David from Greensboro, Nc writes
Malathion would be a great product for worms on pecan trees. The active ingredients Spinosad or Bacillus thuringiensis can also be very helpful controlling webworms on pecan trees. Both active ingredients are natural and safe to use on edible plants and trees and both of them effect the way a caterpillar or worm can feed and cause them to stop eating and die.
Answer last updated on: 03/13/2019