Detailed Explanation of Pest and Disease Control Methods in Summer Corn Cultivation
How do you control pests and diseases when growing summer corn? Please explain the methods. For summer corn cultivation, the following methods can be used for pest and disease control: 1. Seed treatment. For every 100 kg of seed, use 100-150 ml of Manshijin + 100-200 g of Liangsui (or Likerxiu) + 170 ml of Shuaimiao for seed coating. This can control seedling blight, root rot, stem base rot and other corn seedling-stage diseases, underground pests and head smut.
How do you control pests and diseases when growing summer corn? Please explain the methods.
For summer corn cultivation, the following methods can be used for pest and disease control:
1. Seed treatment
For every 100 kg of seed, use 100-150 ml of Manshijin + 100-200 g of Liangsui (or Likerxiu) + 170 ml of Shuaimiao for seed coating. This can control seedling blight, root rot, stem base rot and other corn seedling-stage diseases, underground pests and head smut.
2. Control of pests at the seedling stage
If armyworm, cotton bollworm or meadow moth pests cause damage at the seedling stage, spray the leaves before the pests reach the 3rd instar with a 3000-fold dilution of Jinbiao or organophosphorus insecticides.
3. Chemical weed control
① Soil sealing: after sowing corn and before emergence, apply 70-80 ml of 96% Jinduer plus 100-130 g of 90% Gaisalin or 150-200 ml of 40% Yiyou water per mu for soil sealing treatment.
② One sealing and one killing: if some weeds have already emerged after corn sowing and before emergence, before corn emergence the soil sealing agent can be mixed with Gramoxone (100-150 ml per mu) and applied.
③ Early post-emergence stem and leaf treatment: after corn emergence, when broadleaf weeds have 2-4 leaves and grass weeds have fewer than 3 leaves, spray the leaves with 100-120 ml of 55% Gengjie per mu.
④ Inter-row weed control: after the 6-leaf stage of corn, if weeds still cause damage in the field, use 150-200 ml of Kewuzong per mu for directed inter-row spraying.
4. Pests and diseases at the middle and late stages
1. Corn borer:
① Physical control method: set up high-pressure mercury lamps near villages for trapping and killing.
② Biological control method: use Trichogramma or sex pheromone lures for control.
③ Chemical control method: at the large trumpet stage of corn, use phoxim poisoned soil (0.5 kg of 50% phoxim emulsifiable concentrate, mixed with 40 kg of poisoned soil, 3-3.5 kg per mu) (or 200 ml of BT emulsion per mu, mixed with a small amount of water and 5-7.5 kg of fine sand) and place it in the corn whorl; a 3000-fold dilution of Jinbiao (or a 1000-fold dilution of Meichu) can also be used for leaf spraying.
2. Northern leaf blight and southern leaf blight:
Before disease onset, spray the leaves with a 600-fold dilution of 75% Daconil for prevention, once every 7-10 days, for a total of 2-3 sprays; at the early stage of disease occurrence, spray the leaves with a 3000-fold dilution of Aimiao, once every 10-15 days, for a total of 2-3 sprays.
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