How hard is it for corn to grow smoothly?
Need to dodge
Corn borer
Meadow nocturnal moth
Thrips, armyworms, cotton bollworms,
two-point night moth, underground pests,
Brown spot disease, small spot disease, corn southern rust
……
Corn is an important food crop in our province, diseases and insect pests are an important biological disaster factor affecting the yield and quality of corn, so we must do a good job in the prevention and control of major diseases and insect pests, achieve pesticide reduction and efficiency, and ensure the safety of corn production!
01
Prevention and control strategies
In view of the key diseases and insect pests in different growth stages of corn, with the support of green prevention and control technology, vigorously promote the integration of professional unified prevention and control and green prevention and control, implement straw crushing and returning to the field, select (resistant) disease and insect varieties, seed treatment, disease and pest control at the seedling stage, red-eyed bee pest control and disease and pest control technology in the middle and late stages, so as to achieve cost savings and efficiency and ensure the safety of corn production.
02
Prevention and control priorities for different reproductive periods
Sowing period: underground pests, thrips, seedling blight, powdery mildew, root rot, coarse shrinkage and other diseases and insects.
Seedling stage: second-generation armyworm, grassland night moth, two-point nocturnal moth, cotton bollworm, gray planthopper, beet night moth and other diseases and insects.
From the mouth of the trumpet to the filling stage: corn borer, grassland moth, cotton bollworm, armyworm, aphid, peach borer borer, corn southern rust, small spot disease, brown spot disease, curved spore leaf spot disease, ear rot, stem rot, large spot disease and other diseases and insects.
03
Prevention and control technical measures
Major pest control technologies
1． Corn borer: the straw is crushed and returned to the field to reduce the source base of overwintering insects; the adult insects release red-eyed bees to extinguish eggs in the early stage of egg laying. At the beginning of the occurrence of the larvae, spray biological pesticides such as Bacillus thuringiensis and Albicans, or spray insecticides such as chlorantranoid benzamide, high-efficiency cypermethrin, methylaminoavermectin benzoate, and carnitylhydrazide.
Corn borer
2． Underground pests, thrips, aphids, gray planthoppers, beet moths, armyworms, cotton bollworms and other seedling pests: seed coating agents such as thiamethoxine, imidacloprid, chlorpyrifos benzamide or bromocyanosomidamide are selected for seed treatment.
Thrips
Beet nocturnal moth
3． Root rot, powdery mildew and stem rot, etc.: promote disease-resistant (resistant) varieties; seed coating agents such as lamella, methyl fine nail cream, phenoxymethicazole or pyrazole ether ester are selected for seed treatment.
Corn stem base rot
4. Two-point nocturnal moth: stubble extermination or stubble removal before sowing; clear the cover on the corn sowing ditch; select insecticide sprays such as chloranthroid benzamide, methylamino avermectin benzoate or thiamethia and fluchlorocyanide, bait trap or sprinkle granules for control.
Two o'clock nocturnal moths
5. Grassland night moth: strengthen the protection and utilization of natural enemies; use physical and chemical enticing technology to trap adult insects; seize the best period for the prevention and control of young larvae, choose to spray biological pesticides such as Suyun Jin bacillus and kale nocturnal moth and other biopesticides in the early stage of egg hatching, and select emergency prevention and treatment drugs recommended by the Ministry of Agriculture and Rural Affairs for grassland night moths, such as methylamino avermectin benzoate, chlorhexabenzamide, etc., to carry out scientific prevention and control in a timely manner.
6. Armyworm: timely removal of fieldside weeds, larvae before 3 years of age to apply drug control, in the armyworm 4 eggs hatching early spray suyunjin bacillus preparation, young larvae can be used to kill urea control, or optional use chloranthrine benzamide, high-efficiency cypermethrin or acetylmethanes and other insecticide spray control.
Armyworm
7． Maize leaf spot diseases: select disease-resistant (disease-resistant) varieties, reasonable dense planting, scientific fertilization. At the end of the heart leaf of maize, fungicides such as propyclic acetolate, oxime pentazole, flurazole, fomers, or daisen ammonium can be sprayed again within 7-10 days depending on the incidence. The area where brown spot disease recurs is controlled by medication in the 8-10 leaf stage of maize. The addition of brassinolide, amino oligosaccharide, etc. can reduce the amount and increase efficiency.
8． Corn aphids: thiamethoxine, imidacloprid and other seed coating agent seeds were selected for treatment; during the male stage of maize extraction, aphids were sprayed with thiamethoxine, imidacloprid, cypermethrin and other agents for control.
Corn aphids
9． Cotton bollworm: the release of borer yellow red-eyed wasp in the early stage of egg laying to extinguish eggs, or egg hatching is selected to use spray control such as Bacillus thuringiensis, methylaminoavermectin benzoate, chlorantranoid benzamide and so on.
Cotton bollworm
Comprehensive prevention and control measures for diseases and insects throughout the process
1. Straw treatment, deep ploughing stubble eradication technology. Comprehensive utilization of straw, crushing and returning to the field, deep ploughing of soil, and eradication of stubble before sowing are adopted to reduce the base of diseases and insect sources.
2. Adult booby trap technology. During the onset of pest adults, traps are carried out using insecticidal lamps or sex traps.
3. Seed treatment technology. According to the underground pests, soil-borne diseases and seedling-stage pest species, the appropriate seed coating agent is selected to implement unified seed treatment.
4. Pest control technology at the seedling stage. According to the occurrence of second-generation armyworms, thrips, gray planthoppers, beet nocturnal moths and cotton bollworms at the seedling stage, appropriate insecticide sprays are selected for control. According to the occurrence of underground pests and two-point nocturnal moths, appropriate agents are selected, combined with watering, spraying the base of the stem or sprinkling, flushing and other methods of prevention and control. Plots using nimonosulfuron herbicides, avoid the use of organophosphorus pesticides to avoid drug damage.
5. Disease and pest control technology in the middle and late stages. At the end of the heart leaf, biological agents such as Thuringiensis and Albicans are uniformly sprayed to control pest larvae such as corn borer; according to the occurrence of diseases and insects such as leaf spot disease, ear rot, jade rice borer, cotton bollworm, armyworm and aphid, rationally mix insecticides and fungicides to control the pests and diseases in the middle and late stages. Promote the use of high gap sprayers and navigation operations to improve the ability of prevention and control operations in the middle and late stages.
6. Red-eyed bee insect control technology. In the initial egg laying period to the peak egg stage of insects such as corn borer, cotton bollworm and peach borer, the red-eyed wasp is released, with 15,000 to 20,000 heads per mu, and 3 to 5 release points are set per mu, which are released in two unified stages.