Efficacy of the entomogenous nematode Steinernema feltiae against a subterranean termite, Reticulitermes tibialis (Isoptera: Rhinotermitidae)
Epsky, N.D. | Capinera, J.L.
The potential of the entomogenous nematode Steinernema feltiae Filipjev (=Neoaplectana carpocapsae Weiser), Breton strain, for control of a subterranean termite, Reticulitermes tibalis (Banks), was tested in laboratory and field trials. Termite workers were susceptible to nematodes in laboratory tests, but large numbers of nematodes were required for mortality. LD50 was estimated at 1.5 x 10(4) nematodes per termite in standard filter paper assays. Nematodes were applied to the soil directly beneath baited traps at a rate of 1 x 10(7) per m2 in field trials. There was a significant difference between treated and untreated traps in number of termites per trap, and protection was provided for a period of 2-3 wk. Termites attacking traps on treated sites entered traps at a corner or from the top, suggesting that termites may be avoiding contact with entomogenous nematodes. The reinvasion potential of termites shown in this study suggests that either nematode application should be made frequently or that the entire colony rather than only the feeding site must be treated.
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