桔潜蛾及其天敌的生态位

Niches of citrus leafminer and its natural enemies

通过调查福建农业大学生产处柑桔园桔潜蛾 Ｐｈｙｌｌｏｃｎｉｓｔｉｓ ｃｉｔｒｅｌｌａ Ｓｔａｉｎｔｏｎ 及其天敌的分布情况，测定其时间和空间生态位宽度、重叠和相似性比例，分析了桔潜蛾与其天敌空间上的同域性和时间上的同步性，即时间和空间上的“跟随”作用．寄生性天敌群子强于捕食性天敌群子，表明在自然环境中寄生性天敌群子对桔潜蛾的控制作用强；捕食性天敌小花蝽 Ｏｒｉｕｓ ｓａｕｔｅｒｉ虽然食谱生态位宽，但生态位重叠却小，说明这种天敌尽管分布广泛，可在时间和空间上没能有效“跟随”害虫的发生，对害虫控制作用不大；寄生性天敌短腹桔啮小蜂 Ｃｉｔｒｏｓｔｉｃｈｕｓ ｐｈｙｌｌｏｃｎｉｓｔｏｉｄｅｓ （ Ｎａｒａｙａｎａｎ）与桔潜蛾在时间上的同步性和空间上的同域性均优于其它天敌，为优势天敌。

The spatial and temporal niche breadthes, overlaps and proportional similarity were measured for citrus leafminer ( Phyllocnistis citrella Stainton ) and its natural enemies based on their distribution investigated in the orchard in Fujian Agricultural University. Meanwhile the sympatry and synchrony between pest and its natural enemies were analyzed. The effect of the natural enemies were assessed according to the analysis, which revealed that the parasitoids played more si...