Predation capacity and prey preference of <Emphasis Type="Italic">Chrysoperla carnea</Emphasis> on <Emphasis Type="Italic">Pieris brassicae</Emphasis> |
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Authors: | Ningxing Huang Annie Enkegaard |
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Institution: | (1) Institute of Plant & Environmental Protection, Beijing Academy of Agriculture & Forestry Science, 100097 Beijing, China;(2) Faculty of Agricultural Sciences, Institute of Integrated Pest Management, Research Centre Flakkebjerg, Aarhus University, 4200 Slagelse, Denmark; |
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Abstract: | The predation capacity and prey preference of larvae of Chrysoperla
carnea (Stephens) (Neuroptera: Chrysopidae) on eggs or larvae of Pieris brassicae (Linnaeus) (Lepidoptera: Pieridae) in the absence and presence of cabbage aphids as an alternative prey were evaluated in
laboratory experiments at 25°C. Both instars preyed upon butterfly eggs and larvae as well as on cabbage aphids with the third
instar being the most voracious. The lacewings had a strong preference for caterpillars to butterfly eggs. In the presence
of the aphids the predation on P. brassicae eggs or larvae was either completely abandoned or reduced by about 70%, respectively, by second instar lacewings and either
reduced by about 80% or maintained, respectively, by third instar lacewings. Both instars thus had a clear preference for
aphids compared to eggs of P. brassicae. However, second instar lacewings preferred aphids to caterpillars whereas the opposite was the case for third instar lacewings.
The results indicate that 3rd instar C. carnea has a potential as biocontrol agent against P. brassicae. |
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Keywords: | |
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