How to control weeds, diseases and insect pests by planting summer corn?

How to control weeds, diseases and insect pests by planting summer corn? Please introduce that summer corn is vulnerable to underground pests such as ground tiger before emergence after sowing, and the harm of gray planthopper, Spodoptera litura, golden needle worm, thrips and aphids at seedling stage. Major diseases such as stem rot (bacterial wilt), ear rot, leaf spot disease and southern rust occurred locally at filling stage, and major pests such as corn borer and aphids were seriously harmed. It may also cause maize lodging, lodging and other pests that affect corn yield and mechanized operation. The main weeds in corn field are Magnolia mandshurica, Portulaca oleracea, Euphorbia angustifolia, Chenopodium officinalis, Setaria officinalis, Cyperus roxburghii, amaranth, abutilon and so on. For the prevention and control of these diseases, insect pests and weeds, associate researcher Hao Junjie suggested that first of all, disease-resistant varieties should be selected as far as possible, and then seed coating should be carried out before sowing to reduce the occurrence of diseases and insect pests. For example, seed coating is selected according to local conditions or corn seed coating agent fenazole (15%) or Kefu (25%) is used as seed coating to control underground pests such as small land tigers, grubs, golden needles, etc. Prevent corn stem rot and so on. Chemical weeding can be carried out before sowing seedlings, and the ground is closed with atrazine (40% suspending agent) or atrazine (42% suspending agent) per mu after watering or rain. 50 ml of water is closed to 50 ml of water. The main diseases of maize are stem rot, so we can choose Manshijin, Kesudan and Shileshi for seed coating to reduce the occurrence of the disease. The most harmful pests are gray planthopper, Spodoptera litura and so on. 20 grams of imidacloprid (10% wettable powder) or 20 grams of buprofezin (25% wettable powder) can be used per mu to control gray planthopper and prevent the occurrence of rough shrinkage disease; 500 grams of trichlorfon (90% crystal) per mu, add a small amount of water and 7 kilograms of fried wheat bran or bean cake to form poison bait, sprinkle it among corn lines in the evening to control Spodoptera litura and underground pests. In the small trumpet stage (when the ninth leaf to the tenth leaf unfolds), 1.5% phoxim granules and fine sand are mixed in the proportion of 1 ∶ 5, and then sprinkled into the heart leaves, 1.5 × 2 grams per plant to control corn borer. Click to get more corn planting techniques click to get more food crop planting techniques