A plants’ physiology maybe affected by various pesticides through the activation or inactivation of different biochemical pathways in target and non-target plants. In response to pesticides as xenobiotics, plants activate their antioxidant defense systems through both enzymatic and non-enzymatic pathways. In this study, two of the most common pesticides used to control cucumber whiteflies, imidacloprid and dichlorvos were sprayed on cucumber seedlings. Treatment with both pesticides significantly increased the activity of superoxide dismutase, catalase, ascorbate peroxidase, guaiacol peroxide, and phenylalanine ammonia-lyase. Moreover, total protein, proline, total soluble carbohydrates, and total phenolic content showed a significant elevation in response to the treatment with both pesticides compared to the control. The effects of the separate use of pesticides resulted in variation in the peak day of physiological changes in treated plants. Further experiments showed that pesticide treatment leads to a significant decrease in polyphenol oxidase activity, but no significant changes in contents of hydrogen peroxide, malondialdehyde, and electrolyte leakage index were found. Our results suggest that imidacloprid and dichlorvos had profound effects on the physiological status of cucumber plants at recommended rates. Our data also showed that the responses were similar between the two pesticides with differences in response times following treatment.

通过在目标植物和非目标植物中不同生化途径的激活或失活，植物的生理可能会受到各种农药的影响。作为对农药的异生物素的反应，植物通过酶促途径和非酶促途径激活其抗氧化防御系统。在这项研究中，在黄瓜幼苗上喷洒了两种最常用的防治黄瓜粉虱的农药，吡虫啉和敌敌畏。两种农药的处理均显着提高了超氧化物歧化酶，过氧化氢酶，抗坏血酸过氧化物酶，愈创木酚过氧化物和苯丙氨酸氨裂合酶的活性。而且，与对照相比，两种农药处理对总蛋白质，脯氨酸，总可溶性碳水化合物和总酚含量都有显着提高。单独使用农药的影响导致处理过的植物的生理变化高峰日发生变化。进一步的实验表明，农药处理导致多酚氧化酶活性显着下降，但过氧化氢，丙二醛含量和电解质渗漏指数没有明显变化。我们的结果表明吡虫啉和敌敌畏以推荐的比例对黄瓜植株的生理状况具有深远的影响。我们的数据还表明，两种农药之间的响应相似，但处理后的响应时间有所不同。但过氧化氢，丙二醛含量和电解质渗漏指数没有明显变化。我们的结果表明吡虫啉和敌敌畏以推荐的比例对黄瓜植株的生理状况具有深远的影响。我们的数据还表明，两种农药之间的响应相似，但处理后的响应时间有所不同。但过氧化氢，丙二醛含量和电解质渗漏指数没有明显变化。我们的结果表明吡虫啉和敌敌畏以推荐的比例对黄瓜植株的生理状况具有深远的影响。我们的数据还表明，两种农药之间的响应相似，但处理后的响应时间有所不同。