First, the implementation of chemical weeding can be used before sowing, the use of 50% acetochlor EC 100 ~ 120 ml or 40% Ethylhydrazine 150 ~ 200 ml spray 30 ~ 50 kg of water on the ground. Post-emergence stem and leaf treatment, can use 4% Yu Nong Le plastic suspending agent 75 ml stem and leaf spray, or use 20% gram of trace water agent 120 ~ 150 ml to water 30 ~ 50 kg in corn seedling height 30 cm or more When directed spray control, be careful not to spray on corn, and have good control effect on broadleaf weeds and grass weeds. Second, the phased pesticides control pests and diseases 1. Sowing period. Maize rough disease is a viral disease transmitted by Laodelphax striatellus. It is necessary to adhere to the principle of pest control and disease prevention, and strive to eliminate the transmission of poisonous insects before the transmission of poison. The wheat aphid and the gray planthopper can be treated with 10% imidacloprid 10g spray, or 25% of the cockroach cockroach can be added to the wheat cockroach control agent. On corn, one must be seeded or coated with a systemic insecticide, and can be seeded or coated with a 70% high seed amount of 0.6. Second, before the emergence of the medicinal control, can be controlled with 10% imidacloprid 10g spray, the nymphal nymphs can be controlled with 25% of the cockroach cockroach 20g, while paying attention to the field and ditch spraying. The third is agricultural control. Weeding in the field and around the corn before sowing to reduce the source of insects. Appropriate adjustment of corn sowing date, so that the corn seedling period missed the booming period of the gray planthopper. Remove the diseased plants in time. Seedling blight is a fungal disease caused by Fusarium. It can be prevented by seed dressing with 2% rickett or 50% carbendazim at a seed rate of 0.2%. Head smut is mainly infested in the seedling stage of maize, and can be prevented by seed dressing with 0.2% and 0.5% of seed amount by 2% rickett or 20% rust. The underground pests can be treated with 40% methyl isoflavone according to the seed amount of 0.2%, and the pests such as the gray planthopper and the cockroach species can be treated. A coating agent containing the above active ingredient may be used. 2. Seedling period. Corn borer can be applied to the heart leaf with 250 grams of 3% phoxim granules per acre plus 5 kg of fine sand. The second-generation armyworm and corn thrips can be sprayed with 50% phoxim 1000 times solution or 80% dichlorvos EC 200 times solution, and treat corn borer and rare snow moth. 3. Spike period. The ear stage is the prosperous period of various pests and diseases. Control of Curvularia leaf spot can be sprayed with 50% chlorothalonil, 50% carbendazim, 70% methyl thiophanate 500 times solution; 40% gram of sputum, 50% carbendazim, 75% generation Spray 500-800 times of the agent such as Mn. Brown spot disease can be controlled by spraying with 50% carbendazim and 70% methyl thiophanate 500 times. Removal of old leaf disease leaves can reduce the source of bacteria and reduce the humidity in the field. In the early stage of corn rust, 20% powder rusting emulsifiable concentrate can be sprayed with 75-100 ml per acre. Corn ear worms can be controlled by 90% trichlorfon 800 times droplets. Corn glutinous rice can be sprayed with 50% chlorpyrifos 8 to 10 grams per mu or 10% imidacloprid 10 to 15 grams per acre to 45 kilograms of water spray. Three generations of armyworm can be sprayed with 50% phoxim 1000 times solution. Shanghai J.Shine Co.,Ltd , https://www.jshinechem.com