防治棉花害虫的最佳药剂———多虫清多虫清（Ｐｏｌｙｔｒｉｎ－ｃ）４４％乳油是瑞士诺华公司专门为对付抗性棉花害虫而研制的复配制剂，其有效成份主要是氯氰菊酯和克虫磷。这种复配制剂的最大优点是害虫不易对其产生抗性。由于棉花上的棉铃虫和红铃虫是最易产生抗性的... Polytrin-c 44% EC is the compounded formulation specially developed by Novartis AG to deal with the resistant cotton pests. Its active ingredients are mainly cypermethrin and g Insect phosphorus. The biggest advantage of this compound is that pests are not resistant to it. Because the cotton bollworm and pink bollworm is the most resistant ...