Many farmers' friends know that underground pests are extremely harmful to crop roots. If they can't do well, they will greatly reduce production. One of the pests is very harmful to sweet potatoes. If the control is not good, it will affect the yield very much. This kind of pest is collectively referred to as underground pests, specific packaging, cockroaches and so on.
1. Causes of underground pests
The source of underground pests is mainly divided into two types, one is the eggs in the soil, and each year when the temperature rises, it automatically hatches and bites the roots. There is also a kind of underground pest that may be brought in the farmyard manure and brought into the soil when it is applied.
2. Physical control method
For the treatment of these underground pests, physical control methods can be used. This method is generally started in the early spring, mainly for the eggs in the soil. When the winter is just entering the winter, the soil should be deeply cultivated. The eggs can be turned out and frozen at low temperatures. For pests brought by farmyard manure, high-temperature insecticidal eggs can be used, and the decomposing treatment of farmyard manure must be in place before fertilization.
3. Chemical control method
The main method of chemical control is to disinfect the soil and root the crops. When ploughing the land every year, some phoxim particles can be sprinkled in the soil, and the soil is mixed for disinfection purposes. If the root is poured, it is mixed with the pesticide and the plant ash in the water, and then the sweet potato is rooted with this solution.
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