水稻纹枯病综合防治研究Ⅱ．辽宁水稻纹枯病产量损失测评  

Integrated Management of Rice Sheath Blight Ⅱ.Determination of Yield Loss Caused by Rice Sheath Blight in Liaoning Province

作　　者：刘志恒[1] 王小奇[1] 俞孕珍[1] 丁秀云[1] 黄峰[1] 林洪祥[1] 刘桂清 何家树 苏健 郑文华[1] 何素娥 

机构地区：[1]沈阳农业大学,沈阳市辽中县乌伯牛乡农业推广站

出　　处：《辽宁农业科学》1995年第5期3-7,共5页Liaoning Agricultural Sciences

摘　　要：１９９２～１９９４年，分别以水稻辽盐２、辽盐２４１、辽粳５和辽开７９─３为试材，于水稻收获期按纹枯病情分级采集病穗标本，进行产量损失测定。结果表明：水稻穗重和病情严重度呈负相关，病害所致产量损失和病情呈正相关；比较３年４个品种间的测定结果，产量损失和病情的关系趋于一致；初步研究认为，纹枯病２级病情可定为病害损失和防治阈值。Abstract The yield loss of 4 rice varieties,viz.Liaoyan 2,Liaoyan 241,Liaojing 5 and Liaokai 79─3,caused by sheath blight was tested in 1992～1994. The results tested separately in 3 yearstended to the same conclusion:There was a negative correlation between the weight of ears andthe Severity of disease,and a positive correlation between the yield loss and the severity of dis-ease. In addition,We found preliminarily that the grade 2 state of rice sheath blight can be re-garded as the threshold of loss and control.

关 键 词：水稻 纹枯病 综合防治 产量损失 辽宁 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]