Yerli Diatom Toprağının Sitophilus oryzae (Linnaeus, 1763) (Coleoptera: Dryophtoridae)’ye Karşı Etkinliğinin Araştırılması

Öz

Bu çalışmada, yerli bir diatom toprağı olan Diaterra®’nın, Sitophilus oryzae (Linnaeus, 1763) (Coleoptera: Dryophtoridae), ergin bireyleri üzerindeki insektisidal etkisi, 20 ± 1°C sıcaklık koşullarında galvanize sac yüzey üzerinde değerlendirilmiştir. Denemeler, dört farklı dozda (0.25, 0.50, 1.00 ve 2.00 g/m²) üç tekerrürlü ve üç tekrar olacak şekilde yürütülmüştür. Mortalite oranları 24, 48, 72, 96, 120, 144, 168, 192 ve 216. saatlerde izlenmiştir. İlk 24 ve 48 saatlik uygulama sürelerinde mortaliteye rastlanmamış, ancak 72. saat itibarıyla ölüm kaydedilmeye başlanmıştır. 72. saatte en yüksek dozda %40.21 olarak belirlenen etki aynı dozda 96. saatten itibaren %50’yi aşmıştır. En yüksek ölüm oranı, 2.00 g/m² dozda 216. saatte %83.45 olarak kaydedilmiş olup aynı zaman aralığında diğer dozlardaki mortalite %50’ye ulaşamamıştır. Ayrıca maruz kalma süresinin ölümler üzerindeki etkisini değerlendirmek amacıyla, Diaterra®'nın 2 g/m² dozunda ergin Sitophilus oryzae bireyleri için LT₃₀, LT₅₀ ve LT₉₀ değerleri hesaplanmıştır. Bulgular, özellikle yüksek doz ve uzun süreli temas koşullarında Diaterra®’nın S. oryzae ergin bireyleri üzerinde önemli düzeyde etki gösterdiğini ortaya koymuştur. Ancak, bu etkinliğin daha kapsamlı bir şekilde değerlendirilebilmesi için farklı dozların kullanıldığı ve gerçek depo koşullarını yansıtan daha ayrıntılı çalışmalara ihtiyaç duyulmaktadır.

Anahtar Kelimeler

• Sitophilus oryzae
• Diatom toprağı
• Diaterra®
• insektisidal etki

Investigation of the Activity of Native Diatomaceous Earth Against Sitophilus oryzae (Linnaeus, 1763) (Coleoptera: Dryophtoridae)

Öz

In this study, the insecticidal effect of Diaterra®, a local diatomaceous earth, on adult individuals of Sitophilus oryzae (Linnaeus, 1763) (Coleoptera: Dryophtoridae) was evaluated on galvanized sheet surface at a temperature of 20 ± 1°C. The experiments were conducted in four different doses (0.25, 0.50, 1.00 and 2.00 g/m²) with three replicates and three replications. Mortality rates were monitored at 24, 48, 72, 96, 120, 144, 168, 192 and 216 hours. No mortality was observed during the first 24 and 48 hours of application, but deaths began to be recorded from the 72nd hour onwards. The effect, determined to be 40.21% at the highest dose at 72 hours, exceeded 50% at the same dose from 96 hours onwards. The highest mortality rate was recorded at 83.45% at 216 hours at a dose of 2.00 g/m², while mortality at other doses did not reach 50% during the same time interval. Additionally, to assess the effect of exposure duration on mortality, the LT₃₀, LT₅₀, and LT₉₀ values were calculated for adult S. oryzae individuals at a 2 g/m² dose of Diaterra®. The findings revealed that Diaterra® had a significant effect on adult S. oryzae individuals, particularly under conditions of high dosage and prolonged contact. However, more detailed studies using different dosages and reflecting actual storage conditions are needed to evaluate this effect more comprehensively.

Anahtar Kelimeler

• Sitophilus oryzae
• Diatomaceous Earth
• Diaterra®
• insecticidal effect

Kaynakça

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