What kind of herbicide is used in Rice Trifolium

In the paddy field, you can generally see a weed called Trigonium, which has a strong reproductive ability and has a great impact on the growth of rice. at the same time, it can also provide a breeding place for diseases and insect pests. When planting rice, it must be removed. What kind of herbicide should I use for rice clover?

1. What kind of herbicides are used in Rice Trifolium

Before sowing rice, glyphosate can be sprayed, propachlor and bensulfuron-methyl can also be used as pre-seedling herbicides, and post-seedling weeding can be treated with picosulfuron, dimethyltetrachloride, promethazone and other herbicides.

II. Key points for the use of herbicides in paddy fields

1. To understand the growth habits and occurrence rules of all kinds of weeds. The first germination peak of weeds appeared 7-10 days after planting, and these weeds were mainly Gramineae weeds such as Echinochloa chinensis, barnyardgrass and annual Cyperaceae weeds such as abnormal sedge. The second germination peak appeared 20 days after planting, and these weeds were mainly Cyperaceae weeds and broad-leaved weeds.

2. Choose suitable herbicides according to rice fields and weed types. Herbicides containing Acetochlor and metsulfuron can not be selected in seedling field, direct seeding field and seedling throwing field, such as Acetochlor, methanesulfuron, dicotrexil, herbicide king and so on. These herbicides are only suitable for artificial planting rice field and machine transplanting field. If there is no clear distinction between the types of rice fields and the misuse of herbicides, they often fail to achieve the desired results. Some herbicides only have control effect on monocotyledonous weeds such as barnyard grass, while some herbicides can only kill dicotyledonous weeds such as Hedyotis diffusa. When chemical weeding is carried out in paddy fields, it is necessary to understand the herbicide spectrum and the species distribution of weeds in the field.

3. The opportunity for weeding should be grasped. Only when weeds are most sensitive to herbicides can the herbicidal effect be improved. The safety of rice seedlings can only be ensured by applying herbicide in the growing period with the strongest resistance to herbicides. Generally speaking, weeds are most sensitive to herbicides at seed germination stage and seedling stage, and herbicides are the most effective, while rice is the most sensitive to herbicides before budding and 4-leaf stages. attention should be paid to the concentration of herbicides when applying herbicides at these growth stages. The application time of any herbicide must be combined with the transplanting time of rice.

4. The fields using chemical herbicides should first be leveled, keeping the water layer 3-4 cm deep, requiring that the chemical should be applied in a certain period of time, and the water layer should be kept at a certain depth 3-4 days after application. Generally speaking, in paddy fields with high content of organic matter, the soil has strong herbicide adsorption, and the amount of herbicides can be increased as appropriate; when the temperature is high, the efficacy of herbicides is easy to play, and the dosage should be appropriately reduced, otherwise, it should be increased appropriately; when the dew is not dry, it is not suitable to apply pesticides, especially it is not suitable to sprinkle pesticide soil, so as to avoid drug damage caused by herbicides on grass leaves. The intensity of light also has a great influence on herbicides. Substituted urea and triazobenzene herbicides are typical photosynthetic inhibitors. Strong light for a few days after application can improve the herbicidal effect, while pentachlorophenol sodium is easy to decompose in light and should be used in cloudy days.

The application of herbicides should be reasonable, and the suitable agents should be selected according to the actual local conditions.