One of the common diseases of rice smut disease generally occurs in rainy weather, and this disease will seriously affect the yield and quality of rice. Therefore, farmers should not care about it, and must prevent it as soon as possible. So when did the rice smut mainly occur? How to prevent it? Let's take a look at it with Xiaobian.
In most parts of China, a crop is widely planted, that is rice. Rice is one of the common food crops in life and plays an important role in China's food production. Rice smut is a common disease in rice planting. It is a common fungal disease in rice planting, which seriously harms the yield and quality of rice planting.
Rice false smut occurs mainly during the heading and flowering period, and climatic conditions, field humidity, and nitrogen fertilizer application have a great impact on the severity of the disease. In the late flowering stage of late rice, if it is in continuous rainy weather, it will be beneficial to the infestation and reproduction of the pathogen, and the disease will be heavy.
Although rice smut is easy to occur during the heading and flowering period, it is studied that it can invade the ear mites at the earliest stage of booting. At the same time, in combination with various factors that cause damage to rice smut, production can be controlled from the following aspects:
1. Selection of resistant varieties: Different varieties of rice have different resistance to rice smut. According to the situation of each place, strong varieties with strong resistance are selected.
2. Seed disinfection: Rice false smut can be transmitted through seeds, and rice seeds that have been infected should be avoided as much as possible. When soaking seeds, use 500 times of strong chlorine semen to soak seeds for 10-12 hours, or use 100% of powdered rusting wettable powder 300-400 g for seed dressing per 100 kg of seeds before sowing.
3. Strengthen field water and fertilizer management to promote growth and robustness. During the growth of rice, rational fertilization should be applied to increase the application of phosphorus and potassium fertilizers to promote stable growth and enhance resistance. In particular, nitrogen fertilizer should be applied cautiously to avoid excessive application of nitrogen fertilizer, too late, so as to avoid greedy late maturity and cause disease. Promote the technology of thin dew irrigation, pay attention to the field water pipes in the late booting stage, do not flood the water, and flood the water for a long time. It should be shallow water irrigation to avoid excessive humidity in the field, which is conducive to the germination and invasion of the spores.
4. Chemical control: master the medication at the end of the booting stage.
1 2-3 days before the break, use the enemy to stabilize 10g or good Lectra EC10ml with water 60 kg spray. Spray again when the mouth is 1/3-1/2.
2 5-7 days before the break, use 20% triadimefon emulsifiable concentrate 100 ml or 25% triadimefon (triazolone) wettable powder 100 g + 40% carbendazim suspension 100 ml or 50% carbendazim wettability Powder 100 g spray with water 60 kg. Spray again when the mouth is 1/3-1/2.
The occurrence of rice false smut is closely related to climate, fertilization level and variety resistance. In the cultivation of rice, flooding, string irrigation and flood irrigation are also an important factor leading to the prevalence of rice false smut. In the process of fertilization, the excessive application of nitrogen fertilizer or too late and the cultivation of late-maturing varieties or transplanting too late are all favorable factors for the occurrence of rice false smut. Rice growers should rationally fertilize during rice growth, rationally irrigate paddy fields, and avoid rice smut.
Rice is the main food crop in most parts of China. It is understood that many areas rely on planting rice to survive. It is conceivable how much rice yield and quality are planted for growers, so the above-mentioned rice smut disease occurs. How to prevent and control, you should not miss it.
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