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In the present study, the potential of Steinernema feltiae as a biological control agent against cabbage maggot (CM) Delia radicum (Diptera: Anthomyiidae), persistence of the nematode in areas infested by CM larvae, and foraging behavior of the nematode toward CM and/or oilseed rape roots were examined in the laboratory. | İ. A. SUSURLUK Research Article Turk J Agric For 35 (2011) 413-419 © TÜBİTAK doi:10.3906/tar-1002-715 Potential of Steinernema feltiae (Rhabditida: Steinernematidae) as a biological control agent against the cabbage maggot Delia radicum (Diptera: Anthomyiidae) in oilseed rape İ. Alper SUSURLUK*,** Department of Biotechnology and Biological Control, Institute for Phytopathology, Christian Albrechts University, Hermann-Rodewald Str. 9, 24118 Kiel - GERMANY Received: 15.02.2010 Abstract: Entomopathogenic nematodes (EPNs) in families Heterorhabditidae and Steinernematidae have considerable potential as biological control agents against soil-inhabiting insect pests. In the present study, the potential of Steinernema feltiae as a biological control agent against cabbage maggot (CM) Delia radicum (Diptera: Anthomyiidae), persistence of the nematode in areas infested by CM larvae, and foraging behavior of the nematode toward CM and/or oilseed rape roots were examined in the laboratory. The results of the laboratory experiment showed that more than 80% control was achieved against the last instars of D. radicum. Steinernema feltiae persisted in the soil in high numbers for 12 weeks in laboratory assays. The foraging behavior of S. feltiae in the presence of D. radicum larvae and oilseed rape roots, offered individually and in combination, was studied using a Y-tube olfactometer filled with silver sand (Humax® U.K., particle size: 300-400 μm) at 8 and 15 °C. When insect larvae were present, more nematodes migrated toward the larvae at both temperatures. Key words: Cabbage maggot, Delia radicum, efficacy, persistence, Steinernema feltiae, Y-tube olfactometer Kanola bitkisinde lahana sineği, Delia radicum (Diptera: Anthomyiidae)’a karşı entomopatojen nematod Steinernema feltiae (Rhabditida: Steinernematidae)’nin biyolojik mücadele etmeni olarak potansiyeli Özet: Heterorhabditidae ve Steinernematidae familyalarında bulunan entomopatojen nematodlar (EPN), toprak .
