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The Diapause of Gypsy Moth, Lymantria dispar (L.) (Lepidoptera: Lymantriidae)
Author(s) -
ATAYKADIRI ZINEB,
BENHSAIN NOUFISSA
Publication year - 2005
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1196/annals.1327.028
Subject(s) - lymantria dispar , diapause , ecdysteroid , lepidoptera genitalia , biology , instar , ecdysterone , gypsy moth , larva , endocrinology , botany , hormone
A bstract :Lymantria dispar undergoes a prolonged obligatory pharate first instar larval diapause. Little information is available on the endocrine regulation of this diapause. The purpose of the present paper was to obtain information on ecdysteroid titers during the initial, middle, and terminal phases of diapause. We also investigated the effect of exogenous ecdysterone on diapause interruption. Ecdysteroid titers, measured by radioimmunoassay, were higher in diapausing eggs. Furthermore, exogenous ecdysterone did not prevent diapause. Ecdysteroids seem to play a role in the induction and maintenance of the pharate first instar larval diapause, with a drop in the ecdysteroid titer being essential for diapause termination.