1. Weeding and disease prevention: Fields that do not use herbicide before sprouting can be used to control weeds after seedlings to pre-foliate leaves and leaves, with 23% Niacin. Torazine 100-150 ml Watered 30- 50 kilogram spray control, while adding imidacloprid, chlorpyrifos, avermectin or pyrethroid insecticide mixed spray, can treat SBPH, corn Fuma and other pests. The control of corn seedling blight, the three leaves before the use of carbendazim or thiophanate-methyl spraying corn stem base for prevention and treatment.
2. Corn rough dwarf disease: This disease is a viral disease transmitted by the planthopper, which has been severe in recent years. It is expected that the occurrence of corn rough dwarf disease in our county this year will be moderately mild. Among them, the garlic field and spring corn will be moderately heavy.
Control period: from corn planting to pre-emergence and before corn 6 leaf (maize 7 to 7 leaf stage is sensitive leaf disease sensitive disease leaf age, 10 leaf safety leaf age) And join the disease to prevent corn rough dwarf disease. Control methods: Combine the use of herbicides, and add insecticides such as imidacloprid to control SBPH, so as to achieve the effect of pest control and disease prevention.
3, corn seedling blight. Moderately lighter, and some plots tend to occur. After the wheat field, there is a large area of ​​the field, and the seedling period coincides with the rainy season, which can easily cause seedling blight.
Control methods: (1) Seed dressing before sowing, with 2% tebuconazole seed dressing 0.2%. (2) Pay attention to the application of phosphorus and potassium fertilizers and zinc fertilizers. (3) Chemical control: Potassium dihydrogen phosphate can be sprayed with 70% of the 800-fold solution of ketamine or 20% of triadimefon 1000 times. At intervals of 7 days, spray twice.
4. A generation of corn mash: A generation of corn mash mainly damages spring corn and garlic waxy corn. As of June 3, the black light totaled 13 corn pods. Due to the small planting area of ​​spring corn and garlic and waxy corn and the concentrated spawning of adult larvae, the damage of larvae is relatively aggravated and is expected to occur moderately this year, with an area of ​​about 0.8 million mu.
Control indicators: Mosaic strain rate 10%.
Control methods: Use 5% phoxim granules, half a catty per acre, and 6-8 pounds of fine sand, sprinkle into the heart of corn.
5, the second generation of armyworm. The second-generation armyworm is the main pest in the interplanting corn field. The larvae eat the leaves of corn and enter the gluttony period after the third instar. When the second generation of the armyworms occurs, the leaves of the corn seedlings are eaten, resulting in an outbreak. The black light of our county began to see the moth on May 6. On June 3, a total of 37 moths (1:1 male to female ratio) were mothed, and the amount of moths was close to normal. Combined with meteorological conditions, the armyworm has a moderate degree of occurrence, with an area of ​​about 0.3 million mu.
Control indicators: Interplanting corn 100 strains have 10 insects.
Control methods: 50% phoxim 1500 times spray or control with pyrethroid pesticide spray.
6, two A. moth and land tiger. As of June 3rd. The black light of the county plant protection station did not induce two adults of A. moth; a total of 31 small tigers were attracted and the amount of moths was higher than usual. It is expected that this year will happen mildly.
Prevention methods: First, with water irrigation, with 48% chlorpyrifos per acre pound, with irrigation when poured into the field; can also spray corn seedlings, the sprayer nozzle unscrew, along the ridge-by-slice spray irrigation liquid. Pay attention to the amount of liquid to ensure penetration into the corn roots around.
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