【摘要】 对水稻剑叶鞘褐变组织分离培养,病原形态观察和致病性鉴定,得知致病菌为叶鞘腐败病菌[Sarocladium oryzae(Sawada)W.Gams& D.Hawksw]。其病情指数与瘪壳百分率及谷粒褐变百分率之间成正相关,而与千粒重成负相关。更多还原

【Abstract】 In view of the cultural and morphological characters of the fun- gal isolates and the results of inoculation experiment,the causal or- ganism of rice browned sheath is identified to be Sarocladium oryzae (Sawada)W.Gams & D.Hawksw statistical analysis of data obtained in the experiment demonstrated that percentages of flat kernel and of browned glume were positrvely correlated to the disease indices resulted from the infection of AO—1,AO—2,AO—3,AO—4 AO—5,but the weight of 1000 grains was negatively correlated,i.e. high disease index gave high precentage of flat kernel and browned glume,but the weight of 1000 grains lowered.更多还原