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Endocrine regulation of reproduction and diapause in the boll weevil, Anthonomus grandis Boheman
Author(s) -
TaubMontemayor Tina E.,
Palmer James O.,
Rankin Mary Ann
Publication year - 1997
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/(sici)1520-6327(1997)35:4<455::aid-arch8>3.0.co;2-q
Subject(s) - anthonomus , biology , hemolymph , diapause , juvenile hormone , population , reproduction , zoology , boll weevil , insect , botany , endocrinology , ecology , larva , demography , sociology
A review of the literature for the hormonal control of reproduction and diapause in Coleoptera is presented. The role of juvenile hormone and juvenile hormone esterase (JHE) in the control of the different life history strategies of the boll weevil are examined. Elevated levels of hemolymph JHE were found to be positively correlated with survival throughout the winter in South Texas population of weevils. Winter weevils were examined for hemolymph vitellogenin (Vg) and their subsequent survival was monitored. The majority of weevils surviving beyond ten weeks had no hemolymph Vg. We conclude that elevated hemolymph JHE and the absence of Vg are good predictors of survivors in the South Texas population. The hormonal basis of diapause termination was examined using hormone treatment and implant therapy. We were unsuccessful in our attempt to induce post‐diapause reproductive development with all of our treatments. Only weevils given access to a food source were capable of reproductive development. Our recent experimental findings in the control of Vg synthesis and uptake in the boll weevil are reviewed. Arch. Insect Biochem. Physiol. 35:455–477, 1997. © 1997 Wiley‐Liss, Inc.