Major pests of corn and their control techniques
2 Control methods according to different control methods of corn during different growth periods
2.1 Date of sowing: The prevention and control of underground pests and seed-borne diseases.
2.1.1 Rotate the crops to avoid continuous cropping. Clean the garden and reduce the initial infection source. Use strong resistance varieties.
2.1.2 Apply seed coating or use 50% phoxim EC per acre 200-250 g plus fine soil 25-30 kg, mix well and apply after ridge, or use 3% phoxim granules 4 kg for fine sand After the mixture is applied to control the underground pests.
2.1.3 Use 50% triadimefon powder 1 kg water, 5 kg seed dressing 60 kg, or 25% triadimefon 0.3% dose dressing to prevent head smut and full rot disease.
2.2 Seedling period: The main prevention and control of corn borer, Spodoptera exigua, Rotary heartworm, zinc deficiency.
2.2.1 Combine with the fixed seedlings to remove field weeds, timely burn the weeds and diseased plants and reduce the source of insects. Strengthen water and fertilizer management and promote early seedling growth.
2.2.2 Use 40% Dimethoate EC or 40% omethoate EC 2000-3000 times spray to prevent corn borer and also treat SBPH.
2.2.3 Occurrence of local larvae of Spodoptera littoralis and Locust mites, with 40% dimethoate EC 500 times or 90% trichlorfon 300 times or 50% dichlorvos 400 times. 2.2.4 25-30 kg of 0.2%-0.3% zinc sulphate solution per acre is used to prevent and treat zinc deficiency during the leaf stage of è¡©-5 leaf stage, and enhance plant resistance to disease.
2.3 heart leaf stage and ear period: to control corn borer, armyworm, sheath blight, leaf spot disease mainly, and rule bar, corn borer, thrips.
2.3.1 Strengthen field management, timely cultivating and weed control, rational fertilization, and application of phosphorus and potash fertilizers to increase plant resistance.
2.3.2 The big bell mouth period with the killing Ling No. 1 granules or 1% 1605 granules, 0.3% phoxim granules to prevent corn borer.
2.3.3 Spray control of armyworm with 90% trichlorfon 1000 times or 50% dichlorvos 2000 times, 50% phoxim EC 1000-2000 times, and 40% dimethoate 1500 times.
2.3.4 70% thiophanate-methyl or 50% carbendazim wettable powder 500-800 times spray to control sheath blight and leaf spot, can also be used 70% mancozeb wettable powder 400-500 times liquid Sprays or smears the disease to control sheath blight.
2.4 Grout maturation: to prevent the occurrence of bacterial wilt, full-blown disease and premature aging. Mainly through the selection of strong resistance varieties, to ensure the nutritional area of ​​each plant, to strengthen the management of the field, to improve the ventilation conditions of maize groups and other agricultural cultivation measures to prevent.
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