铁岭地区白蜡窄吉丁发生规律及化防技术研究

The occurrence regularity and chemical control methods of Agrilus planipennis in Tieling area

白蜡窄吉丁是木犀科白蜡树属树木的毁灭性蛀干害虫,以幼虫在树木的韧皮部、形成层和木质部浅层蛀食危害。通过研究发现,铁岭地区白蜡窄吉丁寄主主要有白蜡、洋白蜡、水曲柳和花曲柳,其中以洋白蜡和水曲柳受害较重。该害虫在铁岭地区,每年发生1代,以不同龄期的幼虫在蛹室或蛀道里越冬。越冬幼虫4月下旬开始危害,5月中下旬进入化蛹高峰,6月上中旬达羽化高峰。6月下旬新孵化的幼虫即开始侵入树干内危害。该害虫自然扩散能力较为低下,具假死性。化学防治可采用树干封闭喷雾法、全树喷雾法、注射法等,其中以全树喷雾和树干封闭喷雾防治效果较好。

Agrilus planipennis,a highly destructive pest,which attacking ash trees,belongs to Coleoptera,Buprestoidea,Agrilus.Its larvae bore through the phloem,cambium and shallow cavity of xylem of trees,thereby cause damage to trees.In this paper,the study found that the main host trees of the emerald ash borer in Tieling area were white ash（Fraxinus chinensis）,green ash（F. pennsylvanica）,manchurian ash（F. mandshurica）and korean ash（F. rhynchophylla）,of which the green ash and manchurian ash suffered heavily. The pest had one generation per year in Tieling area,and overwintered in pupa chamber or decayed canal by different instar of larvae.Overwinter larvae emerged in the late April,Pupation peak was in mid-to-end of May and the eclosion peak was in early June.In late June,the newly hatched larvae started to invade inside the trunk.The pest＇s natural diffusion capacity was relatively low,with death-feigning. Closed spray method,the whole tree trunk spray method and injections,etc.could be used to control the pest,but the first two were more effective.