化学防治抗性棉铃虫的实践周彦成陕西省渭南地区植保植检站７１４０００渭南是陕西省主产棉区，近年来针对棉铃虫猖獗发生、抗性不断增强的实际，贯彻预防为主，综合防治，以科学用药为重点，以延缓抗性为中心，以“二高一优”为目标，作了许多有益的探索。１推广以Ｂｔ杀... Chemical control of resistant cotton bollworm practice Zhou Yancheng Shaanxi Weinan plant protection and phytosanitary station 714000 Weinan is the main producing cotton in Shaanxi Province, in recent years in view of the rampant occurrence of cotton bollworm, increasing resistance to the reality, the implementation of prevention, integrated prevention and treatment , Focusing on scientific drug use, taking delaying resistance as the center and making “two highs and one highs” the goal, made many useful explorations. 1 promotion to Bt kill ...