The latest causes and control methods of yellow leaves of rice

In the process of rice growth, leaf yellowing is a common phenomenon, and many farmers will encounter this situation, and there are many reasons for rice yellow leaves. The following editor summarizes the causes and control methods of rice yellow leaves. Let's learn about it.

1. Toxic yellow leaves

In fact, it is easy to judge the yellowing of rice leaves caused by poisoning. From the root point of view, the symptom of root blackening is extremely obvious, and it will be accompanied by the smell of rotten eggs.

Prevention and control methods: for toxic leaf yellowing, it is necessary to drain the field in time, at present, in order to get more oxygen in the soil, detoxification is carried out through oxygen, and then after applying compound fertilizer or spraying foliar fertilizer, rice can turn green.

2. Yellowing due to nitrogen deficiency

When rice leaves turn yellow, many people's first reaction is caused by element deficiency. Indeed, when rice is deficient in nitrogen, it will cause rice yellow leaves, and it is relatively easy to judge. Generally, it begins with the old leaves yellowing, gradually spreading like heart leaves, and gradually spreading to the whole plant. From a distance, it looks like rice is ripe.

Control methods: nitrogen deficiency caused by leaf yellowing can be topdressing urea, it is recommended to start topdressing in the early stage of yellowing, do not wait until the whole plant yellowing after topdressing, it will be too late.

3. Herbicide damage

The damage caused by herbicides can also cause yellow leaves of rice, light leaves appear yellow spots, and then rice wilt, wilt, serious will lead to the death of the whole plant, this is a typical herbicide damage.

Prevention and control methods: if the herbicide damage is found earlier, you can spray water as soon as possible to reduce the concentration of herbicides, while if it is found later, when the rice has withered, it will be hopeless.

4. Bacterial diseases

There are many bacterial diseases that can cause rice leaves to yellowing, such as bacterial leaf blight, bacterial stripe, bacterial basic rot and so on. After infection, the heart leaves of rice will wither and curl. If it is bacterial streak, if the diseased plant is broken, there will be yellow "bacterial pus". If it is bacterial basic rot, if the diseased plant is broken, there will be a rotten smell.

Prevention and control methods: it is not difficult to control bacterial diseases, it can be sprayed with leaf fumazol, agricultural streptomycin sulfate, thiosen copper and other agents, generally every other week.

The above is the introduction of rice yellow leaf causes and control methods, hope to help you, want to know more related knowledge, please pay attention to us.