The seed potato variety chooses high-yield, drought-resistant and virus-free seed potatoes within three generations, and according to market requirements, it selects special, high-quality, high-resistance varieties that meet the ecological conditions and market needs of the region. The planting varieties in the high-water-fertilizer area in the southwestern part are Kexin No.1, Zhangzhangshu No.8, Atlantic Ocean, Xiapudi, Feiwuruita, Qishu No.10, Qishu No.7, Qishu No.6, and green potato series. The main part of the southeast is the glutinous potato No. 10, the glutinous rice No. 7, the glutinous potato No. 6, the Zhuangshu No. 3, the glutinous rice berry No. 8, and the green potato series; the north is Xindaping, Zhuangshu No. 3, and the potato No. 10, No. 7 and so on.
The seed potato treatment should be based on the selection of good varieties. The seed potato should be healthy, disease-free, no damage, smooth skin, bright color, uniform weight of 50~100g, and good storage of potato pieces with the characteristics of this variety.
Germination: 10~15 days before sowing, placed in the room of 18~20°C, flipped once every 3~5 days, and grows about 1cm thick purple buds in about 10 days.
Cut potatoes: When cutting, it should be carried out 2~3 days before sowing. The size of the cuts should be 30~50g, and each cut should have at least 1~2 buds. Prepare 2~3 cutting knives, put them in a concentration of 0.1% potassium permanganate solution or 75% alcohol, and sterilize them. When the potato is 30 pieces, replace the tool once. In the process of cutting, if the disease occurs, the seed potato should be removed immediately, and the tool should be replaced at the same time to cut off the path of infection. Promote small whole potato sowing.
Seed dressing with rare earth dry land treasure 100ml water 5kg soaking seeds, soak for 20 minutes, remove and put in a cool place to dry to be broadcast. Or use 12.5 kg of 70% methyl thiophanate + 2.5 kg Cobo to mix 100 kg of talcum powder into a powder, mix 10,000 kg of potato chips. Or use 24.0 kg of 70% methyl thiophanate + 1.0 kg of 72% agricultural streptomycin to mix 100 kg of talcum powder into a powder, mix 10,000 kg of potato chips. Or soaking and disinfecting the seed potato with metalaxyl 25% wettable powder 400 times can effectively prevent the occurrence of potato disease. Or 1 kg of seed potato soaked in 50 mL of 2% copper sulphate solution for 10 minutes to prevent the occurrence of potato ring rot. Or planting immediately after planting with plant ash can prevent the occurrence of potato black stem disease.
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