Effects of the juvenile hormone analog pyriproxyfen on German cockroach, Blattella germanica (L.), tergal gland development and production of tergal gland secretion proteins.
Male German cockroaches possess secretory glands that secrete fluid into a pair of transverse depressions on the seventh and eighth abdominal tergites. We investigated the effects of altered juvenoid titer during the first part of the last instar on tergal gland secretory tissue development and the production of tergal gland secretion proteins. Male fifth (last) instar nymphs (1-3 days post-emergent) were topically treated with the JH analog pyriproxyfen. Light and transmission electron microscopy demonstrated that treatment with pyriproxyfen produced a visible decrease in the amount of tergal gland tissue present, a deformation of the overall shape of the gland located on tergite seven, and a less orderly arrangement of the secretory cells in the tissue. The protein fraction of tergal gland secretion was examined in pyriproxyfen-treated and control insects 1, 5, and 15 days after the insects molted to the adult stage. Amounts of all tergal secretion proteins were reduced in treated insects.
Saltzmann
K A
KA
Department of Entomology, Purdue University, West Lafayette, Indiana 47907, USA. saltzman@purdue.edu
Saltzmann
K D
KD
Neal
J J
JJ
Scharf
M E
ME
Bennett
G W
GW
D000818:Animals; D003058:Cockroaches / Q000187:drug effects* / Q000502:physiology* / Q000648:ultrastructure; D004591:Electrophoresis, Polyacrylamide Gel; D005088:Exocrine Glands / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D019476:Insect Proteins / Q000378:metabolism*; D007605:Juvenile Hormones / Q000494:pharmacology*; D008297:Male; D046529:Microscopy, Electron, Transmission; D011725:Pyridines / Q000494:pharmacology*
D019476:Insect Proteins; D007605:Juvenile Hormones; D011725:Pyridines; C055613:pyriproxyfen