Control of Luprops Tristis F. During its Dormancy With Insect Growth Regulators
2022
Binsha, P | Thomas, Sabu K
Hypersensitive and neurotoxic side effects of permethrin compounds and possibility of buildup of insecticide resistance against pyrethroid insecticides in darkling beetle Luprops tristis F. (Coleoptera: Tenebrionidae), a home-invading nuisance pest necessitates efficacy studies on other class of insecticidal compounds with more target specific action and less mammalian toxicity. The baseline dose-response bioassays conducted on L. tristis during their dormancy phase with three insect growth regulators (IGRs), fenoxycarb, diflubenzuron and 20-hydroxyecdysone (20E) revealed interesting results. Mortality (LC₅₀ and LC₉₀), fecundity and egg hatchability were estimated by exposing dormant beetles to a range of concentrations. These data revealed that their LC₅₀ values are within the permissible mammalian toxicity level. The capacity to reduce fecundity and hatchability of eggs (progeny production) together makes fenoxycarb a safer alternative to other pesticides in tackling L. tristis.
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