Evaluation of the Potential of Fungal Biopesticides for the Biological Control of the Seed Bug, Elasmolomus pallens (Dallas) (Hemiptera: Rhyparochromidae).
作者： Fredrick Fidelis Umaru , Khanom Simarani
关键词: Conidium 、 Biological pest control 、 Metarhizium anisopliae 、 Bioassay 、 Fusarium proliferatum 、 Biopesticide 、 Biology 、 Horticulture 、 Hemiptera 、 Aspergillus flavus
摘要: Elasmolomus pallens is a post-harvest insect pest of groundnuts which causes severe yield loss to farmers, particularly in Africa and Asia. Resistance synthetic chemicals has been on the rise among insects constraint insecticides regulations. In view drive for alternative approaches insecticides, this study evaluated potential biopesticides based entomopathogenic fungi against E. under laboratory conditions. Fungal isolates from bug cadaver including Fusarium proliferatum F1, Aspergillus tamarii F2, A. flavus F3, Trichoderma atroviride F4, niger Metarhizium anisopliae (Meschn.) Sorokin, originating Zonocerus variegatus were screened virulence bug. Adult bugs dipped briefly conidial concentration 1 × 108 mL−1 observed at 25 ± 2 °C, 80 10 RH 14: L:D days. The fungal caused mortality ranging 48 100% their infect kill Five concentrations (1 104 conidia mL−1) adult multiple-dose bioassay. Lethal (LC50 LC90) values 6.75 106 4.42 109 obtained F3 while M. had 8.0 6.14 respectively. time (LT50 LT90) 3.3 6.2 days compared 3.6 5.6 anisopliae, Thus, showed pallens; can be considered as an ideal isolate incorporation into formulations field applications.
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