Introduction to the characteristics of special herbicides for licorice

Herbicide No. 0: the requirement of using time is relatively strict, and the maneuverability is poor. The use of No. 0 herbicide requires that the soil should be flat and the humidity should be high. Generally, it must be used within a few days after watering and before the emergence of weeds after sowing or seedling planting, which can inhibit the germination of weed seeds. The spray must be uniform and the dose must be adequate. Herbicide 0 has no effect on weeds that have germinated seedlings and deep-rooted weeds. The general dosage is: low dose 100 ml per mu, medium dose 150 ml per mu, high dose 200 ml per mu. The water distribution should be determined according to the performance test of the spraying machine, less water can be added when the atomization is good, and more water can be added appropriately when the atomization effect is poor. The amount of water mixed with water is generally 30-50 kg per mu. When spraying, do not repeat, do not miss the spray. Seed weeds can ensure that there are no weeds within 60 days. Herbicide No. 1: herbicide No. 1 has no obvious effect on deep-root and tuber weeds, and can prevent all kinds of weed seeds from germinating and kill small weeds in time. At high doses, it can also kill larger weeds. Both seedlings and seedlings can be used after planting, and the time can be appropriately relaxed. within half a month after watering for the first time, as long as the weeds are in the young stage of 3-5 leaves, they can kill weeds and inhibit ungerminated weeds. Because of the wide use time, the maneuverability is relatively strong. Herbicides sold on the market, with closed function, often can not kill germinated weeds, herbicides with herbicide function often do not have closed function. Herbicide No. 1 has both functions. As long as the dosage is sufficient, the spraying is uniform and the water is reasonable, there can be no weeds for 70 days, and the cost of weeding is greatly reduced. The normal dosage is 70ml per mu of low dose (suitable for sowing or seedling planting, there are no weeds or weeds in the young stage), 100ml of medium dose and 130ml of high dose. When more than 130 ml, there is no experimental data to prove the effects and side effects, but it has been shown to have greater damage even to deep-rooted weeds. Herbicide No. 1 is also safe for licorice. It is recommended to choose to use in the range of 70-130 ml. Similarly, the amount of water mixed depends on the performance of the spraying machine. Herbicide 2: herbicide 2 has a good effect on deep-rooted and monocotyledonous weeds, such as ice grass. If such weeds occur in a large area choose No. 2 herbicide and the effect is remarkable. It can make up for the use of No. 0 and No. 1 herbicides. In general, herbicide No. 2 can not be used when herbicide 1 is used correctly. Herbicide No. 2 must also be used in the seedling stage of 1-3 leaves of weeds, spraying evenly with sprayer, less dosage, slow effect and long action time. Before the emergence of licorice, the dosage is less than 60 milliliters per mu. After licorice emergence, the dosage can be controlled within 40-60 milliliters. Herbicide No. 2 is sensitive to Monocotyledon weeds, but it is also safe to licorice. The above three herbicides are all produced by the National qualified Chemical Research Institute entrusted by the Glycyrrhiza Research Institute, which are in full compliance with the national standards for pesticides, and all growers can rest assured to use them. In the mechanical aspect of spraying, practice has proved that the effect of large machinery is the best, and the hand sprayer often overlaps and omits in practical operation. The most economical and effective way is to use a small four-wheeled tractor, a motorized sprayer pump, and a steel pipe or hard plastic pipe to make a sprinkler. Before spraying perennial licorice, the dry stems of licorice should be removed and the land should be leveled properly. Last year, in the use of herbicides, the overall situation was successful, all weeds in the 3-5 leaves, the effect is generally very good. However, some individual growers reported that the weeding effect was not obvious. The main reason is that the time of medication is too late, the dose is too small, and the timing of weeding is not accurate. Although our herbicides are fully in line with national standards and are produced by qualified National Chemical Research Institute, the product quality is no problem, but it is still in the stage of experiment and trial. Our herbicides are custom-made, for self-use, limited to our order growers, and are not for sale. The stated use regulations shall not be violated by local technical representatives and growers. The main safety problems that should be paid attention to in the use of herbicides are: transportation and safekeeping of herbicides, special transportation and special custody. Herbicides should be properly stored in places where the elderly, children, poultry and livestock are not involved, ventilated and dry. In use, wear plastic gloves and masks to avoid direct skin contact with medicament. after spraying, wash hands and faces with soapy water in time, and spray equipment should be cleaned in time. When conditions permit, the equipment for spraying herbicides can be used separately from other instruments.