Per the manufacturer, if Acelepryn Xtra Insecticide was applied as a preventative, there is no need to reapply the product. If you made a curative application, it wouldn't hurt to apply it again. If treating for white grubs it is required to water in after application per the product label. …
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The application rates for Acelepryn Xtra Insecticide depend on the target insect you are treating. You will use 1.5 to 5 gallons of water per 1000 sq ft with the recommended rate per 1000 sq ft, therefore a 3 gallon tank sprayer would cover 0.5 to 2k sq ft.
Refer to list of target insects sta…
Acelepryn Xtra Insecticide states to apply when nymph are first observed for chinch control. For best time to apply in your specific area, it would be best that you speak with your local extension office for assistance
https://npic.orst.edu/pest/countyext.htm