Shahed University

Toxicity of selected plant-derived pesticides to the citrus spider mites (Acari: Tetranychidae) and their predator, Stethorus gilvifrons, in the semi-field conditions

Habib Abbasipour | Amir Hossein Toorani | Behnam Amiri-Besheli

Date :  2021/01/07
Publish in :    International Journal of Acarology
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Keywords :Botanical pesticides; mortality; spider mite; Stethorus gilvifrons; semifield conditions

Abstract :
To examine selective effectiveness of specific pesticides on the citrus spider mites and their predator, we evaluated the contact toxicity of different plant-derived pesticides including dishwashing liquid, Dayabon, Palizin, Palizin + Citrol oil, Tondexir + Bartar soap, cpirodiclofen, spiromesifen, pyridaben, chlorpyrifos-ethyl and abamectin and control on the adult of Tetranychus urticae and Panonychus citri, Panonychus ulmi and their predator, Stethorus gilvifrons in the semi-field conditions. The results revealed that at 24, 48 and 72 h after treatment, Tondexir treatment of 3 ml/L + Bartar 1ml/L had the highest mortality rate on the T. urticae, P. citri, and P. ulmi. This value was 98.13, 84.48, and 80.62, respectively, for 72 h after treatment for these mites. In addition to the mentioned cases, this treatment caused 72.88 mortality in the larvae and 16.13 in the adult predator during 72 h after treatment, while at the same time, the rate of mortality of chlorpyrifos-ethyl and abamectin treatments on ladybirds was 100. The results of this study showed that herbal treatments have a high efficiency for integrated management programmes of the major harmful citrus mites and have little impact on their natural enemies and can replace the high-risk chemical pesticides.

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