What are the excellent virus-free sweet potato varieties in Henan?
Virus-free sweet potatoes refer to sweet potatoes obtained through virus-free technology and confirmed by strict virus testing to be free of certain viruses, as well as their offspring bred in aphid-free and pathogen-free soil.
At present, viral diseases have become an important cause of the degradation of sweet potato seed performance, yield decline and quality deterioration in Henan Province, while virus-free sweet potatoes can generally increase yield by more than 30%, and their quality and appearance are also improved. Therefore, selecting virus-free sweet potato seedlings is the prerequisite for achieving high sweet potato yields.
Sweet potatoes for starch processing
Xushu 18: Virus-free Xushu 18 yields about 40% more than non-virus-free Xushu 18, with a dry matter rate of 30% and a starch rate of 20%. In addition, virus-free Xushu 18 plants grow vigorously, are highly tolerant to poor soil, have wide adaptability, and are highly resistant to root rot (black root rot). The yield per mu can reach more than 2500 kg.
Yushu No. 13: Highly resistant to root rot and resistant to stem nematode disease, with shorter stems and vines. Its starch content is close to that of Xushu 18, and its yield is more than 10% higher than that of Xushu 18. The yield per mu of spring sweet potatoes can reach more than 3000 kg, and the yield per mu of summer sweet potatoes can reach more than 2000 kg.
Rushu Huang: This variety was selected and bred from 134 sweet potato varieties. After virus elimination, it has strong drought resistance, is highly resistant to stem nematode disease and root rot, has a dry matter rate of 32.9%, and a fresh sweet potato yield per mu of about 3000 kg. It has a high rate of large tubers, and both the skin and flesh of the tubers are yellow.
Sweet potatoes for eating and for the commercial market
Sushu No. 8: This variety has short vines, strong drought resistance, resistance to stem nematode disease and black spot disease, but is not resistant to root rot. The yield per mu of spring sweet potatoes can reach 4000 kg, and the yield per mu of summer sweet potatoes can reach more than 3000 kg. It tastes excellent when cooked.
Yushu No. 12: This variety is tolerant to waterlogging. The yield per mu of summer sweet potatoes is generally more than 2500 kg, about 20% higher than that of Xushu 18, and its starch rate is equivalent to that of Xushu 18. It is resistant to root rot, has a dry and sweet taste, and is excellent for both processing and eating.