Activity of a juvenile hormone analogue as a protectant against the lesser grain borer, Rhizopertha dominica (F.) (Coleoptera: Bostrichidae)

Abstract

The juvenile hormone analogue (JHA) 6', 7',-epoxy-3, 7'-dimethyl-undec-2'-enyl 6-ethyl-3-pyridyl ether at 10 ppm (v/v) applied to whole wheat grains was not toxic to adult insects, but effectively reduced the F, generation of the lesser grain borer, Rhizopertha dominica (F.). However, topical applications of 4 ppm (v/v) of the JHA prevented normal metamorphosis of the larvae and pupae; all the test insects died due to morphogenetic abnormalities induced by treatment with the JHA.Resume-L'enfant hormone analogue (JHA) 6', 7'-epoxy-3, 7'-dimethyl-undec-2'-enyI 6ethyl-3-pyridyl ether, a 10 ppm (v/v) est applique aux grains ble complet n'avalent pas toxique aux insectes adultes, mais 11s ont reduit efficacement la F, generation moins de grain ennuyer, Rhizopertha dominica {¥.). Cependant les applications d'actuality de deux deml ppm (v/v) de la JHA a empeche la metamorphose normal de la larvae et chrysalide; toot les Insectes experimenter ont mort dQ a I'anomalie morphogenetlque a persuade du traitement avec la JHA.Mots CUs: L'enfant hormone analogue, survivre, Rhizopertha dominica, reproduction progeniture, le d£faut metamorphique, l'e'chec de la transformation, les ailes ecrasent de l'intermecliaire, I'anomalie morphoge'ne'tique a empech6 la metamorphose