Influence of gibberellic acid on some biological parameters of ectoparasitoid, Bracon hebetor (Say, 1836) (Hymenoptera: Braconidae)

Year 2018, Volume: 31 Issue: 1, 13 - 16, 30.03.2018

Özgür Özcan Nevran Eylem Akman Gündüz

Abstract

Different concentrations (2, 5, 10, 50, 100, 200, 500 and 1000 mg/L) of
gibberellic acid (GA₃) were used to determine the effects of plant
growth regulators on development, fecundity, sex ratio and longevity of
parasitoid Bracon hebetor
(Hymenoptera: Braconidae) reared on greater wax moth, Galleria mellonella (Lepidoptera: Pyralidae). Treatment with GA₃
prolonged the developmental period of female wasps at 2, 50, 500 and 1000
mg/L and at 10, 500 and 1000 mg/L in male wasps. However, GA₃ did
not negatively affect the fecundity and sex ratio of parasitoid. Bracon hebetor females reared on GA₃-treated
hosts had lower longevity at 10, 500 and 1000 mg/L than the females reared on
untreated hosts. For males a significant decline in longevity was also recorded
at 5 and 10 mg/L with respect to controls.

Keywords

Gibberellic acid, Bracon hebetor, Developmental time, Fecundity, Longevity

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