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五氯酚钠是一种除草、杀菌、杀虫兼具的农药,果农普遍用五氯酚钠与石硫合剂的混合液进行葡萄清园,对防治葡萄黑痘病,炭疽病,灰霉病等有明显效果,但若盲目提高使用浓度,或在葡萄老蔓剥过枯皮后使用,极易产生药害。药害多发生在老蔓上,其症状是:先产生与皮色相近的死斑,大小不等,形状不规则,表面至少有一点伤痕,但没有病原菌,用刀削去皮层,可以看到深褐色死斑透入木质部。阻碍水分养分的输送,削弱树势。防止药害必须注意以下几点:1.选用合适的浓度。五氯酚钠与石硫合剂混合使用时。其浓度
Pentachlorophenol sodium is a herbicide, bactericide, both pesticides and pesticides, fruit pests commonly used sodium pentachlorophenol and lime mixture of grapes Qingyuan Park, the prevention and control of grape anthurium, anthracnose, gray mold Etc. have obvious effect, but if blindly increase the use of concentration, or in the vine after the old vine peeling over the use of skin, prone to injury. The injury occurs mostly in the old vine, the symptoms are: first produce skin spots and similar dead spots, sizes, irregular shape, the surface at least a little scar, but no pathogen, with a knife to the cortex, you can see the deep Brown spots penetrate the xylem. Hinder the transport of moisture nutrients, weaken the tree potential. To prevent injury must pay attention to the following points: 1. Choose the right concentration. Sodium pentachlorophenate and lime sulfur mixture when used. Its concentration