At present, with the advent of high temperature weather, rice production has entered the peak period of pests and diseases. Due to the gradual northward migration and proliferation of migratory pests, early rice generally entered the sensitive period of susceptible disease, and most of the rice areas were affected by unfavorable factors such as the rainy season, rice planthopper, rice leaf roller, rice blast, aphid and so on. The risk of major diseases and insects in rice production is increased, and the incidence will increase significantly, and the occurrence will increase. While paying attention to the management of water and fertilizer, rice should also pay attention to strengthening field inspections, timely grasping the occurrence of rice diseases, and timely controlling the use of drugs to suppress the occurrence, development and spread of diseases.
   For major pests, re-emergence areas and critical periods of disasters, it is necessary to strengthen district governance, mainly promote green prevention and control technology, pay attention to safe and scientific medicine, reduce the amount of chemical pesticides, and ensure rice yield, quality and ecological security of rice fields. Prevention and control should grasp the key links, and focus on the protection of flag leaves during the tillering stage of rice, and focus on the prevention of rice blast and aphids during the break period. It is necessary to give priority to green prevention and control technology, vigorously promote physical prevention and control technologies such as frequency-seismic insecticidal lamps and insect attractants, and promote the use of low-toxic and low-residue pollution-free pesticides, and reduce the number of pests and diseases, so that the population of pests and diseases is generally controlled. Below the degree; we must vigorously promote professional and unified defense, improve the technical success rate through professional prevention and control, promote the application of green prevention and control and new technical measures, and achieve low consumption, high efficiency and sustainable control of pest control. In addition, the characteristics of rice field ecology and pests and diseases are very different. Plant protection technicians should go deep into the field, conduct regular surveys, classify and guide, and do in-depth and meticulous technical service work to ensure that various technical measures are in place.
   Chemical control of pests and diseases should pay attention to the following matters: First, timely and symptomatic application. It is necessary to distinguish the pests and diseases with the use of oral medicaments; according to the occurrence of pests and diseases, choose a reasonable time for scientific prevention and control; if the disease is to be selected, the effect of pesticide application and prevention is better in the early stage of the disease, and the pest control should be selected in the larval stage. In this period, pests and diseases are poorly resistant, and the damage caused to rice is also small. Second, pay attention to the method of application. The pests and diseases of the middle and lower parts of rice plants, such as rice stem borer, rice planthopper, and sheath blight, should be directed to the middle and lower part of the rice plant to prevent and control the coarse fog; rice leaf roller, rice blast and other major damage to the leaves and ears of rice plants, etc. The pests and diseases should be directed to the upper part of the rice plant to spray fine mist. Third, we must choose weather medication. In high temperature weather, it is advisable to apply the drug control before 8 o'clock in the morning or after 5 o'clock in the afternoon on cloudy or sunny days to avoid waste of drug evaporation due to high temperature; pesticides cause damage to rice plants; cause pesticide poisoning and other accidents . The specific control measures are as follows:
   For rice blast, 2 to 3 days before the break, 40% per acre with a Fuji EC 75 ~ 100 ml or 100 g of 20% tricyclazole wettable powder, water was added to 75 kg of spray 50, 7 to 10 days Spray again according to weather conditions.
   When the rice plant sheath blight disease rate reached about 15% plexus, immediately with 5% validamycin powder 100 to 150 grams watered 40 kg spray. In addition, 300 grams of "new high-fat film" emulsion per acre , 230 to 250 kilograms of water , 7 to 14 days apart , a total of 2 to 3 times, has a good effect on rice sheath blight.
   For bacterial leaf blight, 20% of leaf green doubles can be used for 100 grams per acre or neomycin candid 10 million units plus water for 35 kilograms.
   Rice in flooded rice and old ward should be treated as key fields.
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