The best way to kill webworms with dormant oil is in the early spring while the tree is dormant. ... The control of fall webworms also includes the more toxic varieties of insecticides, such as Sevin or Malathion. Sevin is a webworm treatment that kills the webworms once they are outside of the nest.
Answers & Comments
Answer:
The best way to kill webworms with dormant oil is in the early spring while the tree is dormant. ... The control of fall webworms also includes the more toxic varieties of insecticides, such as Sevin or Malathion. Sevin is a webworm treatment that kills the webworms once they are outside of the nest.