Evaluation of the pathogenicity of some entomopathogenic fungi against Tomato leaf miner Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) larvae

Authors : Tadesse Kebede DABSU, Orkun Barış KOVANCI

Pages : 103-117

Doi:10.31019/tbmd.1112324

View : 42 | Download : 7

Publication Date : 2022-12-09

Article Type : Research Paper

Abstract :The current study was initiated to test the pathogenicity of entomopathogenic fungi against Tuta absoluta. The experiment was conducted at Bursa Uludag University, Horticulture Department glasshouse in 2020/2021. Tuta absoluta adults were collected and larvae were reared on tomatoe seedlings in a growth chamber. Then, ten larvae were treated with each isolate at five inoculum suspension concentrations in a factorial experiment arranged in a completely randomized block design with three replications. The analysis of variance for mortality revealed significant variations insert ignore into journalissuearticles values(p<0.05); among isolates and concentrations. Metarhizium anisopliae Ak-12 caused the lowest mortality of 80.77% but had the highest LC50 insert ignore into journalissuearticles values(2.3x108); and the longest incubation period LT50 4.9 and LT90, 9.9 days and considered to be less pathogenic. Whereas Beauveria bassiana Ak-10 showed the highest mortality 91% and the lowest LT50, 4 and LT90, 7.6 days at 1×1010 conidia /ml, followed by Beauveria bassiana Ak-14 and is considered the most aggressive. Conidia concentrations of 1x109 and 1x1010 conidia/ml were the most effective while 1x106 conidia/ml was the least effective. Overall, the current work revealed the potential variation among isolates and concentrations on the mortality of T. absoluta larvae.
Keywords : Tuta absoluta, Metarhizium anisopliae, Beauveria bassiana, Domates, Biyolojik mücadele

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