S-Hydroprene

S-Hydroprene is an insecticide that prolongs the development duration of larvae and pupae, disrupts larval development, inhibits pupation, and shows larvicidal activity against Culex quinquefasciatus and Blattella germanica.

S-Hydroprene, when applied at concentrations of 0.1-0.6 mL/L (125 mg/mL) under aquatic conditions for 24 hours, exhibits minimal larvicidal activity against Culex quinquefasciatus larvae, achieving a maximum mortality rate of 9.33% at 0.6 mL/L and an LC50 of 0.020 mL/L. However, it significantly delays larval development in a dose-dependent manner, reduces adult emergence, and causes morphological abnormalities, suggesting its potential as an insect growth regulator for vector control. In another study, application of S-Hydroprene at 18-100 mg/m² through direct contact or vapor exposure over 44 days does not significantly impact the hatching rate of B. orientalis oothecae or the nymph emergence rate per ootheca. However, at direct contact doses of 18 mg/m² and 100 mg/m², S-Hydroprene induces dose-dependent deformities in the progeny of A. hagenowii, whereas 100 mg/m² vapor exposure does not result in deformities. After S-Hydroprene treatment (18-100 mg/m²; direct contact or vapor exposure; parental exposure), all treated groups of F1 A. hagenowii females with normal reproductive capacity maintain reproductive activity comparable to the parental generation, but malformed F1 females at 100 mg/m² direct contact exhibit significantly reduced host attack rate, fecundity, and survivability.