Farshid Shokouhi-Nia; Ali Mirshekar; Abbas Khani
Abstract
The combination of biological and chemical insecticides is very important to control wheat thrips and reduce the dose of chemical insecticides. Therefore, in this study, insecticidal activity of botanical (Tondexir and Palizin) and microbial pesticides (Bacillus thuringiensis (B.t)) in ...
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The combination of biological and chemical insecticides is very important to control wheat thrips and reduce the dose of chemical insecticides. Therefore, in this study, insecticidal activity of botanical (Tondexir and Palizin) and microbial pesticides (Bacillus thuringiensis (B.t)) in comparison with chemical (Thiacloprid and Thiacloprid+Deltamethrin) insecticides on wheat thrips was investigated. A completely randomized experiment was performed with three replications and five concentrations of each insecticide. Based on the lowest LC50, a chemical insecticide and a botanical insecticide were selected. Their LC15 and LC30 concentrations were combined with microbial insecticide and 48 h later, the mortality was calculated. Mortality increased with increasing concentrations of chemical and botanical insecticides. The lowest amount of LC50 was related to Thiacloprid+Deltamethrin and Palizin which were used in combination with microbial insecticide. The highest mortality (76.67%) was related to the combination treatment of B.t+Thiacloprid+Deltamethrin LC15, which can be recommended after field studies as a alternative of chemical insecticides to protect wheat against thrips.
