代森铵系有机硫杀菌剂，呈弱碱性，渗透力强，具有保护及治疗作用，常用剂型为４５％水剂。近年来在砀山酥梨树上用代森铵防治黑星病效果显著。但该品种对此药反应比较敏感，如使用不当，梨树叶、果即会产生药害。因此，在生长季节使用代森铵时必须注意以下几点。（１）代... Department of ammonium sulfur organic sulfur fungicides, was weakly alkaline, strong penetration, with the protection and treatment, commonly used dosage form is 45% water. In recent years, Dasannsu pear tree with dithionine prevention and treatment of scab has a significant effect. However, the species is more sensitive to the drug response, such as improper use, pear leaves, fruit that will produce phytotoxicity. Therefore, the following points must be observed when using DAF during the growing season. (1) on behalf of ...