保铃棉不是无虫棉。保铃棉主要高抗鳞翅目害虫的低龄幼虫,如棉铃虫、红铃虫、玉米螟等。但对其大龄(3龄以上)幼虫抗性减弱,必要肘,还需用药。特别要注意其它作物,如瓜套棉田西瓜上大龄幼虫转移到棉花上危害,达防治指标的要及时用药。保铃棉对其它害虫,如棉蚜、红蜘蛛、盲蝽等害虫不产生任何抗性,因此这些害虫达到防冶指标应及时采取相应防治技术。一、棉蚜:①用久效磷、甲胺磷或氧化乐果150—200倍液,每亩用药1-1.5千克,喷滴在棉苗顶心;②用久效磷或甲胺磷25克,聚乙烯醇2 Boll cotton is not insect-free cotton. Bollworms main high lepidopteran pests of young larvae, such as cotton bollworm, pink bollworm, corn borer and so on. But for its older (3rd instar larvae) larvae weakened, the necessary elbow, need medication. Special attention should be paid to other crops, such as cupping cotton watermelon on older larvae transferred to the cotton on the hazard, up to the prevention and treatment of indicators to be timely medication. Cotton bollworm does not produce any resistance to other pests, such as cotton aphid, spider mite, red bugs and other pests, so these pests to anti-smelting indicators should take appropriate control techniques. A cotton aphid: ① with monocrotophos, methamidophos or omethoate 150-200 times the liquid, 1-1.5 kg per acre, drops in the top of the cotton seedling; ② monocrotophos or methamidophos 25 G, polyvinyl alcohol 2