Hydrellia spp. [Diptera: Ephydridae] attackingHydrilla verticillata in south India |
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| Authors: | S Krishnaswamy M J Chacko |
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| Institution: | (1) CAB International Institute of Biological Control, Bangalore, P.B. 2484, H.A. Farm Post, 560024, India;(2) Present address: Biological Control Centre, National Centre for Integrated Pest Management, Post Bag 2491, H.A. Farm Post, 560024 Bangalore, India |
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| Abstract: | The leaf-mining fliesHydrellia sp. andH. pakistanae Deonier were observed attacking the aquatic weedHydrilla verticillata (L.f.) L.C. (Hydrocharitaceae) in south India. Their life histories were very similar. The duration of the immature stages ofH. pakistanae was 25 to 29 days. The number of leaves ofH. verticillata mined by a single larva varied from 8 to 12. In the laboratory, adults feeding on 50% aqueous solution of honey lived for
6 to 21 days and laid an average of 26 eggs. Several overlapping generations occurred in the field except during the period
of drought. BothHydrellia sp. andH. pakistanae were heavily parasitized by the braconidsAdemon sp. nr.decrescens Nees andChaenusa sp.
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| Keywords: | Hydrilla verticillata Hydrellia spp aquatic weed India biology |
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