1. Different areas of prevention and control focus
(1) The key to prevent and control corn borer, double-spotted scutellaria, underground pests, second and third generation armyworm, large spot disease, stem rot, corn nematode dwarf disease, gray spot disease.
(2) Huanghuaihai summer sowing corn area key prevention and control of corn borer, cotton bollworm, second-generation armyworm, corn aphid, larvae, humus, stem rot, southern rust, brown spot, curved leaf spot Disease, small spot disease.
(3) The corn area in the hilly area of ​​southwestern China is mainly controlled to control corn borer, second and third generations of armyworm, sheath blight, large spot disease, gray spot disease and ear rot.
(4) The northwest corn area focuses on the prevention and control of underground pests, corn borers, spider mites, corn borers, scutellaria, stem rot and large spot disease.
2. Main pest control technology measures
(1) Corn stalks are smashed and returned to the field to reduce the number of insect source bases; the overwintering adult worms use insecticidal lamps combined with attractants to induce killing; the adult mites release the Trichogramma to eliminate eggs. At the end of the heart leaf, spray the Bacillus thuringiensis preparation, or use chlorantraniliprole, thiamethoxam, and cyhalothrin to spray with the compound, to improve the control effect, and treat the pests such as aphids and red spiders.
(2) Seedlings such as underground pests and thrips, aphids, and planthoppers are treated with thiamethoxam and cyanamide.
(3) Disease-resistant varieties such as root rot, head smut and stem rot. The seed treatment is carried out by using a flavonoid/fine nail suspension seed coating agent or a seed coating agent such as difenoconazole or tebuconazole.
(4) Selection of resistant varieties of corn leaf spot disease, rational close planting, and scientific fertilization. At the end of corn heart leaf, spray fenflurazole, diniconazole, pyraclostrobin, Jinggangmycin A and other agents, spray again every 7 to 10 days depending on the incidence, brown spot disease recurrence area Maize 8 to 10 leaf stage medication control. Mixing with brassinolide and the like can improve the control effect.
(5) Selection of resistant varieties of corn sheath blight, reasonable close planting. In the early stage of the disease, the leaf sheath of the stem base can be stripped, combined with bio-pesticides such as Jinggangmycin A, or sclerotium net, diniconazole, mancozeb and other agents, and sprayed once every 7 to 10 days depending on the incidence.
(6) Corn aphid corn is in the male stage, and the mites are sprayed with thiamethoxam, imidacloprid, acetamiprid, pymetrozine and the like at the beginning of the aphid.
(7) Corn leafhoppers promptly remove weeds from the fields. When the spot is taken, sprays such as scorpion, thiazolone, ketone, and avermectin are used to focus on the middle and lower leaf backs and the weeds in the corn surrounding the field.
(8) The early release of the cotton bollworm, the red-eye bee to kill the eggs, or the spraying of the Bacillus thuringiensis preparation, the vitamin A salt, the chlorantraniliprole and the like.
(9) The two-pointed moths ploughed into the winter leisure fields, killing or clearing the grass before sowing, and removing the coverings on the corn planting ditch. For the control of pesticides, chlorantraniliprole, avidin, etc. may be used, and spray, bait trapping and poisoning soil may be used.
Second, the professionalization of the main control technology
1. Straw treatment, deep cultivation and smashing technology adopt straw smashing and returning to the field, deep ploughing the soil, killing cockroaches before sowing, destroying the suitable places of pests and diseases, and lowering the base of pests and diseases.
2. Adult trapping and killing technology In the emergence period of pest adult insects, using insecticidal lamp to trap and kill, the corn cockroach overwinter adult can be combined with lure traps.
3. Seed treatment technology According to the types of pests, soil-borne diseases and seedling diseases and insect pests, select suitable seed coating agents to carry out uniform coating of seeds.
4. Seedling stage pest control technology According to the occurrence of the second generation of armyworm, thrips, gray planthopper, beet armyworm and cotton bollworm in the seedling stage, spray treatment with insecticide such as carbaryl salt, chlorantraniliprole and other insecticides was used. Use the nicotinsulfuron herbicide plot to avoid the use of organophosphorus pesticides to avoid phytotoxicity.
5. In the middle and late stage of pest control technology, the biological agents such as Bacillus thuringiensis and Beauveria bassiana are uniformly sprayed to control the corn larvae; according to the middle and late stage leaf spot, ear rot, corn borer, cotton bollworm, aphid and other pests In case, mixed insecticides and fungicides, control late leaf spot and corn borer, cotton bollworm, aphids and other pests. Promote the use of high-stalk crop sprayers and flying defense technology to improve the ability to prevent and control in the middle and late stages.
6. Trichogramma insect-prevention technology In the early stage of spawning of corn borer, cotton bollworm, peach aphid and other insects, 15,000 to 20,000 heads per acre, 3~5 release points per acre, divided into two Uniform release. Different areas should use local dominant bee species to improve control efficiency.
This article URL: 2018 corn major pest control technology program
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