgrass:
Fertilize Irrigated Cool-Season Grass in May

Fruit:
Fertilizing Grapes

Vegetables:
Sweet Corn Primer

Miscellaneous:
Field Bindweed Control

Ornamentals:
Leaves and Seed Pods from Last Season Didn't Fall

Pests:
Asparagus Beetle