Effects of Mixed Aphid Patches on Fecundity of Aphidoletes aphidimyza (Diptera: Cecidomyiidae)

doi:10.16409/j.cnki.2095-039x.2021.05.010

Abstract

Abstract: Aphidoletes aphidimyza (Rondani) is an important predatory natural enemy of many aphid species. Understanding the key factors influencing the predator's fecundity will contribute to the improvement of the mass production and application of A. aphidimyza in biological control. Here, we measured the fecundity of A. aphidimyza fed with three aphid species, Rhopalosiphum maidis Fitch, Rhopalosiphum padi Fitch, or Sitobion avenae Fabricius, individually or an equal mixture of 2 or 3 aphid species at 4 densities of 6 to 48 aphids/plant. The results showed that, regardless of individual species or in an equal mixture of 2 or 3 species, the lifetime fecundity of A. aphidimyza increased with the addition of aphid densities, significantly different between the 4 densities. The highest fecundity was observed at prey densities of 24 to 48 aphids/plant. When confined to the same prey density, A. aphidimyza deposited the fewest when provided with individual species of prey and the most when provided with a mixture of 3 species of prey. These results suggest that lifetime fecundity of A. aphidimyza is dependent on both density and species of prey. The higher density and more prey aphid species in a mixture are beneficial for high fecundity in A. aphidimyza.

Key words: Aphidoletes aphidimyza, oviposition tactics, prey density, mixed patch pattern, fecundity

CLC Number:

S476.2

FANG Meijuan, LUO Zhixin, HE Xiaoqing, LIU Dong, SONG Kai, ZHANG Heng, ZHAO Ying, WANG Yubo. Effects of Mixed Aphid Patches on Fecundity of Aphidoletes aphidimyza (Diptera: Cecidomyiidae)[J]. Chinese Journal of Biological Control, 2021, 37(4): 716-724.

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