Rice is one of the more common economic crops in China. Almost every family grows, but with the changes of environment and external factors, rice is infected with various diseases, and rice seedling disease is the most common one. What is the disease? How is it caused? What medicine can be cured?
Rice seedling disease, also known as male carp, can occur from the seedling stage to the heading stage. The pathogen is parasitic or attached to the seed, and the seed carrier is the main cause of the disease. Seriously ill seeds often fail to germinate, or seedlings can die shortly after germination. The diseased seedlings of the diseased seeds grow longer than the healthy plants, the plants are thin, the whole plant is yellow-green, the roots are poorly developed, and some of the diseased plants die before and after transplanting.
In the adult stage, the diseased plants usually appear about one month after transplanting, and the pathology is similar to that of the seedling stage. The diseased plants are less or less tillering, and the internodes are significantly elongated. The lower part of the stems have many inverted adventitious roots, and the rice stalks. There are white molds in the end, which turn into a reddish color, sometimes a small black dot.
After the heading of the diseased plant, the opening angle of the flag leaf is larger than that of the normal plant. Serious illnesses die at the booting stage, mild diseases often lead to early heading, short spikes of seeds are not true. When the weather is wet, there is a reddish or white mildew on the sheath of the dead plant. There is a light red mold layer on the inside and outside of the diseased chaff.
What medicine is good? How to prevent it?
First, the seeds must be strictly disinfected
Use 50% carbendazim 100g, add 50 kg of water to soak seeds; or 35% of Miaoling 120g, soak 50 kg of water for 40 kg; or 25% Shi Baoke, 25% make 100 grams, 25% They are all of the same type of medicament, and 10 kg of 50 kg of water is used to soak 40 kg of rice seeds, and the soaking time is not less than 48 hours.
The liquid soaking must be noted that the liquid level must be 15-20 cm above the seed level for seed absorption. At the same time, during the soaking process, the liquid level remains static, can not be stirred in the middle, and can not be reused to ensure suffocating bacteria.
Second, the establishment of disease-free seeding
If you want to stay in the field, you should choose a field that is disease-free or has a light disease.
Third, found that the diseased plant was removed in time
Whether in Putian or Daejeon, the diseased plants should be removed in time to prevent the spread of infection.
Fourth, the treatment of diseased plants straw
Properly handle sick straw, can not be thrown casually, can not be piled on the edge of the field, can not be used as a cover for seed germination, can not be used to bundle the hoe, can be concentrated in high temperature stacking, severely burned with fire.
This article URL: Rice mite disease symptoms! What should be used to cure rice seedling disease?
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