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在棉铃虫大发生地区种植抗虫棉能省工省时、增产增收,降低棉花生产成本,保护生态环境,近几年已在全国广泛推广应用,受到棉农的欢迎。但有些棉农反映抗虫棉整个生育期生长良好,可在田间却发现有的抗虫棉不抗虫,仍有棉铃虫发生,而且有的棉株上棉铃虫和其他害虫还十分严重。1原因
Cotton bollworm areas where planting insect-resistant cotton can save time, increase production, reduce cotton production costs and protect the ecological environment in recent years has been widely used in the country, welcomed by cotton farmers. However, some cotton farmers reported that the growth of insect-resistant cotton during the whole growth period was good. Some insect-resistant cotton was found not to be resistant to insect pests in the field, and still some cotton bollworm occurred. Some bollworm and other pests on cotton plants were still very serious. 1 reason