This is when they hatch and are at their most vulnerable. In some areas they hatch in early June. However, they often get spooked back into their sack if they are startled. They contain bacillus thuringiensis, a bacteria that is deadly to young bagworms. If you have many trees affected by bagworms, it can be expensive to thoroughly kill the bagworms with insecticide. Orthene, Talstar and Tempo are other insecticides that have been effective in killing newly-hatched bagworms. Thoroughly wet the leaves and needles of the trees that can be affected. Beware when spraying insecticide around pets and small children. Consider cordoning off the area just after you spray. This is when it can kill young larvae. Stop by late July and August when the bagworms are resilient and the insecticide no longer works.  Once September and early October begin, the adult bagworms begin fertilizing their eggs. You should begin the process of handpicking the egg sacks at this time. Adult male bagworms are moths with black wings and brown spots. They die after fertilization. Female bagworms remain inside the sack in their larval state.
خطط لمحاربة الديدان الكيسية بالمبيد الحشري في شهر مايو. ابحث عن بروز تشبه رؤوس الدود تخرج من أكياس البيض. اشترِ مبيدًا حشريًا. ضع المبيد الحشري في زجاجة رش. رش المبيدات الحشرية في أواخر مايو وشهر يونيو وأوائل يوليو.