棉农谈:这些年棉铃虫厉害,不易治住,其中一个没有引起广泛注意的原因是现在粉剂药少,绝大多数用乳剂喷雾,单打一。一是喷雾不比喷粉容易喷周到。二是棉铃虫常躲在花蕾、花朵、棉铃内和叶背面,喷雾不一定能喷到虫子身上。喷雾后水一干,虫子再从那里爬过,身上粘得少,而粉剂就 Cotton Farmer Talks: In these years, the bollworm is powerful and not easy to live with. One of the reasons why it has not attracted much attention is that powder medicine is now less and most of them are sprayed in the form of a single emulsion. First spray spray better than sprayed around. Second, cotton bollworm often hiding in the buds, flowers, cotton boll and leaf back, the spray may not be able to spray insects. After the spray a little water, insects and then climb from there, the body less sticky, and powder on it