Factsheet: Least-Toxic Control of Chinch Bugs
Pest type: Insects
Adult chinch bugs are almost 3/16-inch long, have black bodies and fully developed wings that appear frosty-white except for distinctive triangular black patch-like markings at the middles of the outer margins. Adults appear as either long-winged or short-winged forms.
Lawn damage is caused mainly by young chinch bugs, called nymphs. In turfgrass areas, injury typically appears as yellow or dead drought-stressed or heat-stressed spots in the yard, most commonly in July and August. Infestations are usually initially localized because chinch bugs feed in aggregates.
Chinch bugs prefer sunny lawns. Discourage infestation by shading your lawn with trees and shrubs.
Test for chinch bugs by cutting the bottom out of a coffee or other metal can. Place into a yellowed patch of grass in the sun, about two inches deep into the soil. Fill with water. If infested, dead chinch bugs will float to the top within five minutes.
Properly water and fertilize your lawn.
Add agricultural limestone when the soil pH is below 6.5
Use home ingredients by spraying a mixture of soap and water over damaged or suspect regions and then placing a white flannel cloth over the area. Drenching the area will force the chinch bugs up and out of the grass where they will proceed to cling to the cloth for easy collection and disposal.
Bigeyed bugs, Geocoris spp., are a natural predator of the chinch bug, however these usually do not build up large populations until considerable turf damage has already occurred.
Look at your product labels and try to avoid products containing those chemicals listed below:
(A = acute health effects, C = chronic health effects, SW = surface water contaminant, GW = ground water contaminant, W = wildlife poison, B = bee poison, LT = long-range transport)
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