contact insecticide


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contact insecticide

a chemical (e.g. DDT, Malathion) lethal to insects when they alight on a surface coated with the poison. Compare SYSTEMIC BIOCIDE.
References in periodicals archive ?
Systemic insecticides are used for sharpshooter control due to their longer residual action compared to contact insecticides.
It would be ideal for controlling whiteflies and other target pests on high-value crops like poinsettias that have low damage thresholds and on greenhouse-grown vegetable crops for which low levels of contact insecticides are preferred," Simmons says.
Contact insecticides kill the worker ants immediately, but rarely penetrate deeply enough into the mound to reach the queen.
At this time, the only treatments with hemlock woolly adelgids present were the control trees and trees treated with the contact insecticides, horticultural oil and Talstar, as opposed to systemic insecticides.
Again these can be controlled with many contact insecticides but a lot of gardeners prefer to attempt to trap them.
1998), the efficacy of an additional 5 residual and 6 contact insecticides registered for home and commercial use in California were tested against P.
The contact insecticides evaluated included: (1) 0.