Answer: Here are some methods of control. Cultivate under susceptible plants to a depth of 4 inches, which exposes the pupae to natural enemies, such as birds. Check carefully under branches, leaves, loose bark for masses of eggs and destroy them. Sticky traps can be placed on bands around the trunks. Horticultural oil and insecticides that are neem-based, can be applied, as well as Bacillus thuringiensis kurstaki or Btk, which targets the caterpillars.
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