Several control measures of rice stem borer

Rice stem borer, also known as heart borer, heart borer, is one of the main pests harmful to rice, the larvae have miscellaneous feeding habits, but also harm corn, sorghum and so on. Generally, the yield can be reduced by 5-10%, and the yield can be reduced by more than 30%. It is also an urgent matter for insects to seize grain. Several prevention and control measures are introduced for reference only. 1. The selection of excellent rice varieties with strong insect resistance can reduce the occurrence base of Chilo suppressalis. two。 Advocate turning the land in autumn. Through autumn ploughing, the overwintering larvae in rice stubble and weeds in the field can be turned into the soil, thus playing a killing role. 3. Seal and chop in spring. The overwintering of Chilo suppressalis and the treatment of rice straw are also the key suggestions to cut off the source of insect pests. 4. Grasp the reasonable time of medication. Neither too early nor too late, effective measures should be taken when moths are found in the field in late June, such as sand worms and so on. Seize the best application time, neither too early nor too late. 5. Physical control. Light trapping agents can be used for prevention and control. According to the phototaxis of adults, trapping lamps can be installed in places where adults are often active, effectively trapping and killing adults and reducing the number of eggs laid in the same year. Sex attractants mainly kill male moths by synthetic female moth odors to reduce the chance of mating and reduce the hatching rate. 6. Chemical control. The control is an important control measure at present. Generally, 90% insecticidal single wettable powder 900 g / ha can be sprayed with 300kg water; 3.6% Shachongshuang granule is sprayed with 20m / ha 24kg / ha. Pay attention to keep 3m ~ 5cm shallow water for 5 days. 45% Shachongshuang powder 1050-1500 g / ha is sprayed with 300kg water or evenly sprayed with 225,300kg fine soil. Medicament prevention and cure should choose medicament according to local conditions, reduce the frequency and dosage of medicine as far as possible, do the rotation of medicine, slow down drug resistance, and choose the one with low toxicity and high efficiency. 7. Do a good job in field management. Rational application of nitrogen fertilizer to avoid excessive growth of rice and increase the application of phosphorus. Potash fertilizer can promote the robust growth of plants and improve their resistance. The control of Chilo suppressalis is an arduous task. I hope you can get inspiration from it.