0 a chemical substance made and used for killing insects, especially those that eat plants
1 a chemical substance for killing insects
For the rotation plots, sets of cards for all four insecticides used in the rotation schedule were prepared each week for the bioassays.
Each of the seasonal factors increased the impact of the insecticide because they lowered the population's growth potential.
Insecticide treatments (pyrethroids and neonicotinoids) applied before collection of the spring sample may be responsible for such selection.
To enable measuring the effect of reduced borer densities on maize yield, the maize monocrop and all intercrops were grown with and without insecticide treatment.
No insecticides were applied to the permanent data trees and two guard rows on either side throughout the study.
The use of insecticides has been the major control strategy for cowpea and okra pests, especially in the tropics.
Three chapters are devoted to insecticides, for mulations and application methods, and problems associated with their use, particularly the development by pests of insecticide resistance.
For this reason, reliance on insecticides as the sole means of managing infestations was considered at best a short term solution.
