In recent years, chemical weeding has been widely applied in wheat production due to its characteristics of low investment and labor saving. In order to improve the application of herbicides, the following issues must be noted:
First, choose the right herbicides on the road according to the wheat field after weeds and wheat field weed species (monocotyledonous weeds, dicotyledonous weeds), the use of high-efficiency herbicides for the rear rake crops is absolutely safe. The more monocotyledonous weeds should be selected to kill monocotyledonous herbicides. Dicotyledonous weeds should be selected to kill herbicides dominated by dicotyledonous weeds. The dicotyledonous weeds were used in 10 acres of 10% methamphetamine or 15% of superstars. Monocotyledonous weeds in wheat can be used in 3 mu of 30 ml of 30% Shima oil suspension, 50 to 100 ml of adjuvant, 7 to 10% of tigers, and 2 to 3 grams of tigers, and 40 to 50 kilograms of water can be used to control stem and leaf spray. .
Second, timely removal of prevention and treatment time: 3 to 6 leaves of wheat seedlings, weeds 2 to 6 leaf stage, weeds basically the sooner the better. Herbicides are applied after the year, and the herbicide age is large, and the application of the herbicide can only inhibit the growth of weeds and make it difficult to kill the weeds. In addition, the application of herbicides at night has a large residual amount, resulting in different crops and the environment. Degree of pollution. Before the application of pesticides, wheatgrass had a small control effect, and it was more labor-saving than years later, thus reducing wheat production costs and reducing pollution.
Third, the key to the scientific application of herbicides is to use drugs uniformly, the correct method and dosage of herbicides. After selecting the herbicides, they should be sprayed at a sunny noon temperature above 5°C. The secondary dilution method is used when applying pesticides, and water consumption can be increased for low humidity fields.
Secondary dilution method Operation steps: First, add a small amount of water to the mother liquor, and then pour it into a sprayer containing a certain amount of water. Then add the amount of water to be added, stir it while stirring, mix thoroughly and dilute to the required concentration. Do not add water after pour the medicine first, so that the medicine is easily deposited at the suction pipe of the sprayer, so that the concentration of the liquid that is sprayed first is high, and it is easy to produce phytotoxicity. The concentration of the liquid after spraying is low, and the weeding effect is poor. It is also not allowed to pour the medicine into the sprayer containing a lot of water, so that the WP tends to float on the water meter or form a small piece, and the distribution is not uniform, which can not only ensure the effect but also easily clog the spray hole during spraying. In addition, the liquid must be prepared with clean water.
According to the survey, many farmers use less water, only 15 to 22 kilograms per mu water (a sprayer), because of the small amount of water, spray faster when spraying, resulting in missing spray, affecting the overall weeding effect. Water consumption per mu is generally 30-45 kg, so as to ensure good control effect.
In this category, you will find test tube and stand in many various sizes and variations. For laboratory work, Test tubes and Test tube racks is an essential element of all labs. Test tube racks allow the test tube to be securely held upright so that nothing can run out while filling the tubes.
Measuring cup is another one of the basic consumable container in lab. Except Test tube racks, Yingmed also supply other lab device holder like Stand base, Lab Jack, Pipette Stand and Laboratary Clamp in this category. If you can not find the one you need, please contact our customer services for more details.
Test Tube And Stand,Test Tube Rack,Test Tube Holder,Test Tube Stand
NINGBO YINGMED MEDICAL INSTRUMENTS CO.,LTD , https://www.chinayingmed.com