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Virulence ofPurpureocillium lilacinumstrain ZJPL08 and efficacy of a wettable powder formulation against the Asian citrus psyllid (Diaphorina citri)

文献类型： 外文期刊

作者： Du, Danchao 1 ; Lu, Lianming 1 ; Hu, Xiurong 1 ; Pu, Zhanxu 1 ; Huang, Zhendong 1 ; Chen, Guoqing 1 ; Liu, Shunmin 1 ; Ly 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Zhejiang Citrus Res Inst, Plant Protect Lab, Taizhou, Zhejiang, Peoples R China

关键词： Asian citrus psyllid; entomopathogenic fungi; Purpureocillium lilacinum; Huanglongbing

期刊名称：BIOTECHNOLOGY & BIOTECHNOLOGICAL EQUIPMENT （ 影响因子：1.632； 五年影响因子：2.029 ）

ISSN： 1310-2818

年卷期： 2020 年 34 卷 1 期

页码：

收录情况： SCI

摘要： The Asian citrus psyllid,Diaphorina citriKuwayama, is one of the most destructive pests of citrus and the primary vector ofCandidatusLiberibacter spp., which cause citrus Huanglongbing (HLB). Microbial insecticides based on entomopathogenic fungi are safer alternatives to chemical pesticides. They can mitigate the spread of HLB by suppressingD. citripopulations in citrus groves.Purpureocillium lilacinumstrain ZJPL08, previously isolated fromD.citricadavers, is highly pathogenic toD.citri. We determined the virulence of strain ZJPL08 conidial suspensions and the efficacy of a wettable powder formulation. The LC(50)of strain ZJPL08 againstD.citriat 7 d post-inoculation was 2.11 x 10(4)conidia/mL, and the LT(50)of a 1.0 x 10(8)conidia/mL suspension was 3.14 d in the laboratory. Under the same conditions, the LC(50)of the wettable powder was 1.39 x 10(4)conidia/mL, and the LT(50)was 2.64 d. The corrected mortality caused by the 1500-times diluted solutions of strain ZJPL08 wettable powder inD.citrireached 86.67% at 7 d post-treatment and 100% at 14 d post-treatment under field conditions. Our study revealed that strain ZJPL08 infectedD.citriby hyphae penetrating directly through the cuticle and into the body cavity and tissues. These findings show thatP. lilacinumstrain ZJPL08 has potential for the effective control ofD.citri.

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