利用昆虫病原线虫与化学农药混用防治褐纹甘蔗象

褐纹甘蔗象是棕榈科植物和甘蔗的新入侵危险害虫。本研究利用昆虫病原线虫小卷蛾斯氏线虫All品系与毒死蜱、吡虫啉混用防治褐纹甘蔗象。将4000条／ml感染期线虫与48％毒死蜱EC（1000mg／L）、70％吡虫啉（500mg／L）混合施用于国王椰子，7d后对幼虫的防效为96％，明显优于单剂毒死蜱（68．96％）、单剂吡虫啉（0）和小卷蛾斯氏线虫（68．42％～76．52％）的防效；混剂处理7d对成虫的防效为88．89％，亦明显优于单剂毒死蜱（72％）、单剂吡虫啉（2．50％）和小卷蛾斯氏线虫（27．78％～52．63％）。

Combined Efficacy of Entomopathogenic Nematode Steinernema carpocapsae All and Pesticide against Rhabdoscelus lineaticollis (Heller)

This paper reported results of combined efficacy of chlorpyrifos,imidacloprid and entomopathogenic nematode Steinernema carpocapsae All against Rhabdoscelus lineaticollis,a new invasive pest attacking palms and sugarcanes.The experiment design included combined use of 48% chlorpyrifos EC(1000 mg/L),70% imidacloprid(500 mg/L) and S.carpocapsae(4000 infective juveniles IJs/ml), and alone use of each of the above agents.After 7 d,mortality of weevil larvae in the combined treatment(98%) was significant higher than those in chlorpyrifos (68.96%),imidacloprid(0) and S.carpocapsae(68.42%-78.57%) used alone.Mortality of weevil adults in the combined treatment(88.89%) was also significant higher than those in chlorpyrifos(72%),imidacloprid(2.50%) and S.carpocapsae(27.78%52.63%) used alone.