Vegetable underground pests mainly harm the underground parts of vegetables, often causing rooting, dead seedlings, and even lack of seedlings. Because underground pests are potentially harmful, we must grasp their laws to prevent and control them. Most of the underground pests have a relatively stable ecological environment, long life cycle, weak migration, and also have the characteristics of vertical activity with changes in the ground temperature, forming a peak of harm in the spring and autumn. If the environmental factors change or the human disturbance occurs, the population density will naturally decrease. Therefore, in the comprehensive prevention and control strategy, it should be based on agricultural control measures to make its ecological environment worse, supplemented by chemical prevention and other measures. Agricultural control measures such as crop rotation, golden needleworm, etc. prefer to eat grass crops, in the two serious pests of the land, the implementation of crops and dicot crop rotation.蛴螬 Many eating dicotyledonous crops, some species are particularly fond of leguminous crops, and 2--3 year rotations with grass crops can significantly reduce the population density. Deep plowing and ploughing are used for intensive cultivation, and fully applied manure and cake fertilizers are used to reduce the damage of various underground pests. Science watering timely watering can control the pests of fly maggots, wireworms and other pests, especially in the heavy land where the species flies, after the spring watering sowing should be immediately covered with soil, do not expose the manure and wet soil to avoid attracting adult worms spawning. When the garlic "bad mother", should be pouring water. Chemical treatment soil treatment before vegetable sowing, 1/15 hectare (1 acre) can be used 50% of phoxim EC 100--200 grams, or 80% of dichlorvos EC 100 grams, formulated into slag granules 15--20 kg Sprinkle on the surface and immediately work hard. The pesticide seed dressing can be used in the severely damaged land where 40% diazinon EC can be used, and seed dressing can be used at a seed amount of 0.4%--0.5%. The effect is good. Poison baits can be trapped and killed on bait-based plots. The specific method is to fry the peanut cake or wheat bran with 80% trichlorfon wettable powder or 50% phoxim, 1 kg trichlorfon or phoxim per 100 kg peanut cake or wheat bran Add 10 kg of water to mix well and mix baits. During the vegetable seedling stage, spread it on the ground in the evening ridges and use 15-25 kg for every 1/15 ha. The tiger larvae also have a good trapping effect. In areas where the ground tiger is severe, 10 times of the above-mentioned certain pesticides can be sprayed and mixed in the fresh grass or fresh leaves of the crushed pests to make poisonous grasses (poisonous vegetables). In order to prevent the fresh grass from drying up quickly, it is divided into small piles and applied to the fields. Each 1/15 hectare uses 15-20 kg. The dead insects are picked up early in the morning to prevent their resurrection. Spraying/dusting seed flies can spray 80% dichlorvos 800--1000 times, or 2.5% deltamethrin EC 3000 times on onions, garlic vegetables, and field manure heaps during the adult emergence season. To kill adults, reduce spawning and larval populations. Watering in the heavier plots of garlic, leeches, and flies, the application of larvae during the critical period of larval emergence. 90% trichlorfon crystal 300--500 times or 50% dimethoate 1000 times. When the leek is transplanted, use 50% phoxim EC 1000 times dip.
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