1980年,该病在我区晚粳稻上发病面积很大,危害甚重,为之罕见。 一、病症 发病期,一般在8月中旬初见。在8月底至9月上旬出现枯死高峰,死于分蘖及孕穗早期,病株似螟害的“枯心苗”或“胎里死”,轻病株多数在9月中旬后出现,死于抽穗至灌浆期,出现第二个枯死高峰,造成大量的“白穗”或“半饱穗”。后期近似小球菌核病的病株或螟害的“虫伤株”,但剥开茎杆不见菌核或虫孔。 In 1980, the disease in our area late japonica rice incidence of a large area, very serious harm, it is rare. First, the onset of illness, usually in early August saw. In the end of August to the beginning of September, the withering peak appeared, and died of tillering and early booting. The “dead heart seedlings” To the filling stage, there was a second peak of death, resulting in a large number of “white spike” or “half full spike.” Late stage of small ball sclerotinia disease or pest damage “insects strains”, but not stalk peeled sclerotium or wormhole.