Techniques for pesticide control against corn rough disease and dwarf mosaic disease:
Maize rough disease and dwarf mosaic disease are transmitted by aphids and planthoppers. On the basis of seed dressing, the four-leaf stage of corn is sprayed with 3% of chlorpyrifos 2000 times + Tianda Yufeng 1500 times. It can completely prevent viral diseases; the land where virus disease occurs, with Tianda Yufeng 1000 times plus 1000 times Tianda 2116 mixed spray, has a good inhibitory effect.
How to identify and control corn large leaflet disease?
Corn leaf spot and corn leaf spot mainly harm leaves, and sometimes infest the leaf sheath and temporal lobe. In addition to harming the above parts, small spot disease can also damage the ear. These two diseases are often collectively referred to as "corn spot disease."
The typical symptoms of corn leaf spot are rapidly expanding from small lesions to long-diamond-shaped large spots, which are as long as 10-30 cm, some long spots even more than 30 cm, and sometimes several lesions are connected together to form irregularities. Large spots. The lesions were initially immersed and quickly turned into a blue-gray color, which eventually turned into brown dead spots. When the air is wet, black mold can grow on the lesion.
The symptoms of corn leaf blight are characterized by small lesions, generally no more than 1 cm in length, and are limited to between two veins, nearly elliptical, and the edge of the lesion is darker in color and russet. In addition, the number of lesions is generally more. The pathogens of large and small spotted corn are attached to the residue of the diseased plant for overwintering, or the mycelium is lurking in the diseased tissue for wintering. In the second year, the spore germination causes the first infection, and the plant after the disease A large number of conidia are produced, causing re-infection.
Prevention and treatment points: 50% diclofenac 0.5 kg, or 50% methyl thiophanate in the initial stage of the disease, or 50% detoxification 2000-3000 times + Tianda 2116 grain type 600 times + Tianda Yufeng 1500-2000 Spray with double liquid, spray 2-3 times, spray once every 10-15 days. Or spray 50-100 grams of 50% Tenda procyanidin at the end of the heart to the silking stage 1-2 times.
How to comprehensively control pests and diseases in corn fields?
Select resistant varieties, increase the application of organic fertilizers, formulate fertilization and timely sowing, rationally close planting, and cultivate healthy plants. On this basis, focus on mixing and spraying:
(1) Seed dressing, 2.5% Shile 10 g plus Tianda 2116 (special for seed dressing) 12.5 g plus 50% phoxim 10 ml water 100 ml seeded 5 kg corn, dried and sown.
(2) Spray, the first spray in the four-leaf stage of corn, the use of 98% carbendazim, 5 grams of Tianda 2116 (for strong seedlings), 25 grams plus 3% of chlorfenapyr EC 15 ml, water 15 Kilogram spray. The second spray in the corn seven-leaf stage, the use of 70% mancozeb 50 grams plus 20% triadimefon 50 ml plus 52.25% agricultural music 20 ml plus Tianda 2116 (food special) 50 g water 30 kg Spray evenly.
According to the above measures, the whole growth period of corn can be basically protected from pests and diseases , and the yield is high and the quality is good, and the yield is increased by more than 15%.
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