It is vulnerable to underground pests, forming insect tracts, causing sweet potatoes to rot, lowering quality, and being inedible in severe cases, resulting in reduced production and loss. The following pollution-free methods are used to control sweet potato underground pests 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, immerse 25 to 30 times of superphosphate and dry and pure ash mixed clarification solution every 10 to 15 days, or 10 to 15 times of tea bran soaking clarified liquid, or 15 to 20 times of tobacco leaf leaching 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, the underground pests that damage the sweet potato can be killed and the sweet potato can be protected. 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-resistant ability 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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