How to control soybean borer?

In recent years, with the increase in the price of soybeans, soybean planting area has increased, which has caused difficulties in agricultural production. Farmers are more popular in planting soybeans. This intensifies the damage caused by soybean borers, and farmers are increasingly concerned with soybean borers. Less prevention and control, even if it is prevented, is also unscientific and results in poor control. The soybean larvae are larvae, and the larvae can bite the pods or drill through the green tender quilts and bite the immature beans. The lighter ones bite into the ditch, which resembles a rabbit's mouth, and eats the soybeans seriously. 1/3-1/2, resulting in incomplete bean pellets. Soybean borer also excreted faeces in the soybean meal, causing the cockroach to be filled with fecal matter of the soybean borer, which severely reduced the appearance and quality of the soybean grain. As the larvae continue to grow, the soybean borer gradually matures. Before the soybeans mature, the borer eats a hole from the edge of the soybean meal, drills it from the pod, leaves the pod, falls to the ground, and enters the soil for winter. Due to the serious damage, it not only reduced the quality and output of soybeans, but also seriously affected the enthusiasm of farmers in planting soybeans. Therefore, this kind of pest control must be given full attention, and comprehensive comprehensive prevention and control measures should be taken to control the damage of soybean borerworm to promote the production and development of soybeans and increase the income of farmers.

1. Use insect-resistant or insect-resistant varieties. The selection of insect-resistant and insect-tolerant cultivars is the most economical method to control soybean borer. However, the insect-resistant cultivars have a certain regionality. Therefore, it is necessary to select the species with low insectivory rate and high yield due to local conditions.

2, a reasonable rotation. Rotation can reduce the rate of insect feeding compared with continuous cropping. For soybeans that are conditionally planted, we must choose at least 1,000 meters above the last year's soybean meal to avoid replanting and culturing. Field management can adopt more cultivating and weeding times, especially in the field. The increase in earthworms and eclosion period will increase the number of adult feathers. Conditional land can be used for water and dryland rotations.

3, deep plowing and turning land. After soybeans are harvested, timely clearing the fields with dead leaves and dead leaves, seize the time for fall tumbling, and destroy the wintering ground of soybean borer, turn the soybean borers that have been drilled into the soil to the topsoil, and perform mechanical damage, sun exposure, wind and rain. , natural enemies, etc., increase the death rate of soybean borer.

4. Release Trichogramma. During the fecundity of female adults of soybean borer, Mu releases 3-5 million Trichogramma bees, usually for the first time in early August, and for the second time around August 10, the number of Trichogramma eggs is 10 Left and right, use pins or paper clips in the field to stick on the upper stems of the plants. Put the Trichogramma plot, increase the amount of bees on the upside of the soybean plot, and reduce the amount of bees on the downside of the soybean plot.

5. Use Beauveria bassiana to fight insects. In early September, the mature larvae of soybean borer were put into soil before use. Each kilogram of Beauveria bassiana added 1 kilogram of ground fine fungus or 10 kilograms of plant ash per acre, and they were evenly mixed with medicinal soil. They were sprinkled on the ridge floor and furrows of the bean field, and they fell to the ground. The mature larvae that will be buried in the soil will be dead after reaching the appropriate conditions of temperature and humidity when they come into contact with the fungus of Beauveria bassiana.

6, dichlorvos fumigation. Fumigation of soybean borer with dichlorvos usually begins at the beginning of the adult's primordial period, which is 1-2 days before the adult's maturity of soybean borer. The signs of the adult moths of soybean borer are: a sudden increase in the number of moths in the field, an increase in the number of moths that fly in groups, and start to see mating. Method of fumigating soybean borer with dichlorvos: cut corn stalks or sorghum stalks into 30 centimeters long, peel one end and leave them at the other end, and keep the quail in the original solution of 80% dichlorvos, 80% diuretic stock solution per acre 100 L, 3 minutes later, it can be used as a drug stick. The unimpregnated end is inserted into a soybean ridge, inserted every 5 ridges, inserted every 5 meters or so, and about 50 sticks per mu are inserted. Or use a wooden stick about 30 centimeters long, one end is tied with a cotton ball, and the dichlorvos liquid is used to prevent and control. Insert the plug according to the above requirements. Maize cobs can also be used as liquid medicine, and the corn cobs that absorb the liquid medicine can be caught on bean pods for prevention and treatment. When fumigating soybean moths with dichlorvos, it is important to note that dichlorvos are a serious cause of sorghum, and the use of dichlorvos in the soybean fields that are interplanted with sorghum or in nearby soybean fields where sorghum is grown must not be used.

7, spraying control. Prevention and control of adult insects and larvae of soybean borer could be carried out within 6 days after the peak period of adulthood. The peak period of adults reached the peak of adulthood within 2-3 days after the beginning of the adult period. Use 25% of enemy milk to kill 20 mu or 50% of forester emulsion milk with 20 liters of water spray or 50% kill pine seed oil with 35 liters of mu and dilute 1000 times spray on water. Can also be used to kill 2.5% emulsifiable concentrate, 30-40 liters of mu or 20% of the speed of extinction killing mutton with 20-30 liters of mu, diluted 1-2 times the water for ultra-low spray control.

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