Dose- and time-response assessments ofHeterorhabditis heliothidis andSteinernema feltiae [Nem.: Rhabitida] againstAedes aegypti larvae |
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| Authors: | N B Molta W M Hominick |
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| Institution: | (1) Department of Pure & Applied Biology, Imperial College at Silwood Park, SL5 7PY Ascot, Berkshire, UK;(2) Present address: Department of Biological Sciences, University of Maiduguri, Bama Road, P.M.B. 1069, Maidugurugi, Nigeria |
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| Abstract: | Steinernema feltiae (=Neoaplectana carpocapsae) andHeterorhabditis heliothidis were tested against 3rd instarAedes aegypti larvae in the laboratory. Different dosages of the nematodes and varying durations of exposure were assessed.H. heliothidis was more effective thanS. feltiae. Larval mortality showed a positive linear correlation with both nematode dosage and the duration of exposure. The number
of nematodes of both species that gained access to the haemocoele of larvae was always low, but increased with dosage and
exposure time. The rate of melanization of the nematodes in the larvae was correlated with dosage, but was not affected by
the duration of exposure.
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| Keywords: | Heterorhabditis heliothidis Neoaplectana carpocapsae DD-136 Steinernema feltiae Aedes aegypti entomophilic nematodes dose-response time-response |
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