Biological control protects natural enemies such as frogs and rice field spiders. Feeding ducklings in the southern rice area is better for controlling fly plover. According to the survey in Sichuan, early rice fields in mixed rice areas can be controlled without drugs when the ratio of spiders and planthoppers is 1:4 and late rice fields are 1:8-9. After the early maturing rice is harvested, the grass can be spread in the field, and then shallow water is poured to force the spider to go to the grass and artificially assisted to move to the late mature rice field.
Chemical control
1. Control strategies. With the aim of pest control and disease prevention, the planthopper pods were adopted to control the generation and control strategies of the second generation. In terms of specific practices, wheat fields should be protected and paddy fields should be protected; flood control fields should be used to protect Datian; Grasping the peak of the adult's spread of the first generation and the peak of the second and third generations of nymphs' nesting, they were annihilated in the early days of Putian and Honda to control direct poisoning. White-backed hoppers aim to treat insects and protect seedlings. They have taken measures to suppress the disease and to control the outbreak. The brown planthopper is the target of pest control and panicle cropping. The previous generation of Suizhi was a major factor in the generation of the disease.
2. The control of the object field and application of appropriate period. See pest investigation and forecasting methods.
3. Types of pesticides and their application methods The resistance level of rice planthoppers to organophosphorus insecticides and carbamate insecticides has been increasing year by year, and resistance to pyrethroid insecticides has developed rapidly. If deltamethrin is no longer suitable for pest control in rice fields, it should be used pesticide species that have not yet developed resistance or resistance to slow development, and often pay attention to new pesticides, and constantly change the use of pesticide species. At present, more effective pesticides and application techniques are as follows: 10% imidacloprid wettable powder 150g per hm2, 900kg conventional spray on water. 1d after the drug control effect can reach 71.8%, 27.7% higher than the 51.9% control effect of bufalin, 7 ~ 25d after the drug control effect of 96.1% to 100%, control of damage time up to 30d or more. Imidacloprid against natural enemies in the paddy field, such as spiders, Black-shouldered Blind beak killing force is higher than bufalin, lower than methamidophos. 25% chlorenone WP can be sprayed with 300-450g per hm2, and the control effect is 85.3%-93.92%, and the residual period is more than 30 days. One application can control brown rice borer damage, and it is safer for natural enemies and crops. 25% buprofezin WP, concentration of 125mg/kg and 250mg/kg spray control, within 1 month, can effectively control the white back planthopper damage. 5% of Ruijin Superfine Suspension is 1,600 times, or 25% of bupropion wettable powder, 1,400 times of sprayed oil sand. In the rice tillering stage, the rice fields are divided into small compartments of 1.5 to 2m wide. Every hm2 of 7.5kg of diesel oil mixed with 225kg of fine sand is thrown into the field. The bamboo shoot shoots the seedlings, causing the insects to jump into the water and die of oil. 1d After the oil and water discharged.
Chemical control
1. Control strategies. With the aim of pest control and disease prevention, the planthopper pods were adopted to control the generation and control strategies of the second generation. In terms of specific practices, wheat fields should be protected and paddy fields should be protected; flood control fields should be used to protect Datian; Grasping the peak of the adult's spread of the first generation and the peak of the second and third generations of nymphs' nesting, they were annihilated in the early days of Putian and Honda to control direct poisoning. White-backed hoppers aim to treat insects and protect seedlings. They have taken measures to suppress the disease and to control the outbreak. The brown planthopper is the target of pest control and panicle cropping. The previous generation of Suizhi was a major factor in the generation of the disease.
2. The control of the object field and application of appropriate period. See pest investigation and forecasting methods.
3. Types of pesticides and their application methods The resistance level of rice planthoppers to organophosphorus insecticides and carbamate insecticides has been increasing year by year, and resistance to pyrethroid insecticides has developed rapidly. If deltamethrin is no longer suitable for pest control in rice fields, it should be used pesticide species that have not yet developed resistance or resistance to slow development, and often pay attention to new pesticides, and constantly change the use of pesticide species. At present, more effective pesticides and application techniques are as follows: 10% imidacloprid wettable powder 150g per hm2, 900kg conventional spray on water. 1d after the drug control effect can reach 71.8%, 27.7% higher than the 51.9% control effect of bufalin, 7 ~ 25d after the drug control effect of 96.1% to 100%, control of damage time up to 30d or more. Imidacloprid against natural enemies in the paddy field, such as spiders, Black-shouldered Blind beak killing force is higher than bufalin, lower than methamidophos. 25% chlorenone WP can be sprayed with 300-450g per hm2, and the control effect is 85.3%-93.92%, and the residual period is more than 30 days. One application can control brown rice borer damage, and it is safer for natural enemies and crops. 25% buprofezin WP, concentration of 125mg/kg and 250mg/kg spray control, within 1 month, can effectively control the white back planthopper damage. 5% of Ruijin Superfine Suspension is 1,600 times, or 25% of bupropion wettable powder, 1,400 times of sprayed oil sand. In the rice tillering stage, the rice fields are divided into small compartments of 1.5 to 2m wide. Every hm2 of 7.5kg of diesel oil mixed with 225kg of fine sand is thrown into the field. The bamboo shoot shoots the seedlings, causing the insects to jump into the water and die of oil. 1d After the oil and water discharged.
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