12/10/2023 0 Comments Happy holidays christmas tree bagworm![]() The eggs are laid in the bag where they pass the winter. The wingless female never leaves the bag and is fertilized by the winged male. ![]() The worms then attach the bags firmly to branches or other objects and change into the adult stage. At this time the bags are about 2 inches long and can no longer be killed by pesticides. Each female bag can produce over 1,000 bagworms.īagworms mature in late August or early September. If disturbed, they retreat safely inside, and it is almost impossible to pull them out. The caterpillars crawl part way out of the bags to feed. As soon as the young worms appear, they start to spin bags and continue to enlarge these as they feed and grow. LIFE HISTORYĮarly in June, the insects hatch from eggs which wintered in the old bags attached to tree branches. Bagworms are common throughout the state. These bags, composed of silken threads and bits of foliage, look so much like a part of the tree that they may go unnoticed until extensive damage has occurred. Bagworms are caterpillars that live inside spindle-shaped bags which they construct to protect themselves against birds and otherĮnemies. Sadof, Extension Entomologistsĭuring July and August, bagworms may defoliate arborvitae, junipers and other trees and shrubs.
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