Development and testing of new combined insecticides against the brown marmorated stink bug (BMSB, Halyomorpha halys) in laboratory conditions.
2021
Thirty-six insecticidal combinations with various ratio of bifenthrin and malathion were prepared and the dependence of biological effectiveness of combinations on the ratio of bifenthrin to malathion amount was investigated. Contribution of other components (mineral materials, essential oil, emulsifier-dispersant, hydroxyethyl cellulose, etc.) to the total biological effectiveness of the combined insecticides was estimated. It has been found that synergy of components and biological effectiveness of combinations against the target pest noticeably differs in Abasha-Senaki and in Kobuleti-Khelvachauri populations. This fact can be explained by a noticeable resistance to bifenthrin developed by the populations of Senaki and Abasha municipalities of Georgia. The acute toxicity of combinations to mammals (white rats) has been investigated, which has been found to be several (3-5) times lower than that of the widely used combined insecticides currently available. This circumstance can be explained by the significantly reduced total content of synthetic insecticidal components in synergistic combinations.
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