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Spatial distribution pattern of Agrilus auriventris Saunders (Coleoptera:Buprestidae)
Author(s): 
Pages: 805-809
Year: Issue:  5
Journal: ACTA ENTOMOLOGICA SINICA

Keyword:  柑桔爆皮虫空间分布图式聚集度树势攻击策略;
Abstract: 通过调查柑桔爆皮虫成虫羽化孔的分布,经空间分布型检验和聚集度指标的测定以及Taylor幂法则和m*-m(Iwao)回归分析,结果表明,柑桔爆皮虫的羽化孔在柑桔树树体内和桔园内均呈聚集分布:在枯树内呈负二项分布,在半枯树内呈负二项分布或奈曼A型分布,在桔园内呈负二项分布,在树体内和桔园内分布的基本成分均为为个体群,个体间相互吸引.树势较差的柑桔树容易受柑桔爆皮虫危害,在树势强的树体内不能完成世代发育.因此,柑桔爆皮虫采用多次聚集攻击的策略攻击寄主.在桔园内聚集危害部分寄主,在树体内聚集危害寄主主枝的中下部,主枝的死亡导致整株树势下降,下一代虫源进而再次攻击寄主,在树势下降的树体内柑桔爆皮虫完成世代发育并羽化出孔,成虫继续为害健康的柑桔树.
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