刺桐姬小蜂的发生、为害及种群动态——以泉州市洛江区为调查对象

Infestation and population dynamics of Quadrastichus erythrina Kim

对洛江区刺桐姬小蜂的发生为害及种群动态的研究结果表明:洛江区主要有鸡冠刺桐、刺桐和金脉刺桐,3种刺桐均可被刺桐姬小蜂为害。全区刺桐种植面积约33hm^2,已有390多株受刺桐姬小蜂为害,受害面积较广的刺桐树集中在较繁华的万虹公路两侧。刺桐受害后,树叶卷曲、膨大,不同刺桐树对刺桐姬小蜂的抗性差异显著。刺桐姬小蜂的世代重叠比较严重,温度越高,其发育历期越短。洛江区属亚热带海洋性季风气候,夏季天气炎热,大部分气温在27～35℃之间,研究表明刺桐姬小蜂的发育历期约为21 d。

The research of Quadrastichus erythrina Kim infestation and population dynamics in Luojiang area show that 3 main species of erythrina in Luojiang area including E.cristagalli, Erythrina variegata and E.variegate var. rientialis all can be infested by Quadrastichus erythrina Kim. More than 390 plants has been infested on the entire 33 hm2 planting area. The wide damaged area is on the both sides of downtown Wanhong Road. The leaves will curl and swell when the tree is infected. There are significant differ- ence between the resistances of different erythrina trees to Quadrastichus erythrina Kim. Erythrina＇s overlapping generations is quite serious. The higher the temperature is, the shorter development calendar period of Quadrastichus erythrina Kim is. Luojiang belongs to subtropical marine monsoon climate with hot summer. Most of the day temperature is between 27-35℃, therefore Quadrastichus ery- thrina Kim＇s development period is about 21d.