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选用3%呋喃丹颗粒剂,在玉米抽雄前7天,当田间出现蚜株前,结合施玉米攻苞肥,每亩根施呋喃丹1-4斤。20天后调
Selection of 3% carbofuran granules, 7 days before tasseling in corn, when the aphids before the field appeared, combined with corn seedling fertilizer, per acre root Fu carbofuran 1-4 pounds. Adjust after 20 days