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Effects of soil moisture, exposure time, nematode age, and nematode density on laboratory infection of Scapteriscus vicinus and S. acletus (Orthoptera: Gryllotalpidae) by Neoaplectana sp. (Rhabditida: Steinernematidae)






Environmental Entomology 18(4): 719-722

Effects of soil moisture, exposure time, nematode age, and nematode density on laboratory infection of Scapteriscus vicinus and S. acletus (Orthoptera: Gryllotalpidae) by Neoaplectana sp. (Rhabditida: Steinernematidae)

Infectivity of an undescribed Uruguayan Neoaplectana species to the mole crickets Scapteriscus vicinus Scudder and S. acletus Rehn and Hebard was tested under a variety of conditions in the laboratory. At 30 degrees C, soil moisture in the range of 5-15% had no effect on infection of the mole crickets. There was no consistent difference in infection of mole crickets exposed to nematode-infested soil for 24 h and those exposed for 72 h. There was no decline in infestion of crickets for the first 7 d after introduction of nematodes into the soil at 30 degrees C, but after 14 d at that temperature, there was significant reduction in infection. Crickets exposed to nematodes at 10 degrees C were infested significantly less often than those exposed at 30 degrees C. Increasing nematode density from 100,000 to 1 million per m2 did not increase the incidence of infection but did decrease the variability of results.

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Accession: 001820053

DOI: 10.1093/ee/18.4.719



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