Abstract
Bacillus thuringiensis (Berliner) (Bacillales: Bacillaceae) is able to exhibit highly spesific toxic effect against pests belonging to different orders. The aim of this study is to determine toxic effects of some of the native B. thuringiensis isolates obtained from fig related areas of Aydin province in 2008 on the Tetranychus urticae Koch (Acarina: Tetranychidae), Ceroplastes rusci L. (Homoptera: Coccidae) and Ceratitis capitata (Wiedemann) (Diptera: Tephritidae). For this purpose, the effects of spore-crystal mixtures of 31 native B. thuringiensis isolates against T. urticae nymphs were investigated. It was found that 42% of the isolates caused mortality between 16% and 30%; however, 58% of the isolates resulted in less than 15% mortality. In addition, the effects of spore-crystal mixtures of 35 native B. thuringiensis isolates were examined on nymphs of C. rusci. Even though 14% of the isolates exhibited less than 12% mortality, no toxic effect was observed for 86% of the isolates. Finally, the spore-crystal mixtures of 24 native B. thuringiensis isolates were tested against the larvae of C. capitata. It was found that nearly all isolates did not show any toxic effects on C. capitata larvae. These results show that some of the B. thuringiensis isolates may have potential to develop biopesticides to retard the nymphal growth of especially T. urticae.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
