Hasan TUNAZ, Mehmet Kubilay ER, Ali Arda IŞIKBER, Ebru ÇETİNPOLAT, Cebrail BARIŞ

Beauveria bassiana’nın Tribolium confusum (Coleoptera: Tenebrionidae) F1 Larva Sayısına ve Larva Ölüm Oranına Etkisi

Bu çalışmada, Beauveria bassiana enfeksiyonu neticesinde larva ölümleri ve B. bassiana sporlarının bulunması durumunda yeni nesil larva sayıları belirlenmiştir. Larvalar spor ile muamele edilmiş buğdayda bekletilmiş ve ölümler kaydedilmiştir. Uzun süreli denemede, larva sayısı ile ölüm oranları 3 ay sonra tespit edilmiştir. Yedi günde larva ölümü 250 ppm’de %55 ve daha yüksek konsantrasyonlarda %75’in üstünde bulunmuştur. Uygulamalardaki ölüm 14 günde %100’e ulaşmıştır. Erginlerin 14 ve 28 gün sporlu buğdayda bekletilmesi sonucunda 6.3 ve 12 larva belirlenirken kontrolde bu sayı sırası ile 1 ve 6.3 olmuştur. Uzun süreli denemede, kontroldeki, 500 ppm ve 1000 ppm uygulamalarındaki larva sayıları sırası ile 10.3, 42.0 ve 260.3 olarak tespit edilmiştir. 500ppm’de 97.4% ve 1000ppm’de %100 larva ölümü kayıt edilmiştir. Sonuçlar, spor konsantrasyonu artışı ile birlikte B. bassiana uygulamasının T. confusum larva sayısında artışa neden olduğunu; ve ancak konsantrasyon ve süreye bağlı olmakla birlikte B. bassiana uygulamasının yüksek larva ölümlerini sağladığını göstermiş olup, B. bassiana uygulamasının T. confusum popülasyonları ile mücadelede rol alabileceğini işaret etmektedir.

Effects of Beauveria bassiana on Quantity of F1 Larvae and Larval Mortality of Tribolium confusum (Coleoptera: Tenebrionidae)

In this study, larval mortality due to Beauveria bassiana infectionsand the number of larvae produced in the presence of B. bassianaspores were investigated. Larvae were kept in wheat treated withspores and mortalities were assessed. In a long-term experiment,number of larvae and mortality was recorded after 3 months. Within7 days, larval mortality was 55% at 250 ppm and over 75% at higherconcentrations. The mortality reached 100% on day 14 in all fungustreatments. After the adults were kept for 14 and 28 days, 6.3 and 12.0larvae in treatments and 1 and 6.3 larvae in control units werecounted, respectively. In the long-term experiment, number of larvaewas 10.3, 42.0 and 260.3 in the control, 500 ppm and 1000 ppmtreatments, respectively. Larval mortalities were %97.4 in 500 ppmand 100% in 1000 ppm treatments. The results show that althoughB. bassiana treatment increases the number of T. confusum larvae asthe concentration increases, B. bassiana treatment also causes highlevels of larval mortalities depending on concentration and time,suggesting that, B. basssiana treatment can have a role in controllingT. confusum populations.

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