刺桐姬小蜂发生习性及其虫瘿形成分析

刺桐姬小蜂Quadrastichus erythrinaeKim是新发现的重要入侵害虫,在广东省深圳地区普遍发生且危害严重,受害植株超过10000株。寄主按受害程度依次为:杂色刺桐Erythrina variegata、金脉刺桐E.variegatevar.orientialis、鸡冠刺桐E.cristagalli和龙牙花E.corallodendron。移栽2年内的刺桐树受害严重。根据虫瘿形状,将其分为球形虫瘿、卷叶形虫瘿、肥厚叶虫瘿、分散虫瘿、粗柄形虫瘿、嫩枝肿大虫瘿、花蕾肿大虫瘿并对其形成过程进行分析。首次报道了刺桐姬小蜂为害鸡冠刺桐花蕾。刺桐姬小蜂在深圳无休眠和滞育现象,常年发生。

Occurrence of erythrina gall wasp, Quadrastichus, and the prosess of the fall shaped

The erthrina gall wasp,Quadrastichus erythrinae Kim,was a new important invasive pest in continental China.It occurred commonly and caused severe damage in Shenzhen,Guangdong Province.More than 10 000 coral trees have been infected.The species of coral trees according to the degree of damage were:Erythrina variegata>E.variegate var.orientialis>E.cristagalli>E.corallodendron.The coral trees which were transplanted within 2 years were damaged heavily.The galls were differentiated with sphaeroid gall,curled gall,fleshy gall,dispersal gall,thick-stem gall,twig-swollen gall and bud-swollen gall according to their shape.The prosess of the gall shaped was analysed.It was firstly reported that buds of E.cristagalli were damaged.The wasp did not diapause in Shenzhen,and occurred in whole year.