The detoxified sweet potato refers to the sweet potato that has been treated with the detoxification technology and subjected to rigorous virus technology tests to confirm that it does not contain any virus or viruses, and its progeny that have been propagated in aphid-free soils. The detoxified potatoes do not change the characteristics of the varieties. Compared with the same varieties of ordinary potatoes, the detoxified potatoes have the characteristics of good sprouting, strong growth, early tuber, rapid enlargement, and high yield. The requirements for cultivation conditions are slightly different.
First, deepen the plough layer: The depth of the plough layer should be 25-30.
Second, fertilization: virus-free sweet potato growing vigorously, should be less nitrogen fertilizer, the corresponding increase in phosphorus and potassium fertilizer and organic fertilizer.
Third, the rational close planting: virus-free sweet potato planting density and the same variety of ordinary potato should be basically the same or slightly less.
IV. Chemical control: The virus-free sweet potato grows vigorously and is prone to leggy. It can be sprayed once every 666.7m2 with 15% paclobutrazol 80g watered with 70kg each time in the group stage and seal period.
V. Pest Control: Detoxification is just a sweet potato without virus. The disease resistance is basically the same as that of common sweet potato, and its pest control should be the same as that of common sweet potato.
Six, timely replacement of varieties: virus-free sweet potato planted in the field for 2 to 3 years, that is infected with the virus and no different from ordinary sweet potatoes, should be promptly replaced with new virus-free varieties.
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