Sweet potato registration is as follows:
3000-4000g/mu, hole or furrow application.
The safety interval between application and harvest is 150 days. The following regulations should be strictly observed: (1) It should not be used in sandy soil and sandy loam areas where the depth of the water table is less than 1 meter, the annual rainfall is more than 1000 mm, and the plots of land are less than 100 meters away from the water source. (2) The minimum soil water content required for the product to be absorbed by crop roots and to exert good efficacy is 5% (w/w). Otherwise, it will affect the efficacy of the drug, for this reason, in the year-round May-June climate drought in the hilly semi-mountainous areas should be used in the deep application of the drug method, that is, the drug particles in the potato seedling into the soil under the base of the stem at a depth of about 2-3 centimeters, and watering to alleviate the effects of drought on the efficacy of the drug, conducive to the normal play of the drug effect.