Timing is critical in many things, including controlling bagworms. Though handpicking is effective through much of the year, often it is impractical because of the sheer number of bagworms. However, if you only see a few bags, now would be a good time to pick them off and destroy them.
As we mentioned above, large populations of bagworms can make handpicking impractical. In such cases, spraying is recommended. New bagworms will likely hatch and leave the mother's bag in May but spraying is usually not recommended until June. Spraying now will be ineffective because the young are too well protected inside their mother's bag. Watch for an article on when and what to spray a bit later in the season. If you can’t wait, we do have an article on bagworms that should prove helpful. (Ward Upham)
As we mentioned above, large populations of bagworms can make handpicking impractical. In such cases, spraying is recommended. New bagworms will likely hatch and leave the mother's bag in May but spraying is usually not recommended until June. Spraying now will be ineffective because the young are too well protected inside their mother's bag. Watch for an article on when and what to spray a bit later in the season. If you can’t wait, we do have an article on bagworms that should prove helpful. (Ward Upham)
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