棉花苗期,常遭受蚜的危害。喷雾防治效果虽在90％以上,但同时也大量杀伤天敌,涂茎、滴心,可保护天敌,控制蚜害。 一、涂茎:用50％久效磷乳油或40％氧化乐果乳油1份,聚乙烯醇0.1份,水5～7份配制。先将乳状聚乙烯醇加入足量的50～60℃水,慢慢加入内吸性农药,搅拌均匀即可使用。涂茎时,可用大号毛笔或细木棒端部缠纱布团或棉球,蘸上药液在棉 Cotton seedling, often suffer from the harm of aphids. Although the spray control effect of more than 90%, but also a large number of natural enemies kill, painted stems, drops of heart, can protect natural enemies, control aphid damage. First, the coating stem: with 50% monocrotophos or 40% omethoate 1, 0.1 parts of polyvinyl alcohol, 5 to 7 parts of water preparation. First, add a sufficient amount of milky polyvinyl alcohol water 50 ~ 60 ℃, slowly add systemic pesticides, stir can be used. Stem, you can use large brush or stick end of the stick wrapped gauze or cotton ball, dipped in liquid cotton