According to the law of occurrence of diseases, pests, and rats in food crops, and the spring weather characteristics of Beijing this year, in order to do a good job of prevention and control work, a planting and seedling preservation is implemented, and efforts are made to seize agricultural harvest throughout the year. The following plant protection measures are proposed. I. Comprehensive prevention and control of spring maize seedling pests and head smut (a) selection of disease-resistant varieties. According to the characteristics of the occurrence of local diseases and pests of corn, the disease resistance is strong and suitable for local planting varieties. The major considerations are anti-maize, leaf spot, brown spot, Curvularia leaf spot, corn head smut, bacterial wilt, and virus disease, especially in the northern mountainous regions. Strong smut varieties are grown. (b) Seed treatment. 1. Control targets: Pests and diseases of corn seedlings, corn smut, head smut, and underground pests. 2. There are two kinds of seed agent treatment methods: seed coating agent coating and drug treatment. (1) Seed Coating Agent: Corn seed coating agent is selected and coated at a ratio of 1:50. (2) Pharmaceutical treatment: 200 ml of 20% triadimefon EC, or 300 g of 12.5% ​​diniconazole WP, or 300 g of 50% Carbendazim WP, per 100 kg of corn seed. Elevate spray evenly. Second, to strengthen the prevention and control of sweet potato diseases (1) Strengthen seedbed management. During the breeding of sweet potato, high temperature seedlings were used to control the development of black spot disease. (B) seedling disease prevention treatment. Take high-cutting seedlings and immersed seedlings. (c) Datian disease prevention. Rotary crops, pharmaceutical disinfection of soil treatment. Third, timely control of wheat pests and diseases (I) The trend of pests and diseases, the overall insect pests are more important than the disease. Among them, wheat aphids will focus on the occurrence, and wheat midge insects and underground pests will be locally emphasized. (2) Main prevention and control measures: In view of the occurrence trend of diseases, weeds and weeds this year, the prevention and control of insect pests at the flooding stage and adult stage and the prevention and control at the spike stage of wheat aphids should be emphasized. Fourth, the rational choice of herbicides to improve the weeding effect (a) Weeding in wheat fields. 1, timely prevention and treatment. The high temperature in spring this year, the return of wheat to early spring, and the rapid growth of weeds, weeding preparations should be made as soon as possible, and stems and leaves should be treated in the spring 2-3 leaf stage of weed seedlings. 2, choose the right herbicide. The herbicides should be selected based on the weed community structure. To see Maitreya, barnyardgrass-based wheat can be used to control 6.9% of the mussels with 50ml, to sow the maternal and amaranth-based wheat can be used 72% 2,4-D butyl ester 50ml, or 75 % Superstar wettable powder 1 - 1.2 grams for prevention. (b) Weeding in spring corn fields. Before the emergence of corn seedlings, a one-time-killing weed control technique is adopted that is a combination of soil sealing treatment and contact and killing of weeds that have been excavated. 1. Soil closure: 36% of Atrazine Suspension and 100ml of 50% Acetochlor EC may be used per mu; or 100ml of 96% Jindul Emulsion 80ml plus 38% Atrazine Suspension; or 40 % Ethanol suspension 300-350 ml. Stem and leaf contact herbicide species and dosage. Each mu can be used with 41% of Dunda water agent 150-200 ml; or 20% of trace water agent 100-150 ml. Method of use: No-tillage sowing of corn on a plot of fine grass, "one-and-one kill" weeding technology; on the rotary plough or no clear corn field, only to take the soil closed treatment. The above-mentioned soil-enclosed herbicides, or stem-leaf contact herbicides are mixed and used in doses of 30-40 kg of water, evenly sprayed on the surface. 2. Stem and leaf treatment: In the corn 5-7 leaf stage (weeds 2-3 leaf stage), the herbicides such as Yu Nongle, 2,4-D butyl ester, Atrazine, etc. are treated with stems and leaves for spray treatment. weeding. How to use: Use 70-100 ml of 4% euronol suspension agent per acre; or 50-70 ml of 4% eugenol suspension concentrate plus 30% of atrazine suspension 100 ml, or 4% of Yu Nongle Suspension 50 -70 ml plus 72% 2,4-D butyl ester cream 30 ml, 30-40 kg of water, spray evenly. Sweet corn or Jingke series should be used with caution, otherwise it is easy to produce unrecoverable deformity, which will lead to a reduction in production. (c) Weeding in soybean fields. Prevention and control of weeds in soybean fields can be done before weeding, soil closing and weeding, and stem and leaf treatment and weeding. 1. Soil sealing: 100-150 ml of acetochlor can be used per mu. 2. Stem and leaf treatment: In the soybean 3 compound leaf stage (weed 3-5 leaf stage), 25% fomesafen 70-90 ml + 5% quizaloxone 60 ml, or 25% Benda can be used per mu. Loose 180 ml + 5% quizalofop 60 ml or 25% Benzonsone 180 ml + 10.8 % high cap 30 ml for stem and leaf treatment. The mixed formulation has slight injury to soybeans and can be recovered later, without affecting yield. Anti-Alcohol Kudzu Flower Extract,Anti-Alcohol Support Extract,Antialcoholic Pueraria Flower Extract,Antialcoholic Ingredients Reed Rhizome Extract NANJING ZELANG MEDICAL TECHONOLOGY CO., LTD , https://www.hawfitness.com