In Vitro Pathogenicity of Some Entomopathogenic Fungal Strains against Green Peach Aphid Myzus persicae (Homoptera: Aphididae)

文献类型： 外文期刊

第一作者： Nazir, Talha

作者： Nazir, Talha;Basit, Abdul;Hanan, Abdul;Qiu, Dewen;Majeed, Muhammad Zeeshan

作者机构：

关键词： Beauveria bassiana; Lecanicillium lecanii; Myzus persicae; binary combination; entomopathogenicity; fungal isolates; virulence

期刊名称：AGRONOMY-BASEL （ 影响因子：3.417； 五年影响因子：3.64 ）

ISSN： 2073-4395

年卷期： 2019 年 9 卷 1 期

页码：

收录情况： SCI

摘要： Green peach aphid, Myzus persicae (Hemiptera: Aphididae), is an economically important pest of crops within more than 40 plant families all over the world. This study encompasses in-vitro pathogenicity of two strains of Beauveria bassiana (BB-72 and BB-252) and one strain of Lecanicillium lecanii (V-4) against green peach aphid (M. persicae). Using a leaf-dip method, three different bioassays were conducted comprised of filtrates and conidial concentrations of BB-72, BB-252 and V-4 fungal strains and their binary combinations. Infiltrate bioassays, 2 mL fungal filtrate of each strain was used. In conidial bioassays, three different concentrations (i.e., 1 x 10(6), 1 x 10(7) and 1 x 10(8) conidia mL(-1)) of each fungal strain were used, while in binary combination bioassays, LC50 and LC33 of these fungal strains were evaluated. According to the results, maximum pathogenicity against test aphids was observed at 10th day of all treatments. Both strains of B. bassiana (BB-72 and BB-252) exhibited higher mortality of aphids (up to 95 and 91%, respectively) than L. lecanii (V-4) strain (87%) in all three types of bioassays. Moreover, binary combinations of BB-72 and BB-252 strains showed significantly higher aphid mortality (94%) than other combinations. Reduced mortality in case of fungal combinations of V-4 strain might be due to the antagonistic effect of L. lecanii strain along with both strains of B. bassiana. Nevertheless, evaluation of combined pathogenicity of the fungal strains constitutes the novelty of this in-vitro study which revealed that both strains of B. bassiana (i.e., BB-72 and BB-252) are mutually compatible and can be utilized together as new biocontrol tools against destructive insect pests such as M. persicae.

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