Lethal and sublethal effects of emamectin benzoate on life-table and physiological parameters of citrus red mite, Panonychus citri

文献类型： 外文期刊

第一作者： Khan, Muhammad Musa

作者： Khan, Muhammad Musa;Fan, Ze-Yun;Ali, Shaukat;Qiu, Bao-Li;Khan, Muhammad Musa;Fan, Ze-Yun;Ali, Shaukat;Qiu, Bao-Li;Ali, Muhammad Waqar;Hafeez, Muhammad

作者机构：

关键词： Emamectin benzoate; Developmental duration; Physiology; Oxidative stress; Antioxidant enzymes; Detoxification enzymes

期刊名称：EXPERIMENTAL AND APPLIED ACAROLOGY （ 影响因子：2.132； 五年影响因子：2.196 ）

ISSN： 0168-8162

年卷期： 2021 年 85 卷 2-4 期

页码：

收录情况： SCI

摘要： The citrus red mite (Panonychus citri) is a challenge to manage in citrus orchards due to resistance against several pesticides. There is a necessity therefore to find new pesticides for effective control of P. citri. This study was designed to evaluate the lethal and sublethal effects of emamectin benzoate against P. citri. The results showed that the LC50 of emamectin benzoate to adults of P. citri was 0.35 (0.26-0.43) mg a.i. L-1 and the LC90 was 1.44 (1.16-1.96) mg a.i. L-1. The sublethal concentration exposures (LC10 and LC30) had a significant negative impact on the larval, protonymph, and deutonymph developmental periods. Male longevity was much lower in LC30 treatments than in the controls. Although female longevity was unaffected, the fecundity (eggs per female) was decreased in the sublethal concentration treatments. Results revealed that the adult pre-oviposition period (APOP) and total pre-oviposition period (TPOP) were increased. Other growth parameters r, lambda, and R-0 decreased, whereas mean generation time (T) increased due to pesticide exposure. The survival rate (S-xj), age-specific fecundity and net maternity, life expectancy (E-xj), and reproduction (V-xj) was reduced by LC10 and LC30 exposure. An increase in malondialdehyde (MDA) contents with increasing emamectin benzoate concentration demonstrates that emamectin benzoate induces oxidative stress in P. citri. The activity of antioxidant enzymes (superoxide dismutase, SOD and catalase, CAT) was decreased due to LC30 and LC10 treatments compared to the control. Detoxification enzyme activity (cytochrome P450, glutathione-S-transferases, GST and acetylcholinesterase, AChE) was increased in treated mites compared to the control. This study demonstrates that emamectin benzoate has both a lethal effect on citrus red mite and sublethal effects on its biology and physiology. It is, therefore, potentially an effective pesticide for management of P. citri.

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