tailieunhanh - Evaluation of entomopathogenic fungi against the sycamore lace bug, Corythucha ciliata (Say) (Hemiptera: Tingidae)

The sycamore lace bug, Corythucha ciliata (Say) (Hemiptera: Tingidae), is one of the most destructive pests of plane trees (Platanus spp.) worldwide. This pest is a major nuisance in Europe since plane trees are very popular in parks. | Turkish Journal of Agriculture and Forestry Turk J Agric For (2013) 37: 595-603 © TÜBİTAK doi: Research Article Evaluation of entomopathogenic fungi against the sycamore lace bug, Corythucha ciliata (Say) (Hemiptera: Tingidae) 1,2, 1 1 1 1 Ali SEVİM *, İsmail DEMİR , Emine SÖNMEZ , Seda KOCAÇEVİK , Zihni DEMİRBAĞ 1 Department of Biology, Faculty of Science, Karadeniz Technical University, Trabzon, Turkey 2 Department of Environmental Engineering, Faculty of Engineering and Architecture, Ahi Evran University, Kırşehir, Turkey Received: Accepted: Published Online: Printed: Abstract: The sycamore lace bug, Corythucha ciliata (Say) (Hemiptera: Tingidae), is one of the most destructive pests of plane trees (Platanus spp.) worldwide. This pest is a major nuisance in Europe since plane trees are very popular in parks. Thirteen entomopathogenic fungal strains including 4 isolates of Beauveria bassiana, 2 isolates of Beauveria pseudobassiana, 6 isolates of Metarhizium anisopliae, and 1 isolate of Isaria fumosorosea were screened against adults and nymphs of C. ciliata under controlled laboratory conditions in order to test their efficacy and search for an effective and safe biocontrol agent strategy. Each isolate was applied with a conidial concentration of 1 × 107 conidia mL–1 to adults and nymphs of the pest. B. bassiana isolate KTU – 24 showed the highest mortality for both adults and nymphs with 86% within 2 weeks after inoculation. This isolate also caused the highest mycosis for adults and nymphs with 83% and 80%, respectively. Mortalities of the other fungal isolates ranged from 43% to 86% and from 36% to 73% for adults and nymphs. Therefore, B. bassiana KTU – 24 was selected for further dose mortality tests based on its high virulence and mycosis value. Dose– response mortality bioassays using 5 different concentrations (1 × 104, 1 × 105, 1 × 106,