【摘要】 星菱背网蝽Eteoneus sigillatusDrake et Poor是危害桂花Osmanthus fragrans的重要害虫,在园林生态系统中发生普遍。采用室内饲养与野外观察相结合的方法,观察分析星菱背网蝽的危害、生物学特性及种群动态。结果表明:星菱背网蝽在昆明市仅危害桂花,若虫主要为害老叶,成虫同时为害老叶和嫩叶,以刺吸方式在叶背危害;该虫在昆明地区1 a发生7～8代,以卵和成虫在寄主叶片和枯枝落叶中越冬,3月上旬始出第1代若虫,若虫5龄,历期约18 d,完成1个世代需43.3 d;其危害期为3—11月,种群数量在3月下旬和7月中旬分别达到高峰。该虫被草蛉捕食的现象较为常见,夏季降雨对其种群数量具有一定抑制作用。更多还原

【Abstract】 Eetoneus sigillatus Drake et Poor is an insect seriously harmful to Osmanthus fragrans Lour.,commonly in landscape ecosystem.In order to reveal its occurrence regularity in Kunming,we combined indoor breeding and field observation to investigate the damage,biological characteristics and population dynamics of this lace bug.The results showed that E.sigillatus only harmed O.fragrans and sucked the juice on the underside of leaves.Nymphs of E.sigillatus always fed old leaves,while adults fed both old leaves and the young E.sigillatus had 7 to 8 generations a year in Kunming.The eggs and adults overwintered respectively in host leaves and litter.The nymphs of first generation emerged in the beginning of March.The nymphs had 5 instars,and the nymph stage was about 18 days.The whole stage for E.sigillatus was about 43.3 days.The pest would cause damage to its host from March to November,and its population reached a peak in the late March and mid-July,respectively.It was common that the lace bug was fed by lacewings,and its population could be affected by rainfall in the summer.更多还原