锰锌·乙铝 60 0倍液、 80 0倍液、 1 0 0 0倍液、 1 2 0 0倍液、1 4 0 0倍液均对甘薯黑斑病有一定的防效 ,其中以 60 0倍液 (833ppm)防效最佳 ,80 0倍液次之 ,1 4 0 0倍液最差 ;浸渍锰锌·乙铝溶液 1 0min后 ,用水冲洗对防病效果产生影响 ,使得防治效果降低 ;延长浸渍时间可以提高防效 ,而溶液温度对药效基本上不产生影响 ;用锰锌·乙铝浸苗防治效果很差 ,仅为 1 9 8% ,种薯浸蘸防病效果较好 Manganese, zinc, aluminum and aluminum 60 0 times, 80 0 times, 100 times, 120 times, 1 0 4 times the black spot sweet potato disease have some control, of which 60 0 times the solution (833ppm) the best control effect, followed by 80 0 times, 14O 0 times the worst; impregnated manganese zinc aluminum solution 10min, rinse with water on the prevention effect, making the control effect Reduce; extend the immersion time can improve the control effect, and the solution temperature basically does not have an impact on the efficacy; with Mn-Zn · B aluminum seedling control effect is very poor, only 1.98% it is good