Susceptibility of two Coconut Pests,Oryctes rhinoceros [Col.: Scarabaeidae] andTirathaba rufivena [Lep.: Pyralidae], to the entomoparasitic nematodeSteinernema feltiae [= Neoaplectana carpocapsae] |
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Authors: | B Zelazny |
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Institution: | (1) PCA Albay Research Center, UNDP/FAO Coconut Pests and Diseases Project, Guinobatan, 4908 Albay, Philippines |
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Abstract: | Bioassay indicated that 1 st instar larvae ofOryctes rhinoceros are resistant to infections by the nematodeSteinernema feltiae (estimated LD50: 90 nematodes) but thatTirathaba rufivena larvae larger than 15 mm are highly susceptible (estimated LD50: 3 nematodes). The “All” strain and the “mexican” strain ofS. feltiae gave very similar responses. In a field trial 300,000 nematodes were sprayed on each of 25 palms to controlT. rufivena. Although some mortality from nematodes was observed, the treatment failed to reduce the pest population significantly. |
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Keywords: | Oryctes rhinoceros Scarabaeidae Tirathaba rufivena Pyralidae susceptibility to the entomoparasitic nematode Steinernema feltiae |
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