Corn field chemical weeding technology
At present, it is a critical period for chemical weeding in corn fields in our county. In order to guide the county's general peasant science to carry out chemical weeding, and on the basis of summarizing the scientification of grassroots people, we wrote this article, which is only for the practice of the majority of farmers in the county. In the reference. The weeds in the corn field generally have the following characteristics: First, weeds in corn fields grow fast and concentrated. When soil moisture is good, about 10 days after sowing, the emergence of weeds reaches a peak, and the emergence rate reaches about 90% in 15 days. In case of rainfall or watering, a small peak appears in 4 days. The second is the rapid emergence of grass weeds and the slow emergence of broadleaf weeds. The third is the slow emergence and long time of drought. The prevention and control must be based on the corn planting methods and the habits of the people, adapting to local conditions, and scientific prevention and control. First, "pre-emergence seedling" weeding technology At present, corn planting in our county is plowing method. It is possible to use the amide-based pre-emergence soil treatment agent such as alachlor, acetochlor, and metolachlor to conduct soil treatment before seeding, so it can be used as an ideal herbicide. effect. Second, "post-emergence stems and leaves" weeding technology In the corn 5-7 leaf stage (weeds 2-3 leaf stage), the herbicides such as fenoxaflorone, nicosulfuron, atrazine, etc. are treated with stems and leaves for spraying and weeding, ie, "post-emergence shoots and leaves" treatment. weeding. The susceptibility of different maize varieties to “stem and leaf†treatment agent is different. The order of safety is dentate>hard grain type>burst corn>sweet corn. Generally, the corn is sensitive before and after the ten-leaf stage and should be avoided. use. During the 4-6 leaf stage of maize or a few days after dragging, all weeds in the corn field were controlled using protective spraying and directional spraying techniques. The agent is used as a non-killing contact-type stem and leaf treatment agent. Do not spray on the corn leaves when using, and spray evenly at the same time. Third, pay attention to matters 1, the correct choice of corn herbicides. According to the type of weeds in the corn field, combine the use of methods to purchase herbicides on the road. 2, using the correct application of technology. Accurately calculate the dosage based on the area of ​​the corn field. Spraying should be done evenly when spraying, no heavy spray, no leaking spray. The sprayer nozzle is best to use a fan-shaped nozzle, so that the liquid spray uniform. 3, determine the dosage according to soil moisture. Poor soil moisture, not only to increase the amount of water, but also the amount of drug use recommended dosage limit, but can not arbitrarily increase the dosage, so as not to produce phytotoxicity. In the case of poor soil moisture, it is necessary to pay attention to the timely application of sprinkler irrigation. 4. Determine the dosage based on soil texture and organic matter content. Soil with fertile soil and high organic matter content. Use high amounts of herbicides within the recommended dosage range. Sand plots, soils with low soil and low organic matter content are selected in low quantities. 5, choose the best timing of application. Maize sowing and seedling stage are in the hot season. The spraying should be before 10 o'clock in the morning and after 4 o'clock in the afternoon to reduce the volatilization of the liquid and to facilitate the absorption of the soil and weed stems and leaves, and improve the weeding effect. In addition, windy weather can not be applied, to avoid misty droplets, uneven application, reduce efficacy, but also produce phytotoxicity to other crops around. Omega-3 Refined Fish Oil,Omega Refined Fish Oil,Refined Fish Oil 30/20Tg,Refined Fish Oil ZHOUSHAN SINOMEGA BIOTECH ENGINEERING CO.,LTD , https://www.sinomegabiotech.com