Juvenile hormone analogs (JHAs) represent a class of insecticides that were designed specifically to disrupt endocrine-regulated processes relatively unique to insects. Recently we demonstrated that the crustacean juvenoid hormone methyl farnesoate programs oocytes of the crustacean Daphnia magna to develop into males. We hypothesized that insecticidal JHAs might mimic the action of methyl farn...

The German cockroach, Blattella germanica, is one of the most common pest species, and is a carrier of many pathogen and allergen factors in humans. Thus, regarding public health, the control of this insect is quite important. Dietary use of hormone analogues, especially juvenoids which disrupt reproductive organ development, is a relatively new method to control cockroaches. In this study, the...

Methoprene is a growth-regulating insecticide that manifests its toxicity to target organisms by acting as a juvenile hormone agonist. Methoprene similarly may exert toxicity to crustaceans by mimicking or interfering with methyl farnesoate, a crustacean juvenoid. We hypothesized that methoprene interferes with endocrine-regulated processes in crustaceans by several mechanisms involving agonism...

a bivoltine silkworm hybrid, ka x nb4d2 was treated with the juvenoid r394 (ethyl-9 cyclohexyl-3,7-dimethyl-2,4-nonadienoate) at a dose of 0.039 nl/larva at 24, 48, 72 and 96 h of 5th instar for silk yield improvement. treatment specific significant increase was observed in the cocoon and shell weight with no such marked variation in the shell percentage. notable changes were also seen in trait...

A bivoltine silkworm hybrid, KA x NB4D2 was treated with the juvenoid R394 (Ethyl-9 cyclohexyl-3,7-dimethyl-2,4-nonadienoate) at a dose of 0.039 nl/larva at 24, 48, 72 and 96 h of 5th instar for silk yield improvement. Treatment specific significant increase was observed in the cocoon and shell weight with no such marked variation in the shell percentage. Notable changes were also seen in tr...

The residual activity of Bacillus thuringiensis subsp. israelensis (BTI) and methoprene, a juvenile hormone analogue (juvenoid) was assessed when their novel granule formulations, were tested on mosquito and fly larvae. BTI B 5 GR mos­ quito larvicide at 5 and 10 ppm (a.i.) gave 100% control against L4 larvae of Aedes aegypti for 4 and 12 weeks, respectively. Similar prolonged 16 weeks efficien...