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Seedling pests feed on the roots, stems, and leaves of crops, causing large areas of crop seedlings to die, causing great harm to agricultural production. Because some of the pests are underground pests, they live in the soil, which is harmful to crop roots and stems. Therefore, it is necessary to implement the “prevention-based, comprehensive prevention and control†plant protection policy for controlling seedling pests. The main technical points are as follows:
I. Water and drought rotation of paddy field and dry field rotation can rapidly reduce the density of insect pests in seedlings in a short period of time. It is one of the effective agricultural measures to control pests at seedling stage. The seedling stage pests are serious and the conditions for implementing water and drought rotation can be adopted. Control measures.
Second, the seed treatment 1, seed coating vigorously promote seed coating technology, to avoid naked seeding. The seed coating agent is used exclusively for special purposes, that is, the corn seed coating agent can only coat the corn seed, and the soybean seed coating agent can only coat the soybean seed and cannot be used interchangeably. ,
2, pesticide dressing 50% phoxim according to the drug, water, species ratio 1:40:100 spray mixed corn, and then piled up for 3 hours, dried and sowing, control a variety of seedling pests.
Third, the number of pest populations exceed seedling crop field Control Index: grubs and adult beetle, wireworms and the adult kowtow A per square meter> 1 or mole crickets per square meter> 0.1 should take the following preventive measures.
1. Poisoning and bait trapping This method should be adopted for the occurrence of adult nymphs and nymphs and ground tigers. 90% of the crystal trichlorfon 0.5 kg of water, 2.5 to 5 kg, 50 kg mixed chopped spinach leaves, a distance of 30 ~ 40cm diameter pile in every evening, a small pile 15cm high, mu bait 15 kg.
2, spread the poisonous soil 100 grams of phoxim with acre, mix fine soil or fine sand 30 kg, mix evenly, the strip is applied to the crop rhizosphere, after applying soil, can control a variety of seedling pests.
3, pharmacy spray for feeding on the leaves of the chafer, like a seedling stage pests. In the morning or evening feeding activity, and ground spraying 20% ​​of the net 400 times weevil control.
Occurrence of pests in seedling stage and prevention and control measures
Seedling pests are a large class of pests that are harmful to crop seedlings. The main species are alfalfa (adults are chafers), golden needles (adults are taro), alfalfa, and ground tigers (including earth tigers, small tigers, white tigers). , yellow earth tigers, etc.), Mongolian soil elephants, large gray elephants, net sand dive, root soil and so on.
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