论文部分内容阅读
作物在生长过程中发生病虫草害后,施用化学农药进行防治是主要措施之一,但若施用农药不当,常会产生药害影响作物的正常生长。农药对作物的伤害,在不同的部位有不同的症状,叶部出现斑点、穿孔、烧伤、卷叶、枯萎、落叶等;果穗上出现果斑、果畸形、落花落果等;另外,植株还会出现花枯焦,根系粗短发脆,甚至变色腐烂,茎秆弯曲等症状。 化学农药对作物的药害,一般可分急性和慢性
After the pests and diseases of crops occur in the growth process, the application of chemical pesticides is one of the main measures to prevent and control, but if pesticides are applied improperly, they often produce phytotoxicity affecting the normal growth of crops. Pesticide damage to crops in different parts have different symptoms, leaves appear spots, perforation, burns, curly leaves, withered, deciduous, etc .; fruit appear on the spot, fruit deformities, falling flowers and other fruits; In addition, the plant will There flower Kujiao, crisp roots crisp, and even discoloration of color, stem bending and other symptoms. Chemical pesticides on crop injury, generally can be divided into acute and chronic