利用昆虫病原线虫与化学农药混用防治褐纹甘蔗象

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

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％）。

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 （500mg/L） and S. carpocapsae （4000 infective juveniles LJs/ 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.