What to Do When Rice Gets Rice False Smut? Symptoms and Control Methods
Rice is an important food crop in China, and its planting area is extremely wide. With advances in technology, rice yields have been greatly secured, but diseases during cultivation are an important factor hindering high rice yields. Among them, rice false smut is a common one, so how should rice false smut be controlled? Let's find out together.
1. Disease Symptoms
Rice false smut is a fungal disease that is relatively common during rice cultivation. It mainly damages the panicle of rice. When infection generally occurs, a kind of mycelial mass forms inside the rice grains of the panicle. This mycelium gradually enlarges, causing the rice grains to crack. On careful observation, pale yellow goose-block-like substances, similar to spores, can also be found. After a period of time, these spores crack open and turn into dark green powder, which spreads through wind and rain, causing the affected rice panicles or grains to be unable to continue normal growth.
2. Disease Development Pattern
It can itself carry the pathogen and spread it. This situation generally means the paddy field itself is infected with rice false smut. When the rice matures and is harvested, the probability that the seeds carry this pathogen is very high. Sometimes it is difficult to detect, but after sowing seeds carrying the pathogen, the grown rice will also gradually show it at the panicle stage, and then it occurs on a large scale. The second situation is that the soil carries the rice false smut pathogen. These pathogens have strong adaptability, and even in the cold weather of winter, they can safely overwinter. When the temperature rises the next year, they will also slowly reproduce after the rice is sown, and at the panicle stage they spread through wind and rain and cause damage.
3. Control Methods
First, choose varieties with strong disease resistance. When fertilizing, do it reasonably and do not apply too much nitrogen fertilizer. It is recommended to use nitrogen, phosphorus, and potassium fertilizers reasonably. In the middle and later stages, appropriately supplement some trace elements to ensure normal growth. Strengthen field management. For example, seed dressing with chemicals before sowing can have a certain preventive effect. Second, do a good job of field drying, and promptly remove diseased residues after harvest. When the disease occurs, specialized fungicides can be used for control, such as jinggangmycin, difenoconazole, propiconazole, and others.
The above is an introduction to the symptoms and control methods of rice false smut. We hope it can help you. To learn more related knowledge, please follow us.