TAILIEUCHUNG - Effectiveness of the entomopathogenic nematodes Heterorhabditis bacteriophora and Steinernema feltiae against tenebrio molitor (yellow mealworm) larvae in different soil types at different temperatures
The efficiency of the entomopathogenic nematodes Steinernema feltiae Tur-S3 and Heterorhabditis bacteriophora TurH2, isolated in Turkey, against larvae of Tenebrio molitor L. was investigated in different soil type and temperature conditions. | Turk J Biol 30 (2006) 199-205 © TÜB‹TAK Effectiveness of the Entomopathogenic Nematodes Heterorhabditis bacteriophora and Steinernema feltiae against Tenebrio molitor (Yellow Mealworm) Larvae in Different Soil Types at Different Temperatures Alper SUSURLUK Department of Biotechnology and Biological Control, Institute for Phytopathology, Christian Albrechts University-Kiel, Klausdorfer St. 28-36, 24223 Raisdorf - GERMANY Received: Abstract: The efficiency of the entomopathogenic nematodes Steinernema feltiae Tur-S3 and Heterorhabditis bacteriophora TurH2, isolated in Turkey, against larvae of Tenebrio molitor L. was investigated in different soil type and temperature conditions. Sterilized and non-sterilized silver sand, clay-loam soil, and compost soil were tested, each at 12, 18, and 24 ºC. Temperature had the greatest effect on the mortality of T. molitor larvae caused by both nematode species. The efficiency of the 2 nematodes was greater in sterile than in nonsterile conditions, and was greater in sandy soils than in clay soils. The results showed that Steinernema feltiae was more efficient than H. bacteriophora at all temperatures tested, especially at 12 ºC. Key Words: Biological control, Entomopathogenic nematodes, Tenebrio molitor, Soil type, Temperature Farkl› S›cakl›k ve Toprak Çeflitlerinde Entomopatojen Nematodlar, Heterorhabditis bacteriophora ve Steinernema feltiae‘nin Tenebrio molitor (Sar› Unkurdu)’a Karfl› Etkinli¤i Özet: Türkiye’de izole edilen Steinernema feltiae Tur-S3 ve Heterorhabditis bacteriophora Tur-H2 ›rklar›n›n etkinli¤i, Tenebrio molitor L. larvalar› üzerinde, farkl› s›cakl›klarda ve farkl› toprak tiplerinde belirlenmifltir. Etkinlik; steril ve steril olmayan kum, kumlu-killi ve kompost toprak tiplerinde 12, 18 and 24 ºC’lerde test edilmifltir. S›cakl›k, her iki nematod türünde de T. molitor larvalar›nda ölüm oran›n› önemli ölçüde etkilemifltir. Nematodlar›n etkinli¤i steril kumlu ve kumlu-killi topraklarda, steril .
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