通过病残体土壤接种、病株结实种子传病试验及对严重发病连作田和制种田的玉米疯顶病病情调查表明，玉米疯顶病是由种子传病，病残体不能传病，病株率与种子被害程度及部位呈正相关，重病连作田病情虽有逐年减轻趋势，但病株率仍高于大田种植的４．８倍 Through inoculation of diseased soil, disease-resistant seed-bearing disease test and serious incidence of continuous cropping system and field investigation of maize top disease showed that maize top-off disease is caused by seed disease, disease can not be disease-borne disease, disease The plant strain rate was positively correlated with the degree of seed damage and the location of the disease. Although the incidence of severe disease continued to decrease year by year, the disease strain rate was still higher than that of the field cultivation by 4.8 times