近年来，花生黄化症大面积不同程度发生，叶片失绿变黄发白，且出现棕褐色斑点，地下部根系细弱，根瘤发育不良，固氮能力减弱，结果因叶落使植株光秆死亡，导致减产，轻者减产30％左右，重者减产达50％以上。一、发病原因1．长期连作：花生产区大部分采用麦垄套种，一年两熟制 In recent years, peanut yellow disease occurs to varying degrees in large area, leaves turn green and turn yellow and whitish, and appear brown spots, the underground root system is weak, the nodules are poorly developed, and the nitrogen fixation ability is weakened. As a result, , Light output reduction of about 30%, heavy output reduction of more than 50%. First, the cause of the disease Long-term continuous operation: Most flower production areas using wheat ridge interplanting, cooked twice a year