Juvenile hormone-like effects of a thiazolylurea on lepidopteran larvae

✍ Scribed by Marcia J. Loeb; Albert B. DeMilo; Grace Jones; Davey Jones

• Publisher: John Wiley and Sons
• Year: 1989
• Tongue: English
• Weight: 656 KB
• Volume: 12
• Category: Article
• ISSN: 0739-4462
• DOI: 10.1002/arch.940120202

✦ Synopsis

Heliothis virescens maintained on a diet containing 50 ppm of thiazolylurea

(5-[[[2-thiazolylamino]amino]carbonyl]-l,3-benzenedicarboxylic acid dimethyl ester) showed symptoms of juvenile hormone overdose in the last larval instar.

Increases in development time and weight, as well as larval color changes, were similar in animals fed thiazolylurea or topically treated with the juvenile hormone mimic methoprene. The juvenile hormone esterase titer profile in hernolymph of animals fed thiazolylurea was much broader than in controls, and peaked 2 days later than in controls; the premolt ecdysteroid peak in hemolymph o f animals fed thiazolylurea appeared 2 days earlier than in controls. These events are characteristic o f high hemolymph JH titers throughout the last larval instar.