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- W2019179362 abstract "Larval diapause induction in Ephestia cautella (Walker) (Lepidoptera: Pyralidae) is a function of the interaction between genotype and larval crowding. A diapause stock in which 79% of the larvae diapaused under crowded conditions and 40% diapaused under uncrowded conditions was maintained by selection. Outbreeding of adults from this diapause stock to those from a non-diapause stock resulted in 36% diapause under crowded conditions and 6% diapause under uncrowded conditions. The rate of termination of larval diapause is inheritable and temperature dependent. These data seem to explain the seasonal trends in percentage larval diapause among E. cautella infesting citrus pulp during storage. Larval diapause was induced in groups of larvae by crowding in mass cultures and in single larvae by rearing on a small amount of fresh diet or on a larger amount of fresh diet containing residual diet from crowded cultures. The diapause-inducing effects of this residual diet could be removed by extraction with lipid solvents. Some activity was demonstrated when the extract was dried onto fresh diet. RESUME INDUCTION DE LA DIAPAUSE CHEZ EPHESTIA CAUTELLA: INTERACTION ENTRE LE GÉNOTYPE ET LA DENSITÉ L'induction de la diapause larvaire d'Ephestia cautella (Walker) dépend du génotype et de la densité larvaire. Des croisements à l'intérieur de la souche diapausante donnent 79% de diapause aux fortes densités larvaires et 40% aux faibles densités. Les croisements des adultes de cette souche avec ceux de la souche non-diapausante donnent 36% de diapause aux fortes densités et 6% aux faibles densités. La fréquence de fin de diapause est héréditaire et dépend de la température. Ces résultats peuvent expliquer les variations saisonnières du taux de diapause E. cautella dans la pulpe de citron stockée. La diapause larvaire a été induite chez des groupes de chenilles par surpeuplement dans des élevages standards, et chez des chenilles isolées par élevage sur une quantité limitée d'aliments frais ou sur une quantité abondante d'aliments frais contenant des résidus alimentaires provenant d'élevages surpeuplés. Les effets inducteurs de ces résidus alimentaires disparaissent après extraction avec les solvants de lipides. Une certaine action est observée par de l'extrait sec sur de l'aliment frais." @default.
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- W2019179362 date "1980-07-01" @default.
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- W2019179362 title "DIAPAUSE INDUCTION IN EPHESTIA CAUTELLA: AN INTERACTION BETWEEN GENOTYPE AND CROWDING" @default.
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- W2019179362 doi "https://doi.org/10.1111/j.1570-7458.1980.tb02984.x" @default.
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