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Juvenile hormone‐like effects of a thiazolylurea on lepidopteran larvae
Author(s) -
Loeb Marcia J.,
DeMilo Albert B.,
Jones Grace,
Jones Davey
Publication year - 1989
Publication title -
archives of insect biochemistry and physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.576
H-Index - 66
eISSN - 1520-6327
pISSN - 0739-4462
DOI - 10.1002/arch.940120202
Subject(s) - hemolymph , methoprene , juvenile hormone , biology , instar , heliothis virescens , larva , ecdysteroid , medicine , titer , endocrinology , esterase , hormone , juvenile , botany , biochemistry , noctuidae , antibody , ecology , immunology , enzyme
Heliothis virescens maintained on a diet containing 50 ppm of thiazolylurea (5‐[[[2‐thiazolylamino]amino]carbonyl]‐1,3‐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 hemolymph of animals fed thiazolylurea was much broader than in controls, and peaked 2 days later than in controls; the premolt ecdysteroid peak in hemolymph of animals fed thiazolylurea appeared 2 days earlier than in controls. These events are characteristic of high hemolymph JH titers throughout the last larval instar.