 Bagworms and Controlling Them
A Bagworm is a perennial moth like insect that resides on a number of evergreen as well as junipers in its larva stage. It causes extensive damage to plants and trees.
Bagworms winter over as eggs in the bag of the female from the year before. Therefore, your first measure of control can come by hand-picking all the bags from last year. These eggs hatch mid to late May through the end of June. Individual larvae drop from the bag on a strand of silk and either swing onto a branch or sail in the wind to another tree. Immediately upon landing, they build a silk-lined bag, often decorating it with bits of foliage. Larvae remain in the bag feeding, with only the head and thoracic segment extending out.
They are very small when they hatch, as the larvae grows, the bag expands the protective bag to accommodate its size.
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