How to prevent the damage of corn straw?

How to prevent corn grass damage? Grass damage is one of the factors restricting high and stable yield of maize. Weeds in corn fields in China occur more than 350 million mu all year round, causing about 9.5 billion kg of corn loss every year. According to the weed species and their harm characteristics, comprehensive control strategies should be adopted, which are based on agricultural control, emphasized on chemical weeding, supplemented by manual and mechanical control, and coordinated with various measures, to effectively control the harm of weeds in corn fields. Detoxification weeding before sowing In the plots where weeds sprout more before corn sowing, paraquat, glyphosate, glufosinate and other genocidal herbicides can be used for spraying weeding. After sowing, soil closed weeding before emergence was popularized by using 90%, 99% acetochlor EC, 72%, 96% metolachlor EC, 90% atrazine WG, 38% atrazine SC, 25% thiensulfuron WP, 87.5% 2,4-D isooctyl ester EC, 57% 2,4-D butyl ester EC, 90% acetochlor 96% metolachlor EC +75% thiensulfuron SC, 67% isopropyl·atrazine SC, 40% Acetochlor EC, 50% Acetochlor EC, etc. are sprayed evenly on water after corn sowing and before emergence. 30% one SC, 10% one SC, 4%, 6%, 8% on SC, 90% atrazine WG, 38% atrazine SC, 25% yl bromoxynil EC, ine·atrazine, one·atrazine mixture, atrazine and one, on·yl bromoxynil mixture, corn 3~5 leaf stage, weed 2~4 leaf stage, Spray water evenly. Nicosulfuron can not be used in sweet corn, waxy corn and pop corn fields, can not be mixed with organophosphorus pesticides, can not use organophosphorus pesticides within 7 days before and after application. Directional weeding in the middle and late stages For the germination of weeds in the middle and late stages of corn growth caused by various reasons, 20% paraquat aqueous solution and 25% rimsulfuron-methyl water dispersible granules can be selected for directional spraying between rows of corn. Protective covers should be installed on the nozzles during application to avoid spraying on corn plants to cause phytotoxicity. In addition, special attention should be paid to two points: first, the rational selection of vegetable oil-based spray additives can improve the weeding effect, reduce the herbicide dosage, reduce the spray water consumption, reduce the droplet drift, and be safe for crops. Secondly, according to the characteristics of controlling weeds around corn field, there are many kinds and large occurrence amount of weeds around corn field, including grass weeds, sedge and broadleaf weeds, annual weeds, annual weeds and perennial weeds. Leguminous crops can be planted to inhibit the occurrence of weeds; manual clearance can also be adopted, or the use of glyphosate, paraquat, glufosinate and other inactivating herbicides for control. Click for more herbicide application techniques Click for more pesticide application techniques