This kind of grass in the early stage, is growing with the rice, arching seedling grass did not get rid of it, and it grows in the gap between the rice and rice, it is difficult to get rid of it, it and rice together with the competition for nutrients, competition for space, so it is necessary to pull it out, in the beginning, we know the young people simply can not distinguish what is the rice and what is the barnyard millet, the scholars of old farmers, in the rice fields Carefully find, at that time, the rice grows knee high, to distinguish them is not really an easy thing, because they look basically the same, may be those tares in order to confuse people's eyes, dress themselves up and rice the same. Because it is not easy to distinguish, many people do not know how many should not be pulled out of the rice, the old farmer has a way, it is very graphic to tell us, rice and tares in the small time is not easy to distinguish, to be it grows a little bit bigger when it is good to distinguish, the seedling in the leaves of the place of the hair, and the tares are not. There is also its appearance is different, tares leaves pointed longer. When they grow up, they will grow apart, unlike the rice in one piece. It's good to tell them apart over time, and we look at the appearance and then at the leaf separation in order to accurately tell them apart.

General distinguishing method: Because rice is transplanted or thrown after tillering, barnyard grass is natural growth, so there are more forks near the root; and barnyard grass near the root is much smoother than rice. These two characteristics are more obvious, much easier to distinguish than the above method. In fact, there is no need to judge whether the root near the smooth, because the reason for rice tillering is to reduce the rice plant density to improve rice yield, because the rice plant density is too large plant basically because of nutritional problems are not good, so the rice plant plant density is too large can be pulled out together with the weeds. Of course, frugal old farmers will distinguish the rice plants and pull out half of them. Tares are widely distributed throughout the country. It is often found as a dominant grass in moist farmland, wasteland, roadsides, ditch edges, and shallow water drains, ponds and swamps. On rice, corn, beans, potatoes, cotton, cereals and vegetables and other crops are harmful, 2012 has risen as the first rice producing areas of the first malignant weeds, affecting rice yield and quality.

I, live field barnyard grass control

1. live field bud closed herbicide available benzyl-propylchlorazone (plus safety agent), pyrazine-propylchlorazone (plus safety agent), propylparaben (plus safety agent), etc., can be used to prevent and control barnyard grass, Chikungunzi and other grasses, Salicaceae and broadleaf weeds, the specific use: germination and sowing of 2-4 days after the water 30-45 kilograms of uniform spray, before and after application of the medicine. Keep the field board moist for 3-5 days after application, and then resume normal field management.

2. Direct seeded field post-seedling stem and leaf herbicides can be used: dichloroquinaldic acid, dichloroquinaldic acid and dichloroquinaldic acid intermixed preparations, etc., in the rice 2.5 leaves after the period, mu with the active ingredient of 10-20 grams, water 30-45 kilograms of uniform spray. When barnyard grass occurs seriously, it can be sprayed evenly with 30-50 ml of water per mu of pentafluorosulfuronylmethane (Injen).

Two, transplanting field, rice field barnyard grass control

Rice transplanting or transplanting, to be seedling rooting, barnyard grass 1-3 leaf period with dichloroquinolinic acid, dichloroquinolinic acid and dichloroquinolinic acid intermixed preparations, etc., mu with the active ingredient of 10-20 grams of water 30-45 kilograms of uniform spray. When barnyard grass occurs seriously, can be used pentafluorosulfoxim (rice Jie) 30-50 ml per mu or double grass ether mu with 3-4 grams of active ingredient, to water evenly spray.

The barnyard grass should be the sedge family of tussock plants, your picture above for the gramineae barnyard grass, not barnyard grass, not to mention the mountain barnyard grass, there is misleading.