油菜角野螟发生规律及防治对策研究

Research on Occurrence Rule and Control Measures of Angle Borer of Rape

近年来油菜角野螟对西宁油菜为害加重,成为油菜生产主要害虫之一。该试验调查了油菜角野螟田间发生规律、为害特性、生物学特性,并进行了各种防治技术的试验示范。结果表明:油菜角野螟在西宁地区1 a发生1代,零星有2代出现;油菜角野螟成虫在7月油菜角果期为盛发期;菜角野螟在西宁地区普遍发生,浅山地区发生较重,川水地区中度发生,脑山地区零星发生;适当早播可减轻角野螟的为害;依据"以防为主,综合防治"的原则,当油菜花期至角果初期百株卵块累计达40块以上时即可进行化学防治。防治适期以角果初期为主,卵块较多油菜田块可连防2次,间隔7 d。

In recent years, Xining rape angle borer damage on the increase,a major pest of rapeseed production. The rape angle borer field occurrence, damage characteristics, biological characteristics and control techniques for a variety of experiments and demonstrations were studied. The results showed that rape angle borer in Xining 1 a place a generation, scattered with 2nd generation occurs; rape angle borer adults in July rape pod period Sheng period; food angle borer in Xining widespread, shallow mountain region than the heavy, moderate occurrence of Sichuan water areas, sporadic cerebral Mountain region; appropriate angle borer early sowing could reduce the damage; basis ＇in case--based, comprehensive prevention and control ＇principle, when the rape to the pod of the initial one hundred egg masses totaled 40 above can be carried out chemical control. Optimum control period to the early pod--based, egg masses can be even more anti--rape plots 2, interval 7 d.