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- Title
Effects of Gibberellic Acid on Biological Parameters of the Larval Endoparasitoid Apanteles galleriae (Hymenoptera: Braconidae).
- Authors
Uçkan, Fevzi; Tüven, Aylin; Er, Aylin; Ergin, Ekrem
- Abstract
The impact of the plant growth regulator gibberellic acid (GA3) on parasitoid development and reproduction was examined using the endoparasitoid Apanteles galleriae Wilkinson (Hymenoptera: Braconidae). The effects of GA3 were assessed by rearing A. galleriae on hosts fed the growth regulator and then measuring a several life history traits: developmental time from egg to adult, adult longevity, body sizes, fecundity, and sex ratios. GA3 treatment yielded dose-dependent changes in adult longevity and duration of development. For example, at GA3, doses >10 ppm, the life span of both male and female adult wasps decreased by 19-23 d in comparison with parasitoids that developed on GA3-free hosts. Likewise, the length of development from egg to adult emergence significantly increased when A. galleriae developed on hosts fed the growth regulator at doses >200 ppm. In contrast, GA3 did not seem to alter adult body sizes, sex ratios, or fecundity, with the exception that F2 progeny production decreased by >40% at high concentrations (≥200 ppm). The potential significance of plant growth regulators on natural enemies used in integrated pest management programs is discussed.
- Subjects
GIBBERELLIC acid; GIBBERELLINS; APANTELES; PARASITOIDS; REPRODUCTION
- Publication
Annals of the Entomological Society of America, 2008, Vol 101, Issue 3, p593
- ISSN
0013-8746
- Publication type
Article
- DOI
10.1603/0013-8746(2008)101[593:EOGAOB]2.0.CO;2