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Sweet potato is vulnerable to underground pests, forming insect tracts, causing sweet potato to rot, lowering quality, and being unable to eat when severe, resulting in reduced yield and loss. The following pollution-free methods are used to control the underground pests of sweet potato without any toxic residues, which will not pollute sweet potatoes and will not endanger the health of the human body.
During the rapid expansion of sweet potato, every 10 to 15 days, the roots should be sprayed with 25 to 30 times of superphosphate and dried and pure ash mixed with clarified liquid, or 10 to 15 times of tea bran soaked with clear liquid, or 15 to 20 times with tobacco leaves. Clear liquid, etc., continuous leaching 2 to 3 times, each time 5 to 6 kg per square meter of soil is appropriate. When the soil is slightly moist after the rain, or in the morning and evening, it can kill the underground pests that harm the sweet potato and protect the sweet potato. If 80-100 times of aqueous solution of magnesium sulfate can be added, the effect is better, which can improve the control effect, enhance the insect resistance of sweet potato, promote the rapid expansion of sweet potato, increase starch accumulation, significantly increase yield, and improve quality. Extend storability.
During the rapid expansion of sweet potato, every 10 to 15 days, the roots should be sprayed with 25 to 30 times of superphosphate and dried and pure ash mixed with clarified liquid, or 10 to 15 times of tea bran soaked with clear liquid, or 15 to 20 times with tobacco leaves. Clear liquid, etc., continuous leaching 2 to 3 times, each time 5 to 6 kg per square meter of soil is appropriate. When the soil is slightly moist after the rain, or in the morning and evening, it can kill the underground pests that harm the sweet potato and protect the sweet potato. If 80-100 times of aqueous solution of magnesium sulfate can be added, the effect is better, which can improve the control effect, enhance the insect resistance of sweet potato, promote the rapid expansion of sweet potato, increase starch accumulation, significantly increase yield, and improve quality. Extend storability.
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