Abstract
The aim of the study was to determine the lethal effect of 1 x 108 conidia mL-1 concentration of local Beauveria bassiana isolates (ET 10, BMAUM-M6-4, Bb 1) against M. persicae under laboratory conditions. For the spraying method, B. bassiana isolates was applied to M. persicae nymphs with a hand spray. In this context, the experiments were carried out in a randomized plots experimental design with ten replicates with ten nymphs in each Petri plate. After the applications, the number of live individuals was recorded by counting the 1st, 3rd, 5th and 7th days and the percentage mortality rate was calculated. On the third and fifth days of the experiment, the highest mortality rates of 64 and 95% were recorded for the Bb 1 isolate of B. bassiana, respectively. In the seventh day counts, 100% mortality rates were determined for Bb 1 and ET 10 isolates and 99% for the BMAUM-M6-4 isolate. In addition, the mortality date (LT50) values were calculated as 3.62 days for ET 10 isolate, 3.60 days for BMAUM M6-4 isolate, and 2.93 days for Bb 1 isolates, respectively. As a result, it is thought that B. bassiana isolates can be used in biological control practices within the scope of integrated pest management program against M. persicae.
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