The toxicity of the sprayable pheromone for codling moth to Coccinella septempunctata (L.) adults under laboratory conditions

Öz

Abstract: Laboratory studies were conducted to determine the potential toxic effects of the sprayable pheromone for the codling moth (Cydia pomonella (L.)) on adults of the lady beetle, Coccinella septempunctata Linnaeus. No lady beetle mortality was observed at doses up to 0.72 ml/l. A slight mortality effect was observed at the higher doses of 1.44 ml/l (3.3%) and 2.88 ml/l (6.7%) at 24 h after treatment. After 48 h, the mortality rates were more than twice those for 24 h, namely 1.44 ml/l (6.9%) and 2.88 ml/l (13.8%). Increased mortality rates were recorded at 1.44 ml/l (17.2%) and 2.88 ml/l (20.7%) at 72 h after treatment. Labelled doses of 0.18 ml/l and 0.36 ml/l showed very low (3.5%) or no toxicity (0.0%) to adult lady beetles, respectively, at 48 h. At 72 h, doses of 0.18 ml/l and 0.36 ml/l yielded the same results as those obtained at 48 h. These results show that the microencapsulated sprayable pheromone can be safely used for integrated control of C. pomonella.

Anahtar Kelimeler

• Cydia pomonella,lady beetle,pheromone,,toxic effect

Elma iç kurdu püskürtülebilir feromonunun laboratuvar koşullarında Coccinella septempunctata (L.) erginlerine karşı toksik etkisi

Öz

Elma iç kurdu (Cydia pomonella) püskürtülebilir feromonunun Coccinella septempunctata (L.) erginlerine karşı potansiyel toksik etkisini belirlemek için laboratuvar çalışmaları yapılmıştır. Püskürtülebilir feromon uygulamasının 0.72 ml/l dozuna kadar toksik etki gözlenmezken, en yüksek dozlar olan 1.44 (%3.3 ölüm) ve 2.88 ml/l (%6.7 ölüm)’de uygulamadan 24 saat sonra oldukça düşük etki gözlemlenmiştir. Ergin gelin böceklerinde 1.44 (%6.9) ve 2.88 (%13.8) ml/l dozlarında 48 saat sonraki ölüm oranı, 24 saatteki ölüm oranının iki katından fazla olmuştur ancak 0.18 ve 0.36 ml/l etiket dozları sırasıyla düşük (%3.5) veya hiç (%0.0) toksik etki göstermemişlerdir. Benzer olarak uygulamadan 72 saat sonrada yüksek dozlar olan 1.44 (%17.2) ve 2.88 ml/l (20.7)’de yükselen oranda toksik etki kayıt edilmiştir. Buna karşın, 0.18 ve 0.36 ml/l uygulamaları 48 saat uygulaması ile tamamen aynı sonuçları vermiştir. Bu sonuçlar mikrokapsüllenmiş  püskürtülebilir feromonların C. pomonella ile entegre mücadelede güvenle kullanılabileceğini göstermektedir.

Anahtar Kelimeler

• Cydia pomonella,lady beetle,pheromone,toxic effect

Kaynakça

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