How to manage sorghum seedlings?

How to manage sorghum seedlings? Please give guidance to sorghum seedling management can refer to the following methods for management: 1. Chemical weeding: chemical weeding should be carried out 3 days after sowing, using 3mur3.5 kg of atrazine mixed with 400 rain 500 kg of water per hectare. In case of dry weather, spray water once within two days and wet the ground once to improve the function of weeding. Spray 72% 2.4D-butyl ester to weed, first do a small area experiment, and then use it in a large area. When the seedling height is 3 cm, 2.4D-butyl ester is sprayed 0.75 kg per hectare, but it can only be used in areas with heavy broad-leaved weeds, and coniferous grass must be eradicated manually. 2. Prevention and control of diseases at seedling stage: sorghum rarely occurs disease at seedling stage, and white spot disease occurs in special years. Once it is found that 0.075 kg of zinc sulfate and 0.05kg urea are used for treatment per mu of land. 3. Set the seedling in time, shovel, and topdressing at the right time: in the plot of chemical weeding, the seedlings should be fixed when they have 4 true leaves. Artificial weeding should be done in 3 true leaves of seedlings combined with shoveling. When fixing seedlings, we should pay attention to insect pests and kill insects with methamidophos immediately. After the seedling comes out, use Xiaowu to go deep once, the deeper the better. Use the middle share once after the seedling is fixed. Must be two shovels three times or two shovels four times, combined with big ridge after one fertilizer, 200 kg diammonium phosphate per hectare. 4. Prevention and control of aphids: prevention must be the main way to eliminate aphids. The method is to spray phoxim once at the end of June, using phoxim bottle cap as measuring cup, adding 0.05 kg of diammonium phosphate every 4 cups, 0.05 kg of lobular enemy with 15 kg of water, and 30 kg of water per mu. Dimethoate EC was used for prevention once in mid-July, with dimethoate bottle cap as measuring cup, 4 cups dimethoate plus diammonium phosphate 0.075 kg, Tainong high yield bao 0.05kg mixed with 15 kg water, 30 kg water per mu. One more time in late July, 4 cups of dimethoate plus 0.05 kg of double-effect micro-fertilizer, 0.05 kg of urea with 15 kg of water and 30 kg of water per mu. Prevention should be early rather than late. After entering August, spraying must pay attention to safety in order to prevent heatstroke. Click to get more sorghum planting technology click to get more grain planting technology