Laboratory evaluation of some native isolates of Steinernema feltiae against the Rice Weevil, Sitophilus Oryzae (L.), (Curculionidae: Coleoptera)

Öz

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

Anahtar Kelimeler

• Stored product pest
• entomopathogenic nematode
• Sitophilus oryzae
• Steinernema feltiae

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

Öz

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 oryzae erginlerinin ölüm oranları uygulama sonrası 4. ve 8. günlerde kaydedilmiştir. Ölüm oranları artan uygulama konsantrasyonlarıyla birlikte artmıştır ve ölüm oranları %7-92 arasında değişmiştir. 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.

Anahtar Kelimeler

• Depolanmış ürün zararlısı
• entomopatojen nematod
• Sitophilus oryzae
• Steinernema feltiae.

Kaynakça

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