Influence of soil on the efficacy of entomopathogenic nematodes in reducing <Emphasis Type="Italic">Diabrotica virgifera virgifera</Emphasis> in maize |
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Authors: | Stefan?Toepfer Benedikt?Kurtz Email author" target="_blank">Ulrich?KuhlmannEmail author |
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Institution: | 1.CABI Europe, c/o Directorate for Plant Protection and Soil Conservation,Hodmezovasarhely,Hungary;2.CABI Europe—Switzerland,Delémont,Switzerland;3.Department for Crop Sciences,University of Goettingen,Goettingen,Germany |
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Abstract: | The use of entomopathogenic nematodes is one potential non-chemical approach to control the larvae of the invasive western
corn rootworm (Diabrotica virgifera virgifera LeConte, Coleoptera: Chrysomelidae) in Europe. This study investigated the efficacy of Heterorhabditis bacteriophora Poinar (Rhabditida: Heterorhabditidae), Heterorhabditis megidis Poinar, Jackson and Klein (Rh., Heterorhabditidae) and Steinernema feltiae Filipjev (Rh., Steinernematidae) in reducing D. v. virgifera as a function of soil characteristics. A field experiment was repeated four times in southern Hungary using artificially
infested maize plants potted into three different soils. Sleeve gauze cages were used to assess the number of emerging adult
D. v. virgifera from the treatments and untreated controls. Results indicate that nematodes have the potential to reduce D. v. virgifera larvae in most soils; however, their efficacy can be higher in maize fields with heavy clay or silty clay soils than in sandy
soils, which is in contrast to the common assumption that nematodes perform better in sandy soils than in heavy soils. |
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