Seeds are pre-sowed well, and seed-borne diseases are prevented early:
First, potato late blight
2 days before sowing, choose healthy seed potatoes, remove diseased potatoes, rotten potatoes, cut potato chips and use 58% metalaxyl manganese WP 500 times solution or 80% mancozeb WP 600 times to evenly spray wet potato chips. Soaked after drying. When cutting, the cutter should be strictly disinfected to prevent the infection of the bacteria by the knife. Generally, the knife is disinfected with 75% alcohol solution, and the bacteria such as ring rot and bacterial wilt can be prevented from being infected by knife.
Second, rice seedling disease
According to the large-scale application results in recent years, it is best to control rice seedling disease by soaking 25% of prochloraz. Water soaking with 25% prochloraz 3000 times liquid can be effectively prevented, and dry seedlings with 25% prochloraz 2000 times liquid soaking effect is better. The soaking time is 48 hours. After soaking the seeds, remove them and wash them with water for germination.
Third, corn silk smut
Maize seed treatment can not only kill the bacteria attached to the seeds, but also prevent the invasion of bacteria from the corn germ in the soil. The most commonly used seed treatment method is chemical dressing. Control of corn smut can be seeded with 0.5% triadimefon WP at 0.5% of the seed weight. Seed dressing method 1: Use rice soup or cornmeal to make a batter. After cooling, pour it on the seeds, then pour in the powdery rust and mix well. Method 2: Drop a few drops of vegetable oil on 1 kg of seeds to make the seeds moist. The vegetable oil can't be dripped too much, then pour into the powdery rust and mix well, and dry the seeds. 2% tebuconazole wet seed dressing can also be used for seed dressing at 0.5% of seed weight. When seed dressing, weigh the required dose according to the recommended dosage, and then use 0.1 kg to 0.2 liter of water for 10 kg of seed (about 150 The ratio of ~200 g) is weighed out; the so-called syrup is synthesized into a paste (usually 0.2 liters of the paste-like agent used for 10 kg of seeds), and the desired seeds are poured. Into the mixture and stir well, make sure that each seed is evenly stained with the medicine, and the mixed seeds can be sown after being dried in a cool place. If the seed coated with the coating agent has been used, it can be directly sown.
Fourth, konjac soft rot
Before planting, choose a healthy seed without bacteria and no wounds. Spray the seedlings with 72% agricultural streptomycin 2200 times, dry and sown. If it is placed on the flat (mud) for 1-2 days (not to be sun-dried on the concrete floor) and then sown, it can act as a fungicide , germination, and promote the bud sprouting.
Five, matters needing attention
The effect of seed treatment is closely related to the type of seed treatment agent and the corresponding supporting technology. If it is not well mastered, it will not only affect the control effect, but also adversely affect seed germination and seedling growth. Therefore, all localities should make full use of various propaganda and training channels, and hand over the various points and precautions of seed treatment technology to farmers, and truly exert the disease control and disease prevention effects of seed treatment.
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