Ayşe Nur AYDIN, Rahmi AYDIN, Osman SERDAR

Cyfluthrin, Dimethoate Böcek İlaçlarının Gammarus pulex (L., 1758) Üzerindeki Letal Konsantrasyonlarının (LC50) Belirlenmesi

Bu çalışmada Tunceli Munzur Akarsuyundan elde edilen Gammarus pulex (L., 1758) bireyleri cyfluthrin ve dimethoate etken maddelerini içeren iki insektisitin farklı konsantrasyonlarına maruz bırakılarak, akut toksisite testlerinden LC50 değerleri belirlenmiştir. Çalışma boyunca su sıcaklığı, pH, çözünmüş oksijen gibi parametreleri sürekli kontrol edilerek değişmemesi sağlanmıştır. Yapılan bu çalışmada deneyler 1 litrelik cam akvaryumlarda 0,5 litre su konularak gerçekleştirilmiştir. Her bir konsantrasyon grubu için 10 adet G. pulex bireyi kullanılmıştır. LC50 değerinin belirlenmesi için 24 saatlik periyotlarla canlıların hareketlilik durumları gözlemlenerek kaydedilmiştir. Hareketliliğini kaybetmiş G. pulex’ler akvaryum içerisinden alınıp çalışma dışı bırakılmıştır. Çalışma 3 tekrarlı yürütülmüş olup, dimethoate için LC50 değeri 170,51 ± 8,15 µg/l tespit edilirken, cyfluthrin için LC50 değeri 0,800 ± 0,12 ng/l olarak olarak belirlenmiştir.

Anahtar Kelimeler:

Gammarus pulex, Cyfluthrin, Dimethoate, Pestisit, Akut toksisite

Determination of Letal Concentrations (LC50) of Cyfluthrın, Dimethoate Insecticides on Gammarus pulex (L., 1758)

Keywords:

Gammarus pulex, Cyfluthrin, Dimethoate, Pesticide, Acute toxicity,

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