Fragrant monkshood, also known as sedges, dry triangular, thunder gong, etc., is listed as the world's top ten malignant weeds, is a perennial herb, has amazing reproductive ability, widely distributed in most parts of China, for this weed The main points of the prevention and control, a brief explanation here, I hope to bring you some help.
1. What is the harm of Xiangfuzi
Xiangfuzi is composed of underground tubers, rhizomes, bulbs and above-ground stems and leaves. Tubers, rhizomes, bulbs and seeds can all reproduce. In the growing season of weeds, seedlings can emerge in 2 to 3 days. When conditions are right, seeds and rhizomes can germinate and generate new plants or tubers. New tubers germinate young grass, plant after plant, growing continuously. If the control is not root eradication, the aerial part is gone, but the underground part will continue to grow, and the original plant height can be reached in about 7 days. Because the fragrant tuber roots are very difficult to remove, the key to weeding is root killing.
2. Preventive measures
This is often the case when farmer friends use herbicides to control fragrant monkshood. The ground has not yet died, and some new shoots have grown on the underground tubers. Therefore, the most difficult to remove is the tuber root, and the key to weeding is also rooting. This requires herbicides with strong systemic conductivity, such as glyphosate, glufosinate, clopyrsulfuron, and trifluorosulfuron. Throat and so on. The control effect will be good after the incense monkshood comes out. The disadvantage is that it usually takes about 10 days to see the effect during the control. At the same time, it will face the problems of competing with crops for fertilizer, water and nutrients.
In practical applications, friends can adopt a combination of chemical control and artificial control to achieve the purpose of eradication of monkshood.
Manual control methods:
The first is to concentrate some of the fragrant monkshood and mainly rely on tuber propagation. It can be combined with cultivated land or plowing soil to manually pick up the tuber of the fragrant monkshood in the soil and take it out of the field to dry and burn, which can effectively reduce its tuber reproduction And hazards;
Secondly, by the flowering and seeding stage (before the seeds are immature) of the adult monkshood of July-August, the whole plant is removed or the stems and inflorescences of the aerial part are cut off to reduce the seed landing and reduce the harm by seed propagation.
If it is one's own one-third of an acre, it can be completely excavated by hand, and the monkshood can be completely removed in 2 to 3 years.
Medicament prevention methods:
1. Corn
Dimethyltetrachloro: Dimethyltetrachloride generally exists as sodium dimethyltetrachloride and dimethyltetrachlorodimethylamine salt. Generally speaking, dimethylamine salt is much safer. We generally recommend using it on corn 5-6 leaves. Early use will cause phytotoxicity, and use after corn jointing will affect corn yield.
Benzopine: It is generally used when the corn has 4-6 leaves. This product has a good effect when the temperature is high and poor when the temperature is low. It is used with caution in years of excessive rain or drought. The herbicide is very safe for subsequent crops.
Dimethoxone: Dimethoxone is generally used after 5 leaves, and it has a good effect on monkshood and other broad-leaved grasses. Note that high temperature will cause phytotoxicity, 3 leaves before use will have phytotoxicity. A single dose of chlorfenapyr can be used in 3-5 leaves, which can solve some weeds that nicosulfuron and mesotrione can not solve.
Clopyrsulfuron: This herbicide is generally used after 3-5 leaves of corn. It has a good effect on broadleaf grass and sedge. It is relatively thorough. Generally, the speed of dead grass is slow. In many cases, it takes more than half a month to die grass. Thoroughly, it is not recommended to mix it with fast-acting metformin to avoid antagonism.
Glyphosate: After 10 leaves of corn, when the corn is more than half a meter, you can use glyphosate (glyphosate without other ingredients) to spray the weeds with water, pay attention to the directional spray, do not spray on the corn, weeding The principle is to use the difference between weeds and crops.
2. Orchard
Orchards are generally recommended to use dimethyl chlorpyrifos, glyphosate, and glufosinate directed spraying, pay attention not to spray on fruit trees.
The above are the reasons why Xiangfuzi is difficult to prevent and prevent and its control measures. It is important to remind everyone that if fragrant aconite grows a bulb, many herbicides on the market basically have no effect on it. Therefore, farmers’ friends must prevent the use of medicines early and pay attention to scientific use, otherwise it will not only cure the fragrant aconite. It will also adversely cause phytotoxicity.
Three, matters needing attention
1. It is strictly forbidden to increase or decrease the dosage of drugs at will. In the hot season, you should choose to use the medicine before 10 am or after 5 pm. Do not use it for 3 days before and after lawn trimming.
2. The soil moisture and the growth of the young weeds are beneficial to the development of the medicinal effect, and the use effect is poor when the soil is dry.
3. It is required to use strictly in accordance with the pesticide operation regulations.
4. Use the second dilution method when using, that is, first dilute the agent into the mother liquor with a small amount of water, and then add water to dilute to the use concentration.
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