Guide to Garden Insects and Lawn Symptoms

Fall armyworms are surface area feeders. Fall armyworms are small and green with a black head when they hatch, however they grow quickly and end up being darker with age.

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See picture 2. Evaluate the turfgrass health and vigor, the size of the caterpillars, the quantity of feeding damage, and the time till expected frost when identifying if insecticide treatment is necessitated. Carefully scout to determine the number, size, and circulation of fall armyworms and the condition of the turfgrass. Small armyworms (greenish in color) are a lot easier to manage than caterpillars nearing their full-grown length of 1.5 to 2 inches.

Mow tall turfgrass before treatment to enhance insecticide protection. Irrigate lightly several hours before treatment to increase larval activity on the soil surface.

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If there is no quick control of fall armyworms after using a pyrethroid, consider utilizing a various class of insecticide, or hire a lawn care business to use a chlorantraniliprole or tetraniliprole substance. Azadirachtin insecticides (Neem oil) can supply control of small larvae and are certified natural.