Selection of insect parasitic nematodes for biological control of the garden chafer,Phyllopertha horticola |
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Authors: | P H Smits G L Wiegers and H J Vlug |
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Institution: | (1) Research Institute for Plant Protection (IPO-DLO), P.O.B.9060, 6700 GW Wageningen, The Netherlands |
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Abstract: | Larvae ofPhyllopertha horticola L. (Coleoptera: Scarabaeidae) cause increasing problems on sports fields and lawns in NW-Europe. A biological control programme
using insect parasitic nematodes is being developed. This paper contains the results of bioassays with various species and
isolates of the nematode generaHeterorhabditis andSteinernema. In bioassays in small pots with moist sand, most of the nematode isolates gave 30–60% mortality against each of the three
larval stages. The susceptibility of the grubs for nematode infection generally increased with larval development.H. bacteriophora, H. heliothidis, H. megidis, a DutchHeterorhabditis isolate NLH-E87.3 andS. glaseri 326 showed the highest mortality rates, with nearly 100% mortality of third instar grubs. The DutchHeterorhabditis isolate NLH-E87.3 andS. glaseri 326 were selected as candidates for further studies on their potential as biological control agents forP. horticola grubs in the field. |
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Keywords: | Heterorhabditis Steinernema Phyllopertha biological control insect parasitic nematodes |
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