山东广翅蜡蝉在青岛地区的发生规律及产卵习性

Occurrence regularity and oviposition habits of Ricania shantungensis in Qingdao region,Shandong province

为明确山东广翅蜡蝉Ricania shantungensis Chou et Lu在青岛地区的发生情况,于2017年4月至2018年12月,采用踏查法调查该虫在山东省青岛市的寄主范围,并采用套网袋和定点观察相结合的方法调查其年生活史及成虫产卵习性。结果表明,山东广翅蜡蝉在青岛地区的寄主有27种,其中木本植物25种,草本植物2种。山东广翅蜡蝉在青岛地区1年发生2代,以卵越冬,翌年春天5月初孵化,越冬代成虫发生期为7月1日至8月10日;第1代成虫发生期为9月23日至12月4日。第1、2代卵的高峰期分别出现于7月25日和10月30日。成虫产卵对黄栌Cotinus coggygria Scop.具有明显的嗜好性,且喜将越冬卵产在东向和南向枝条上,不仅可产卵于新生嫩枝,也可以产卵于叶片主脉。本研究结果可以为青岛乃至山东地区山东广翅蜡蝉防治提供依据。

In order to clarify the occurrence regularity of Ricania shantungensis Chou et Lu in Qingdao region,Shandong province,the host range in Qingdao region was investigated by random-searching-method,and the annual life history and oviposition habit were investigated by bagging-method combined with spot-investigation from April 2017 to December 2018.The result showed that there were 27 kinds of host plants of R.shantungensis in Qingdao region,including 25 woody hosts and two herb hosts.R.shantungensis occurred two generations each year,and overwintered with eggs.The overwintering egg was hatched on early May of the next year.The adult of overwintering generation occurred from 1st July to 10th August;the adult of first generation occurred from 23rd September to 4th December.The oviposition peak of the first and second generation separately appeared on 25th July and 30th October.The adult preferred to lay eggs on Cotinus coggygria Scop.and lay overwintering eggs in branches located in south and east side of the tree.R.shantungensis not only lay eggs on new shoots but also in the thick main vein of the leaf.These results will provide reference for control of R.shantungensis in Qingdao region,even in Shandong province.