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.
Related
- The first cup of black tea in spring, the flavor and history of tea gardens in Kenya, Africa
- The computer can not only choose potatoes, but also grow tea rice. AI will grow winter oolong tea champion.
- It is not only the inflated tea bitten by insects, but also engraved with the four seasons tea in Beipu.
- The Oriental Beauty Tea Festival in Zhuxian County takes the stage at the weekend to experience the plus-size feast of oil tea.
- & quot; Oriental Beauty Tea & Exploration of Emei in Hsinchu, the hometown of quot;
- The new variety of strawberry "Tainong 1" dessert is the first choice with mellow aroma. Crimson gorgeous
- History of Tea in Taiwan: from Wild Inner Mountain to Export Tea Garden
- Two types of Taiwan Oriental Beauty Black Tea won the British three-Star Award for Childhood Tea Xiang Zhang Jiaqi changed from pilot to champion tea maker.
- Banana species and varieties: the planting history of Taiwan Xianren banana and dwarf banana is long, is banana disease resistant?
- Coffee planting Technology: Qianjie Coffee from Seedling to harvesting