由Simbiose Agro生产的生物农药Btcontrol是巴西开发的首款防控棉铃虫产品。施用第四天的观察结果显示,其消除幼虫阶段棉铃虫的有效率达到100%。实验结果显示,棉铃虫的死亡率基本上与该产品的浓度无关。只要棉铃虫接触到喷施该产品的叶子的薄壁组织就会死亡。据悉,目前该产品已经完成所有登记以及发布程序。此 Btcontrol, a biopesticide manufactured by Simbiose Agro, is the first Heliothisi armigera product developed in Brazil. Observations on the fourth day of application showed that the efficiency of eliminating the cotton bollworm at larval stage reached 100%. The experimental results show that the mortality of cotton bollworm basically has nothing to do with the concentration of the product. As long as the bollworm touches the parenchyma of the leaves on which it is sprayed, it dies. It is reported that at present the product has completed all registration and publishing procedures. this