Abstract
Insecticide food baits based on fipronil are widely represented in Russia. The effectiveness of six food baits containing fipronil and its mixtures with other active ingredients was evaluated against four laboratory strains of the German cockroach – insecticide-susceptible S-NIID and multi-resistant MAG, CR, and DM. A slowdown in the manifestation of symptoms of poisoning in cockroaches of resistant strains was revealed. The resistance indices calculated by LT50 and LT95 values were high: 5–12? for males and 3–13? for females, and 10–>21? for males and >14? for females, respectively. By day 21, 10?% of the DM males and 15–85?% of the females of all three resistant strains survived. Keywords: fipronil, German cockroach, resistance, food baits, phenylpyrazoles.
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