Kamil KARUT, Amir Abdullahi Yousif MALIK

Parasitism of Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae) by Eretmocerus mundus Mercet (Hymenoptera: Aphelinidae) on different crops

Özet: Bu çalışmada Çukurovada yetiştirilen bazı kültür bitkilerinde (hıyar, pamuk,patlıcan ve soya) Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae)nin Eretmocerus mundus Mercet (Hymenoptera: Aphelinidae) tarafından parazitlenme durumunun kafesdenemeleri ile belirlenmesi amaçlanmıştır. Denemeler, Çukurova Üniversitesi, ZiraatFakültesi, Bitki Koruma Bölümü Araştırma ve Uygulama arazisinde bulunan yarı kontrollücam seralarda 2009 ve 2010 yıllarında yürütülmüştür. Denemeler tercihli ve tercihsizolacak şekilde, 4 tekrarlı olarak tesadüf blokları deneme deseninde kurulmuştur. Tercihlitestte, kafes içerisine hıyar, pamuk, patlıcan ve soya bitkilerinin her birinden birer adetyerleştirilmiştir. Tercihsiz testte ise kafes içerisine aynı bitkiden 4 adet yerleştirilmiştir.Bitkilerin 3. yaprağına, klips kafesler yardımıyla 40 adet ergin beyazsinek salınmıştır.Beyazsinek larvaları 2. ve 3. döneme geldiklerinde her kafese 12 adet ergin dişi parazitoidsalınmıştır. Parazitoid salımından 10 12 gün sonra yapılan sayımlarla parazitli ve parazitliolmayan B. tabaci larvaları kaydedilmiştir. Tercihli testte en yüksek parazitlenme oranı %53.4 ile hıyar bitkisinde elde edilmiş, bunu % 38.9 ve % 30.3 ile sırasıyla soya ve patlıcanbitkilerinde elde edilen oranlar izlemiştir. Tercihli testte en düşük parazitlenme oranı % 6.9ile pamuk bitkisinden elde edilmiştir. Tercihsiz testte ise en yüksek parazitlenme oranı %26.6 ile pamuk bitkisinde elde edilmiş, bunu % 21.9 ve % 18.5 ile hıyar ve soya bitkilerindeelde edilen değerler izlemiştir. Tercihsiz testte en düşük parazitlenme oranı % 9.5 ilepatlıcan bitkisinde elde edilmiştir.

Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae) nin f arklı kültür bitkilerinde Eretmocerus mundus Mercet (Hymenoptera: Aphelinidae) tarafından parazitlenmesi

Abstract: The study was carried out in cage experiments in semi- controlled greenhouseat the Department of Plant Protection research area, Agricultural Faculty, ÇukurovaUniversity, Turkey, during 2009- 2010. It targeted determination of parasitism status ofEretmocerus mundus Mercet (Hymenoptera: Aphelinidae) on Bemisia tabaci (Genn.)(Hemiptera: Aleyrodidae) infesting cucumber, cotton, eggplant and soybean crops. The experiments comprised choice and non- choice tests arranged in a randomized block designwith four replications. In the choice test, four plants of different hosts were located in onecage. In the non- choice test four plants of one host were located in one cage. Forty whiteflyadults were released on the 3rd true leaf by using clip cage. Twelve parasitoid females werereleased into the cages when the whitefly larvae reached the 2nd- 3rd stages. After ten daysfrom the release of the parasitoids, parasitized and non-p arasitized whitefly larvae wererecorded. In the choice test, the highest rate of parasitism 53.4% was found on cucumber,followed by 38.9% on soybean, and 30.3% on eggplant. The lowest rate of parasitism 6.9%was reported on cotton in the choice test. In the non-choice test, the highest rate of parasitismwas found on cotton 26.6%, followed by 21.9% on cucumber and 18.5% on soybean. Thelowest rate of parasitism was 9.5% reported on eggplant in the non- choice test.

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