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Jeannie from Springfield, Ohio writes

Will Monterey Once a year control kill bagworms on my arborvitae?

Answer:

Monterey Once A Year Insect Control II is not labeled for controlling bagworms. You will use 0.4-0.8 oz. of Permethrin SFR per gallon of water every 21 days as necessary for bagworm control.  Keep in mind that this needs to be applied before the bags have formed.  If the bags have already formed, there is little you can do for control other than to physically remove them. 

Answer last updated on: 03/02/2018

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