Abstract:

Compared with the local single cropping of rice varieties Liangyoupeijiu , Yongyou No.9 has the following characteristics of Diseases and Pests :①Transplanting later avoided the damage caused by the first generation of stem borer, so the first and Second generation of stem borer damage lighter, but because Yongyou No.9 have a longer growth period, the third-generation borer damage is relatively heavy in the heading stage.②The fourth generation of rice leaf roller occurred lighter than Liangyoupeijiu，and the fifth generation take place more than a serious Liangyoupeijiu③The fourth and fifth generation white-backed planthopper and fifth generation of brown planthopper Occurred less , while stem thick,the occurrence of brown planthopper is more serious than Liangyoupeijiu, due to late maturity, also increased the seventh generation of the occurrence damage.④Susceptible to false smut. Against the diseases and insect pests occurring characteristics of Yongyou No.9 , prevention and treatment strategies adjusted as follows:①Relax Yongyou No.9 vegetative growth phase of the prevention and treatment targets, reduce diseases and insect pests prevention and control frequency, protection and utilization of natural enemies in the ecological regulation capability.②According to Break period of weather conditions, make heading stage disease prevention such as false smut.③Do a good prevention and treatment of Borer and Nilaparvata lugens in heading stage, to ensure a good harvest.