辽北水稻纹枯病和稻曲病防控效应研究

Prevention and Control Effect for Sheath Blight and Rice False Smut of Rice in Northern Liaoning Province

对水稻纹枯病和稻曲病进行了防控效果试验。结果表明,以全防病处理作为对照,产量损失率表现为全不防病>不防纹枯病>不防稻曲病,分别为5.53%,5.11%和2.79%;在孕穗期和乳熟期时,防治纹枯病有助于降低纹枯病的病情指数;不防治稻曲病的穴发病率、穗发病率、结实减退率及产量损失率因品种不同差异较大。生产中应重点对水稻纹枯病和个别品种稻曲病进行防治。

Prevention and control effect for sheath blight and rice false smut of rice were studied. The results showed that prevention in the whole process as a control, the performance for yields loss rate were not all prevention 〉 not prevent sheath blight 〉 not prevent the rice false smut, respectively 5.53%, 5,11% and 2.79% ;prevention for sheath blight were helpful to reduce the disease index at hooting and milk stage.The holes and ears rate of the incidence, seed setting rate of decline and yields loss rate were different due to large differences in different varieties on prevention for rice false smut. Some varieties should be focus on sheath blight and rice false smut in production.