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由于多年连作,棚室病原菌的抗性不断提高,黄瓜病害日趋严重,一般菜农治病心切,频繁进行高浓度喷药,因而极易发生黄瓜药害。药害发生机理,是药剂微粒直接堵塞叶表气孔、水孔或进入组织里堵塞细胞空隙,使植物的蒸腾、呼吸和光合作用受阻,或是药剂进入植物细胞或组织后,与一些内含物发生化学反应,产生有霉物质,使正常的生理功能和新陈代谢受到干扰,从而表现出一系列生理病变和组织病变。以至外部形态上出现特异性反常症状。
As a result of many years of continuous cropping chamber pathogens continue to increase resistance, cucumber disease is becoming more serious, the general vegetable farmers eager to frequent high concentrations of spraying, and thus prone to cucumber injury. The mechanism of phytotoxicity is that the drug particles directly block the leaf stomata, water holes or block the cell voids in the tissue, which hinders the transpiration, respiration and photosynthesis of the plant, or after the drug enters the plant cell or tissue, A chemical reaction, resulting in mold material, so that the normal physiological function and metabolism are disturbed, which showed a series of physiological and histological lesions. As well as the appearance of the appearance of specific abnormal symptoms.