深圳福田红树林害虫及其发生原因

The Pest Insects and Analysis of Its Outbreaks' Cause in Futian Mangorove,Shenzhen

报道 1994年和 1999年福田红树林害虫、其它昆虫及蜘蛛的调查结果 . 1994年在红树林采到昆虫96种及蜘蛛 7种 ,其中天敌昆虫 37种 ,占已知种类的 35 8% ;1999年采到昆虫 5 3种及蜘蛛 5种 ,其中天敌昆虫 13种 ,占已知种类 2 4% .对红树林造成为害和具有潜在危害的种类也有所增加 .Shannon_Wiener多样性指数 (H)、均匀度指数 (J)和丰富度指数分别为 :H1994 =2 47,H1999=1 6 4,J1994 =0 5 4,J1999=0 42 ,D1994 =16 1,D1999=9 37.分析结果显示 ,1999年红树林生态环境比 1994年急剧恶化 ,这是红树林害虫发生的根本原因 .

The studied results to insects and spiders, which were collected from mangrove of Futian of Shenzhen in 1994 and 1999, are reported 96 species of insects and 7 species of spiders were obtained, of which 37 species of insects, i e 35 8% of known species of insects, are enemies to pest insects in 1994 However, only 53 species of insects and 5 species of spiders were obtained, of which 13 species of insects, i e 24% of known species, are enemies to pest insects in 1999 Shannon_Wiener bio_diversity index H and evenness index J is H\-\{1994\}=2 47, H\-\{1999\}=1 64; J\-\{1994\}=0 54, J\-\{1999\}=0 42. The results showed that the environment in 1999 was worse than in 1994 The outbreak of pest insects in mangrove was due to the very bad environment