Greenhouse application of <Emphasis Type="Italic">Steinernema yirgalemense</Emphasis> to control fungus gnats, <Emphasis Type="Italic">Bradysia impatiens</Emphasis> |
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Authors: | A?Katumanyane T?Ferreira Email author" target="_blank">A?P?MalanEmail author |
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Institution: | 1.Department of Conservation Ecology and Entomology,Stellenbosch University,Stellenbosch,South Africa;2.Nemlab,Klapmuts,South Africa |
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Abstract: | Bradysia impatiens Johannsen (Diptera: Scaridae) has recently been identified as a pest, in various greenhouse-cultured crops in South Africa. The control potential for different concentrations of a local entomopathogenic nematode (EPN), Steinernema yirgalemense Nguyen, Tesfamariam, Gozel, Gaugler and Adams, on a natural population of B. impatiens was determined in a cucumber greenhouse. Additionally, the effect of potting media on nematode movement to control an artificial population of fungus gnats was tested. Doubling the EPN dosage, from that recommended by a commercial product (5?×?105 IJs m?2), reduced the fungus gnats significantly after 21 days. The three different types of potting media, consisting of pine sawdust, coco coir, and a mixture of both coir bale and vermiculite, all had a positive effect on the movement of S. yirgalemense. A significant mortality was achieved for the introduced fungus gnat larvae. |
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