What are Bagworms?

You’ve seen them hanging from evergreens and spruce trees every summer. Left unchecked bagworm populations will grow to damaging levels very quickly. One adult bagworm can produce over 1,000 baby bagworms.

When to Spray Bagworms

Late May to early June is the time to check for bagworms. Junipers and spruce seem to be bagworm magnets, but bagworms will feed on just about any kind of plant. Bagworm eggs overwinter on the leaves and needles of a host plant and hatch May through early June. During the egg hatch until the bagworm is about the size of a pencil eraser is the most effective time to kill bagworms using a liquid application of Cyonara or Bifenthrin insecticide.

How to Spray for Bagworms

When you find small bagworms, 1/2 inch or smaller, spray liquid Cyonara or Bifenthrin while temperatures are mild and the cocoon is thin and easily penetrated. Spray bagworms with Cyonara or Bifenthrin according to label specifications using a pump up or hose end sprayer. The Chapin Dial-n-Spray hose end sprayer can reach up to 20 feet. Saturate leaves and needles thoroughly spraying the ground under trees and bushes is also recommended. Cyonara and Bifenthrin are also effective for control of fleas, ticks, ants, cricket and chiggers in the lawn.

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