Prevention of planthoppers against corn rough dwarf
2021-06-25 11:02:58
The corn roughage virus is mainly transmitted by Laodelphax striatellus in a persistent manner. In the corn areas where there are few rice fields, when wheat is harvested, it is mainly moved into cornfields and grass weeds to cause harm and overflood. At this time, it is the sensitive period of summer maize, which often causes the occurrence of corn rough dwarfing disease. The first generation of planthoppers is a serious hazard to corn. After the corn and late rice are harvested, they migrate to grasses and weeds. After the autumn wheat emerges, it will transfer to the wheat fields and pass through poisons to injure and overwinter, forming a disease cycle throughout the year.
The rough dwarf disease strains of maize are only dwarfed by l/2-1/3 of the height of the plants, and they can develop after emergence. The occurrence of maize rough dwarfism is entirely caused by the infection of poisonous planthoppers. Therefore, the elimination or prevention of transmission and infection of SBPH is an important way to prevent the occurrence of corn rough dwarf diseases. Therefore, the following measures can be taken. prevention.
1, clear the field weeds. The maize rough dwarf virus is mainly wintered in wheat, grass weeds and slough. Therefore, we must do a good job of preventing and controlling wheat bush dwarf disease, clearing the weeds at the edge of the field, the ground and the ditches, and at the same time reduce the number of populations of the Syrphidae. When spraying, the weeds around the wheat field must also be sprayed, which can significantly reduce the population density. If necessary, 20% of traceless water can be used or 45% of Roundup water can be used for 550 ml/mu, and 30 kg of water. Spraying on the edge of the field to kill the weeds on the field and destroy the living environment of the plant.
2, control wheat field planthopper, reduce transmission media. Winter irrigation in wheat fields and the elimination of winter nymphs in S. sibiricus control the weeds in wheat fields with the use of herbicides such as Dupond Superstars. In early spring, joint control of wheat in wheat joints will prevent and control overwintering adults, and after wheat heading, combined with disease prevention and pest control to prevent the generation of Laodelphax striatellus.
3, adjust the sowing date of corn. In order to avoid the migration peak of Laodelphax striatellus and facilitate chemical control, summer sowing maize should be concentrated in the end of May and early June. It is advisable to plant the seedlings about 7 days before the wheat harvest. Should be sown in advance in early April so as to avoid the peak period of adult overwintering.
4, corn field management. (1) Seed dressing with phosphorus in 0.2% to 0.3% of the seed amount. (2) Before and after corn sowing and at the seedling stage, spray insecticides on corn fields and nearby weeds to control SBPH. The commonly used pharmaceuticals include: 80% dichlorvos EC, 50% phoxim EC; special agents: 2% Indabav (WP) wettable powder, 50% BASA EC. Virus A, disease and disease (3) the incidence of seedling stage, should be timely removal of the diseased plants, brought out of the field burned out, the appropriate time to delay seedlings, and in the corn before the 3-leaf stage with 1.5% of the diseased spirit 800 ~ 1000 times, 20 % A500 spray of virus can effectively reduce the occurrence of diseases. (4) increase organic fertilizer; N, P, K, and reasonable use of micro-fertilizer; timely cultivator loose soil; when the corn grows to 5-6 leaves when the foliar spray, spray Penbao, plant dynamics, etc., Promote the healthy growth of corn, improve the plant's own disease resistance and disease resistance, and control the damage caused by the occurrence of rough dwarf disease to the field.
Corn rough dwarf disease is devastating, and it is difficult to cure once it has occurred. It is not realistic to spray some pesticide on the diseased plants so that it can return to normal. However, as long as agricultural control and chemical control are combined, the ring is tight. Buckle will certainly be able to control its spread.
The occurrence of corn rough dwarf disease is entirely caused by the infection of the poisonous planthoppers, so the elimination or prevention of the spread of the planthopper is an important way to prevent the occurrence of corn rough dwarf diseases. The first serious cause of corn damage is the first generation of planthoppers. Farmers' friends should prevent the occurrence of corn borer and corn rough dwarf disease at the same time and strive for high yield and high yield of summer corn.
The rough dwarf disease strains of maize are only dwarfed by l/2-1/3 of the height of the plants, and they can develop after emergence. The occurrence of maize rough dwarfism is entirely caused by the infection of poisonous planthoppers. Therefore, the elimination or prevention of transmission and infection of SBPH is an important way to prevent the occurrence of corn rough dwarf diseases. Therefore, the following measures can be taken. prevention.
1, clear the field weeds. The maize rough dwarf virus is mainly wintered in wheat, grass weeds and slough. Therefore, we must do a good job of preventing and controlling wheat bush dwarf disease, clearing the weeds at the edge of the field, the ground and the ditches, and at the same time reduce the number of populations of the Syrphidae. When spraying, the weeds around the wheat field must also be sprayed, which can significantly reduce the population density. If necessary, 20% of traceless water can be used or 45% of Roundup water can be used for 550 ml/mu, and 30 kg of water. Spraying on the edge of the field to kill the weeds on the field and destroy the living environment of the plant.
2, control wheat field planthopper, reduce transmission media. Winter irrigation in wheat fields and the elimination of winter nymphs in S. sibiricus control the weeds in wheat fields with the use of herbicides such as Dupond Superstars. In early spring, joint control of wheat in wheat joints will prevent and control overwintering adults, and after wheat heading, combined with disease prevention and pest control to prevent the generation of Laodelphax striatellus.
3, adjust the sowing date of corn. In order to avoid the migration peak of Laodelphax striatellus and facilitate chemical control, summer sowing maize should be concentrated in the end of May and early June. It is advisable to plant the seedlings about 7 days before the wheat harvest. Should be sown in advance in early April so as to avoid the peak period of adult overwintering.
4, corn field management. (1) Seed dressing with phosphorus in 0.2% to 0.3% of the seed amount. (2) Before and after corn sowing and at the seedling stage, spray insecticides on corn fields and nearby weeds to control SBPH. The commonly used pharmaceuticals include: 80% dichlorvos EC, 50% phoxim EC; special agents: 2% Indabav (WP) wettable powder, 50% BASA EC. Virus A, disease and disease (3) the incidence of seedling stage, should be timely removal of the diseased plants, brought out of the field burned out, the appropriate time to delay seedlings, and in the corn before the 3-leaf stage with 1.5% of the diseased spirit 800 ~ 1000 times, 20 % A500 spray of virus can effectively reduce the occurrence of diseases. (4) increase organic fertilizer; N, P, K, and reasonable use of micro-fertilizer; timely cultivator loose soil; when the corn grows to 5-6 leaves when the foliar spray, spray Penbao, plant dynamics, etc., Promote the healthy growth of corn, improve the plant's own disease resistance and disease resistance, and control the damage caused by the occurrence of rough dwarf disease to the field.
Corn rough dwarf disease is devastating, and it is difficult to cure once it has occurred. It is not realistic to spray some pesticide on the diseased plants so that it can return to normal. However, as long as agricultural control and chemical control are combined, the ring is tight. Buckle will certainly be able to control its spread.
The occurrence of corn rough dwarf disease is entirely caused by the infection of the poisonous planthoppers, so the elimination or prevention of the spread of the planthopper is an important way to prevent the occurrence of corn rough dwarf diseases. The first serious cause of corn damage is the first generation of planthoppers. Farmers' friends should prevent the occurrence of corn borer and corn rough dwarf disease at the same time and strive for high yield and high yield of summer corn.
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