There are many weeds in the rice field. Is there any way to get rid of them?

At present, Zizania latifolia and Zizania latifolia are malignant weeds in direct-seeded rice fields, which occur early, take a long time and have a large number, accounting for 30%-70% of the total grass yield. The following small series introduces the use methods of several commonly used herbicides, such as thidiazuron and pyrazosulfuron-methyl. Penoxsulam: Now the patent protection of this drug has expired, and domestic manufacturers also produce it. Many places have used 4g pure penoxsulam per mu this year. In the areas with low resistance, penoxsulam has a good effect on barnyard grass.

Barnyardgrass can be divided into rice barnyardgrass and water barnyardgrass, and barnyardgrass has changed in recent two years. Barnyard grass has the worst resistance, followed by rice barnyard grass, and barnyard grass has the best resistance. If drugs are used, they need to be used before booting stage, which is sensitive to herbicides, especially herbicides that kill gramineous weeds. The most economical and effective measure to control barnyard grass in rice field is to close all kinds of barnyard grass before germination, and different pesticides can be used. Use 25% bensulfuron-methyl-propisochlor (live broadcast guarantee) 40 per 667 square meters. Glyphosate and glufosinate are used alone: these two drugs are widely used alone, which can inhibit common weeds well. In particular, glyphosate can directly rot weeds. If the control is effective, it lasts longer and the relative price is cheaper, so it is widely selected. First of all, herbicide is a special herbicide. When using special herbicides, it is beneficial to spray herbicides and compound fertilizers (remember that they are special herbicides) before transplanting seedlings, and the herbicide weeding compound fertilizer is the base fertilizer.

According to the different cultivation methods of rice in direct seeding field and transplanting field, different effective weeding methods are adopted. The root system of transplanted rice in transplanting field has a certain depth, so the drug resistance is stronger. At the same time, there are more kinds of weeds. Chemical herbicides have many advantages, one is good weeding effect. As long as the drugs are selected correctly and used properly, it is safe for crops, and the weeding effect is generally 80-90%, which is more thorough and timely than manual work. Second, it is conducive to increasing production. Weeds compete with crops for fertilizer in farmland.