Pirinç Biti, Sitophilus oryzae (L.), (Curculionidae: Coleoptera)'ye karşı bazı yerel Steinernema feltiae (Filipjev) izolatlarının laboratuar koşullarında değerlendirmesi

Üç yerel entomopatojen nematod (EPN) izolatının (Steinernema feltiae UKK-1, S.feltiae DTK-6 ve S. feltiae UIP-19) Sitophilus oryzae (L.), (Curculionidae: Coleoptera)erginleri üzerindeki etkinliği farklı konsantrasyonlarda (50, 100, 250, 500, 1000 ve 2000 IJs/ergin) laboratuvar koşullarında (25oC ve %65 RH) incelenmiştir. Sitophilus oryzaeerginlerinin ölüm oranları uygulama sonrası 4. ve 8. günlerde kaydedilmiştir. Ölüm oranlarıartan uygulama konsantrasyonlarıyla birlikte artmıştır ve ölüm oranları %7-92 arasındadeğişmiştir. Uygulama sonrası 4. ve 8. gündeki en yüksek ölüm oranları sırasıyla %80 ve%92 olarak gerçekleşmiştir. Laboratuvar çalışmaları test edilen EPN izolatlarının S.oryzae’nin mücadelesinde iyi bir potansiyele sahip olduğunu göstermektedir.

Laboratory evaluation of some native isolates of Steinernema feltiae (Filipjev) against the rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

The efficacy of three native Turkish entomopathogenic nematode (EPN) isolates, Steinernema feltiae (Filipjev) UKK-1, S. feltiae DTK-6 and S. feltiae UIP-19), was investigated against the adults of Sitophilus oryzae (L.), (Curculionidae: Coleoptera) at different concentrations (50, 100, 250, 500, 1000 and 2000 IJs/adult) in a laboratory bioassay at 25oC and 65% RH. The mortality rates of S. oryzae were evaluated after 4 and 8 days of exposure. Mortality rates increased with increasing IJ concentrations and ranged between 7% and 92%. The highest mortality rates at 4th days and 8th days after treatment were 80% and 92%, respectively. These results indicate that the tested EPN isolates have good potential for the control of S. oryzae.

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