1调种单位要把好种薯调入关把好调入种薯质量关,是预防马铃薯黑胫病的关键。目前北方马铃薯制种单位繁多,良莠不齐,种薯质量千差万别。如果调种单位贪图价格便宜,往往容易贪小便宜吃大亏。为提高供种安全系数,调种单位要与北方供种单位签订种薯 1 transfer unit should put a good kind of potato transferred to the customs transferred to the quality of seed, is the key to preventing potato black shank. At present, there are many units for seed production in the north of the country, and the quality of seed potatoes varies greatly. If the adjustment unit covet cheap, tend to be vulnerable to eat big losses. In order to increase the safety factor for planting, the planting unit shall sign the seed potato with the supplier for the north