Prevention and Control of Diseases and insect pests in Middle and late stage of Rice

This year, rice pests are mainly migratory and boring pests, with an estimated occurrence area of 730 million mu. In the case that a variety of diseases and insect pests jointly affect the middle and late stage of rice, experts suggest that the combination of agro-ecological control techniques and chemical control measures should be used for control.

Agricultural and ecological control techniques: after slow seedling transplanting to before heading, the method of co-cultivation of rice and duck can achieve the effect of grass control, disease prevention and pest control; at the same time, the susceptible rice plants should be pulled out or stepped into the mud in time in the fields with virus disease, tillers and seedlings should be broken, and the seriously diseased fields should be ploughed and replanted in time.

Chemical control: the control of rice planthopper should be carried out by using buprofezin, pyrethrin, pyruvate and other insecticides. for example, when there is no water in the field in the yellow mature stage, when rice planthopper occurs greatly, dichlorvos can be fumigated with poisonous soil; Propiophos and chlorobenzamide should be selected for the control of rice leaf roller; insecticides such as Shachongshuang and Shachongdan can be used to control big borer. During the growing period of middle and late rice, the temperature is high and the sunshine is sufficient, so the field operation should be carried out in the early morning and evening, avoid spraying at high temperature at noon, and do a good job of personnel protection to avoid pesticide poisoning accidents.

In addition, panicle blast is the focus of chemical control, it is necessary to strengthen the protection at the beginning of the break and the full heading stage, and take the initiative to spray 1-3 days before the break. In the future, it will be carried out according to the meteorological conditions, and if the meteorological conditions are suitable, it will be carried out again in the early filling stage. At the same time, if you want to use medicine before the rain, you can choose 80-100 grams per mu or 75% rice (tricyclazole) of 25-30 grams per mu for control. In case of continuous rain, you should also seize the interval between rain stops for emergency treatment.