What factors are involved in underground pests?
Underground pests seriously affect the growth of crops. To eliminate underground pests, we need to check the source. First, let us first understand the occurrence of underground pests and those factors, and then learn the specific methods to eliminate underground pests:
Underground pests include scarabs, mites, and ground tigers. Due to their wide distribution, miscellaneous food, strong concealment, serious harm and mixed occurrence, if they are negligent, they will cause serious losses.
The occurrence of underground pests is closely related to the soil texture, water content, pH, predecessor of the depression and the surrounding flowers and trees. For example, tigers prefer moister loamy loam. The chafer larvae (scorpion) are suitable for neutral or slightly acidic soils. If they are used as legumes and add unfertilized manure, there will be more cockroaches. It is produced in wasteland and river near light saline soil, sticky sand, moist, soft and humus.
Underground pest pests are concentrated in spring and autumn. The main use of chewing mouthparts harms seeds, seedlings, roots, rhizosphere, seedling leaves, etc., and it is very harmful to planting plants such as trees, flowers, lawns, etc. which are sown, cut, and ramets. Some also endanger the evergreen trees, flowering shrubs and so on.
First, natural machinery control (1) tillage and land preparation. Intensive cultivation, destroying its living environment, turning over the soil surface, increasing the chance of pests being killed by natural enemies and other natural conditions. (2) Rational use of fertilizer. Increasing the application of decomposed organic fertilizer can improve soil water permeability and permeability, and is beneficial to soil microbial activities. Therefore, the root system develops rapidly, the seedlings are strong and strong, and the insect-resistant resistance is enhanced, and the unfertilized organic fertilizer is avoided. (3) Watering at appropriate time to remove weeds.
Second, physical control (1) light trapping. Using the phototaxis of adults such as chafers, crickets, and tigers, the nursery can be trapped by black light. (2) Drug trapping. Use 5 kg of fried wheat bran and add 50 grams of trichlorfon, add appropriate amount of water, and mix it with poison bait to kill between flowers and seedlings. The ratio of sugar, vinegar, liquor and water is 6:3:1:10. Put a small amount of stomach-toxic pesticides in a tray of 200 square meters of seedlings, take it back the next day, or use a sweet and sour liquor to attract moths. The chafer is smashed with 0.5 kg of nettle leaves, added with 5 kg of water, soaked for 2 hours to filter, spray the chafer in the affected area, or dry the arborvitae leaves into fine powder, and simultaneously apply the seeds to the soil, killing Dead chafer larvae.
Third, chemical control (1) soil treatment before planting. Before the preparation of the ground, 40% methyl isoflavin or worms were evenly applied to the ground, and then the sputum was evenly distributed in the tillage layer, which could both kill the underground pests and treat other pests lurking in the soil. (2) Prevention and control of underground pests during the prosperous period. Can be sprayed with 90% trichlorfon 500 times solution, 50% monocrotophos 600 times solution, or 50% phoxim 1000 times solution in roots of seedlings, 50% malathion 800 times solution, 25% acetophenone solution Phosphorus 800 times solution. The drug solution is infiltrated into the deep layers of the soil where the pests are often active, poisoning and killing cockroaches and tigers. Turfgrass can spray 1000 times of 50% phoxim solution on the lawn during the adult period, or apply a mixture of 2.5% trichlorfon powder 1:1 to the soil, 0.75-1 kg per mu plus 30 Mix the fine soil to kill the worms and prevent spawning.
More underground pest control, please pay attention to pesticide network
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