To strengthen the prevention and control of diseases, pests and weeds in summer sowing maize
First, the incidence and trends of pests and diseases According to the investigation of the plant and disease prevention and control station bases, the average number of live larvae survived after the winter was 8.7, which was 52.9% and 60.9% lower than last year and the annual average respectively. It is expected that this year's generation of corn borers will occur lightly, with an area of ​​about 30. Million mu, the development progress is close to normal, the egg is in the middle of June; the second-generation armyworm occurs lightly, and the area of ​​occurrence is about 600,000 mu, and the larvae occur in the middle of June; corn seedling blight, locusts, and thrips local Emphasis occurred; moderate occurrence of weeds in corn fields; local turfgrasses occurred lightly, with an area of ​​about 80,000 mu; meadow locusts are affected by adult development status, ecological environment, temperature and humidity, although the number of overwintering adults under lights is high. It will lead to major changes in the area and degree of occurrence of a generation of larvae. Second, prevention and treatment guidance During the three summers, it is a crucial period to prevent the spread and control of various diseases and weeds. In order to ensure the normal growth of spring corn seedlings, the summer maize seedlings will be homogeneous and strong, and the following prevention and control opinions will be put forward in light of the pest base and weather forecast. (1) Choose disease-resistant varieties and do corn seed treatment. In view of the frequent occurrence of diseases and insect pests in summer sowing maize in the region, the selection of resistant varieties such as spot disease, brown spot disease, sheath blight, Curvularia spp., and the rational distribution and implementation of seed coating are effective in preventing and controlling corn seedling blight. It is a simple and easy-to-follow measure for seedling pests such as head smut, smut, cultivating agrimony, ground pests, aphids, and thrips. All districts and counties should seize the key links for planting summer sowing maize in accordance with the characteristics of local diseases and pests, and do a good job in seed coating or seed chemical treatment. The high-quality seed coating agent is used, and the seed and the drug are coated at a ratio of 1:50. The parcel is evenly distributed, and insecticides and bactericides can also be used for seed dressing, which can reduce the damage of pests and diseases and ensure the emergence of a complete seedling and a strong seedling. seedling. (B) timely control of weeds in corn fields. Summer sowing maize can be used for chemical and weeding before and after corn sowing, and the soil can be closed with herbicides such as ethenyl mixture, and the glyphosate herbicide can be used for killing. Maize more weed grass plots, in the corn 5-7 leaf stage (weeds 2-3 leaf period), can choose Yu Nong Le stem and leaf herbicides to control, fresh corn should be carefully selected herbicides. (3) Strengthen the monitoring of pests and diseases at the seedling stage of corn and guide prevention and control. The first is to monitor the generation of corn borer for sweet, waxy corn and early sowing spring corn damage, insist on reducing the population base of a generation of insects, control the second generation of the damage prevention and control strategies, can be in the middle of the middle of the corn leaf, apply Bt granules for prevention and control, Or release Trichogramma to control, Trichogramma released 10,000 per acre. The second is to strengthen inspection and control of the second-generation armyworm. For plots with more than 10 insects per square meter of wheat field, the amount of insecticides can be controlled by adding an appropriate amount of insecticide in combination with the weeding soil. The five plots should be controlled in time. The third is the occurrence of corn seedling blight on the plot, field management should be strengthened, after the rain in time cultivating loose soil, the incidence of heavier land can use carbendazim, triadimefon and other agents for two consecutive spraying control, interval 5 days. The fourth is that for corn larvae and thrips heavier damage to the plots, should use appropriate pesticides in a timely manner to prevent and control, to prevent the occurrence of corn leaf curling and yellowing of leaves. The fifth is to investigate the eggs and larvae of farmland grasslands, eliminate farmland and surrounding weeds, and strive to control their damage before the third instar larvae and before they move into the farmland. Sixth, do a good job in monitoring and prevention of locusts. For the occurrence of bandits in the region, monitoring and routine prevention and control in key areas (reservoir areas, mountain areas) should be strengthened. In late June, the focus of the area was to carry out a unified campaign to combat plague mainly based on biological control. At the same time, we strengthened the training of emergency response teams in the region, actively carried out the emergency stockpile and overhaul of pharmaceuticals, medical equipment, and other emergency supplies, and carried out emergency drills in key districts and counties. Red Ginseng has the functions of invigorating vital energy, nourishing blood, nourishing heart and soothing mind. Red ginseng can regulate the nervous, cardiovascular and endocrine systems, promote the body's material metabolism and the synthesis of protein, RNA and DNA. 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