凋萎型白叶枯病是近几年来发生的一种新的水稻细菌性病害。现将我区1976年冬至1977年春在海南岛育种时对该病的调查、防治、检疫和接种试验情况小结如下,供参考。一、调查和防治情况 1.症状凋萎型白叶枯病从水稻苗期到成熟前均可发生。分蘗期发病多从主茎开始,然后扩展到分蘗。病株一般先在心叶以下的一、二叶上开始表现症状,也有心叶发病的。初期在叶脉 Withered bacterial leaf blight is a new rice bacterial disease that has occurred in recent years. The investigation, prevention, quarantine and inoculation trials of the disease in Hainan Island from the winter of 1976 to the spring of 1977 are summarized as follows for reference. First, the investigation and prevention 1. Symptoms wilt bacterial blight can occur from the seedling stage to mature before. Tillering onset mostly from the main stem, and then extended to tillering. The diseased plants generally begin to show symptoms on the first and second leaves below the heart leaves, and also have the pathogenesis of the heart leaves. Early in the veins