Reduction of Manduca sexta Fecundity and Fertility by L-Canavanine122

Abstract
Agar-based artificial diets containing various concentrations of L-canavanine werc fed to 5th-instar tobacco hornworm larvae. The number of chorionated oocytes in the 4-day-old moths, resulting from these larvae, was concentration-dependent between 0.75 and 2.5 mM canavanine. The mean number of chorionated oocytes from the 2.5 mM treatment was only 7.5% of that obtained from the untreated control. Fecundity and fertility of moths from 1 mM canavanine were 14 and 21% of untreated control values, respectively. Matings between treated and untreated moths show that only female reproductive capacity was significantly reduced by canavanine under these conditions.

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