STEINERNEMATID AND HETERORHABDITID NEMATODES AGAINST ZABRUS SPP.

Published in Scientific Papers. Series A. Agronomy, Vol. LIX
Written by Ramazan CANHİLAL

Experiments were conducted to find out the susceptibility of the larvae of Zabrus spp. (Coleoptera: Carabidae), an important insect pest of wheat, against entomopathogenic nematodes (Rhabditida: Steinernematidae and Heterorhabditidae) in the laboratory first time in the World. The entomopathogenic nematodes used in the trials were Steinernema feltiae-Commercial, S. feltiae-Endemic, S. carpocapsae, S. bicornutum, Heterorhabditis bacteriophora, and H. indica. Small plastic pots with a lid (8 cm in height, 6 cm in diameter) containing autoclaved soil have been utilized in trials. In the experiments, rates of 50, 100 and 200 infective juveniles (IJs)/cm2 at 15, 20 and 25°C applied and they were repeated 2 times. Raising rate and temperature expanded the mortalities caused by nematodes. S. carpocapsae produced 75% mortality at the rate of 200 IJs/cm2, which was the highest at 15°C. The lowest mortality with 5% at the rate of 50 IJs/cm2 was caused by S. bicornutum 15°C. Steinernema carpocapsae at the rate of 200 IJs/cm2, and S. feltiae-Endemic and H. indica at the rate of 50 IJs/cm2 provided the highest (85%) and the lowest (20%) mortality, respectively at 20°C. At 25°C, S. carpocapsae at the rate of 200 IJs/cm2 was the nematode caused the highest mortality with 95% while S. feltiae-Endemic at the rate of 50 IJs/cm2 was producing 25% mortality which was the lowest. As a result, S. carpocapsae performed the best efficacy against Zabrus spp. and it was followed by H. bacteriophora and S. bicornutum.

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CANHILAL R. 2016, STEINERNEMATID AND HETERORHABDITID NEMATODES AGAINST ZABRUS SPP.. Scientific Papers. Series A. Agronomy, Vol. LIX, ISSN 2285-5785, 247-250.


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