茶园使用化学农药防治病虫,是实现茶叶优质高产的重要手段之一,若使用不当,则容易造成药害,以致生长不良,影响产量和品质,甚至引起死亡。药害症状在生产上其药害症状,通常见到的有急性、慢性和残留性3种。急性药害即在喷药后几小时或几天内即可出现明显症状,在叶部表现为叶斑、枯焦、黄化、穿孔、卷叶、失绿、畸形、落叶等;慢性药害主要影响生理活动,生长缓慢、产量降低、产品的风味和质量降低等,如超量喷洒石硫合剂,会使茶叶产生异味;残留性药害是由于残留土壤中农药及其分解产物所引起的,特别是稳定性强的农药,一次用量过多, The use of chemical pesticides to prevent and control pests in tea gardens is one of the important means to achieve high quality and high yield of tea. If used improperly, it will easily cause injury, which will lead to poor growth, affecting yield and quality and even causing death. Symptoms of phytotoxicity in the production of its symptoms of injury, usually seen in acute, chronic and residual 3 species. Acute injury that is within a few hours or days after spraying can be obvious symptoms in the leaves showed leaf spots, Kujiao, yellow, perforation, curly leaves, loss of green, deformity, deciduous, etc .; chronic injury mainly Affect the physiological activities, slow growth, lower yield, lower flavor and quality of the product, such as overspray lime sulfur mixture will make the tea smell; residual injury is due to residual pesticide and its decomposition products in the soil caused, In particular, strong stability of pesticides, an excessive amount,