| 摘要: |
| 白缘蛀果斑螟和荔枝异形小卷蛾是红树林木榄+桐花树群落上的重要害虫，在广东省局部区域的红树林保护区，已经对木榄造成严重危害。白缘蛀果斑螟1年完成4代，第1～3代虫历时48～66d，越冬代历时180d。荔枝异形小卷蛾1年完成5代，第1～4代虫历时39～44d，越冬代历时188d。在木榄+桐花树群落上，白缘蛀果斑螟和荔枝异形小卷蛾幼虫均危害木榄的花萼和胚轴，荔枝异形小卷蛾能够迁移到桐花树上危害桐花果实。在木榄+桐花树群落上，白缘蛀果斑螟成虫占54%，荔枝异形小卷蛾成虫占46%。林间世代重叠，以幼虫和蛹越冬。在4月下旬～5月中旬，受害花萼和受害胚轴数量有一个高峰期，7月上旬～10月中旬，受害花萼和受害胚轴数量有一个明显的低值期。白缘蛀果斑螟和荔枝异形小卷蛾种群数量消长规律与受害花萼和受害胚轴的数量变化规律成正相关, 白缘蛀果斑螟和荔枝异形小卷蛾种群数量也相应有一个高峰期和一个低值期。白缘蛀果斑螟和荔枝异形小卷蛾与捕食性蜘蛛数量的比例为1：0.30，捕食性蜘蛛数量的比例偏低。寄生性天敌对钻蛀性害虫的控制作用更加重要。 |
| 关键词: 红树林 木榄 桐花树 白缘蛀果斑螟 荔枝异形小卷蛾 |
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| Assara albicostalis and Cryptophlebia ombrodelta Study on Bruguiera gymnorrhiza +Aegiceras corniculatum Community in Guang Dong |
|
Xu Jiaxiong
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| Abstract: |
| Assara albicostalis and Cryptophlebia ombrodelta is an important insect pest on Bruguiera gymnorrhiza + Aegiceras corniculatum community of mangrove, at the mangrove of part field in Guang Dong, the insect pest already work graveness harm to Bruguiera gymnorrhiza, Assara albicostalis at Bruguiera gymnorrhiza tree completed 4 generations of a year, Assara albicostalis period of complete generation need 48～66d from first generation to third generation, Assara albicostalis period of complete generation need 180d to live through the winter. Cryptophlebia ombrodelta at Bruguiera gymnorrhiza tree completed 5 generations of a year, Cryptophlebia ombrodelta period of complete generation need 39～44d from first generation to four generation, Cryptophlebia ombrodelta period of complete generation need 188d to live through the winter. On Bruguiera gymnorrhiza + Aegiceras corniculatum community, the larva of Assara albicostalis and Cryptophlebia ombrodelta harms calyx or fruits, Cryptophlebia ombrodelta can harms fruits from Bruguiera gymnorrhiza to Aegiceras corniculatum, On Bruguiera gymnorrhiza + Aegiceras corniculatum community, the imago of Assara albicostalis account for occupy 54%, the imago of Cryptophlebia ombrodelta account for occupy 46%. The insect pest generation is layer after layer, use the larva and the pupa live through the winter, at 4 month of the last ten days of a month ~ 5 month of the middle ten days of a month, the amounts of harmed calyx and harmed fruits have one high period of time, at 7 month of the middle ten days of a month ~ 10 month of the middle ten days of a month, the amounts of harmed calyx and harmed fruits have one low period of time. The population quantity of Assara albicostalis and Cryptophlebia ombrodelta and the harm calyx quantity with fruits a quantity positive related, the population quantity of Assara albicostalis and Cryptophlebia ombrodelta also corresponding have one high period of time and one low period of time. Assara albicostalis and Cryptophlebia ombrodelta amounts and the spider amounts proportion 1: 0.30, the spider amounts proportion of forest is small. The parasitoid is more important to the control function of the stem borer’s insect pest. |
| Key words: mangrove,Bruguiera gymnorrhiza, Aegiceras corniculatum, Assara albicostalis, Cryptophlebia ombrodelta |
