| 摘要: |
| 广州小斑螟是白骨壤群落上的重要害虫。室内饲养1年可完成7代，第1代～第6代虫历时33～42d，越冬代虫历时122d。幼虫危害嫩芽、嫩叶、叶片和果实，严重受害的白骨壤林成片枯死。在白骨壤群落，各地受害嫩芽和受害叶片数量变化规律不相同，广州小斑螟种群数量消长规律与受害嫩芽和受害叶片数量变化规律成正相关，受害嫩芽和受害叶片全年平均数保持在10.8～21.5片叶（个嫩芽）/1m2样方之间，害虫数量全年平均数保持在4.4～20.4头/30个1m2样方之间。捕食性蜘蛛是控制广州小斑螟种群的重要天敌，蜘蛛数量全年平均数保持在5.9～10.8头/30个1m2样方之间，广州小斑螟种群数量与捕食性蜘蛛种群数量的比例为1：0.29～2.45，捕食性蜘蛛的比例越高，对广州小斑螟种群的控制作用就越大，害虫暴发成灾的可能性就越小。 |
| 关键词: 红树林 白骨壤 广州小斑螟（海榄雌瘤斑螟） |
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| Oligochroa cantonella Study on Avicennia marina Community in Guang Dong |
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Xu Jiaxiong
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| Abstract: |
| Oligochroa cantonell is a important insect pest on Avicennia marina community. Room feeding can completed 7 generations of a year at Guangzhou, the insect pest period of complete generation need 33～35d from first generation to sixth generation, its period of complete generation need 122d to live through the winter generation. The larva disserves twig or tender leaf or leaf or fruit, the forest of Avicennia marina dried up at graveness hurt. On Avicennia marina community, every place happened rule of harm twig quantity and harm leaf quantity is disaffinity, the quantity of Oligochroa cantonell and the harm twig quantity with leaf a quantity positive related, the harm twig and the harm leaf keep in between 10.8 leaf ( twig ) ～21.5 leaf (twig) / one centiare at a year average, the insect pest amount keep in between 4.4 caput ～20.4 caput / 30 entries one centiare at a year average. The predaceous spider is importance natural enemy to cortrol Oligochroa cantonella , the spider amount of average achieve in between 5.9 caput ～10.8 caput / 30 entries one centiare, Oligochroa cantonella amounts and the spider amounts proportion 1: 0.29-2.45, the comparison that predaceous spider is more high, growing the control function of Oligochroa cantonell population more big, growing ability the break out function of the amount of Oligochroa cantonella more small. |
| Key words: mangrove,Avicennia marina ,Oligochroa cantonella（Acrobasis sp.） |
