农药大田试验示范简结 1.磷酰胺防治小麦锈病试验 1976年组织七个单位联合试验,结果一般都较敌锈钠、氟硅酸效果好。用250倍药液,每亩200斤喷二次(间隔7～10天),防效达95％以上。但今年锈病发生较轻,有些单位防效不够稳定,今后待继续研究。 2.7313、托布津、多菌灵防治甘薯黑斑病试验示范 7313是南开大学元素所1973年合成的广谱性内吸杀菌剂。用7313 1000倍,50％托布津500倍,多菌灵3000倍,浸瓜苗十分钟防治效果都在90％以上。方法是选地面较低处,挖一条沟,宽2尺,长3～6尺,深0.5尺,铺上塑料薄膜,倒入已兑好的药液2寸 Pesticide field trial demonstration summary 1. Phosphoramidite control wheat rust test 1976 organized seven units of the joint test, the results are generally more than the enemy rust sodium, fluosilicate good effect. With 250 times the liquid, spray 200 kg per acre two (interval of 7 to 10 days), control effect of more than 95%. However, the occurrence of rust is light this year, and some units are not stable enough in prevention and treatment to be continued in the future. 2.7313, Tuobujin, carbendazim prevention and control of sweet potato disease test demonstration 7313 is Nankai University element 1973 synthesized broad-spectrum systemic fungicide. With 7313 1000 times, 50% Topaz 500 times, carbendazim 3000 times, leavening melons ten minutes prevention and control effects are more than 90%. The method is to choose the lower ground, dug a ditch, width 2 feet, length 3 ~ 6 feet, 0.5 feet deep, covered with plastic film, poured into a good solution to 2 inches