Abstract:

The purpose of this study is to apply the technology of “three prevention and two control” to achieve the goal of simple and efficient control of diseases and pests of ratooning rice. Three treatments were set up in this experiment: “three prevention and two control” treatment, conventional control treatment, and CK (no prevention). And 3 repetitions were conducted to investigate the occurrence of diseases and pests in ratooning rice under different control treatments, as well as ratooning rice yield and yield composition. The results showed that the control effect of “three prevention and two control” was the best, and the control effect on diseases and pests in the first season of ratooning rice was more than 90%, and the control effect in the ratooning season was more than 75%, which were significantly better than those of the conventional control. At the same time, the number of pesticide application was reduced by 2 times, the application of solid pesticide and liquid pesticide was reduced by 65.0% and 46.23%, respectively. Under the “three prevention and two control” treatment, the yield of both seasons was the highest. Compared with those of conventional control, the yield of the first season was increased by 12.05%, the yield of the ratooning season was increased by 56.37%, and the annual yield was increased by 21.14%. The yield of the first season, the ratooning season and the year under the CK treatment were the lowest. The application of “three prevention and two control” technology for diseases and pests of ratooning rice has the characteristics of high yield, high efficiency, cost saving and labor saving, and has a good application prospect.

Key words: ratooning rice, three prevention and two control, simplification, diseases and pests