Speaking of the common broad-leaf weeds in rice fields, they are generally arrowheads, duckweeds, knotweeds, spinachweeds, sedges, etc. I wonder if you have such a feeling. When it comes to controlling rice weeds, they are basically Gramineae, and broadleaf weeds are not mentioned. However, in recent years, many changes have taken place in broadleaf weeds in rice fields. There has been an increase in the number and types of grasses, and it also poses challenges in terms of control difficulty.

At present, in the actual planting process, the pesticides used to control broadleaf weeds in rice fields include the following: bensulfuron-methyl, pyrazosulfuron-methyl, dimethyl tetrachloride, and fluroxypyr. , bentazone, etc. However, according to the feedback of some farmers, the weeding effect of the above single doses is not that obvious after application. Even if the grass turns yellow in the early stage, after a while, the weeds turn green and there are still many weeds in the ground.

In view of this situation, the little helper recommends that we perform post-emergence weeding at the same time. First, seal the farmland once, and then wait until the weeds have 2-3 leaves before spraying post-emergence weeding. Agents, the specific agents are mainly bensulfuron-methyl, pyrazosulfuron-methyl, dimethyltetrachloride, fluroxypyr, bentazone, etc. If the local weeds are relatively resistant, a single agent will not be effective. In this case, compounding is carried out, such as pyrazosulfuron-methyl, fluopyron, bensulfuron-methyltetrachloride, dimethyltetrachloride, etc., or a three-way compounding.

In the actual weeding process, we will not only kill broad-leaf herbicides alone. They are basically used in combination with sharp-leaf herbicides (not just rice, but other crops as well). Please note that you should start applying pesticides when the weeds have 2-3 leaves. At this time, the rice is probably at 2 or 3 leaves. Don’t do it too early or too late. At the same time, go slowly and sparsely where weeds are densely packed. Where, walk faster and penetrate,