茶园黑刺粉虱和茶叶甲成虫与其捕食性天敌之间的关系

Relationships between Aleurocantus spiniferus Quaintance and Demotina fasciculata Baly and Their Predatory Natural Enemies in Tea Garden

为了保护和利用天敌综合防治茶园害虫,首先,比较"平阳特早"茶园季节间害虫及其天敌的种群差异,结果表明,2010年春夏与秋冬之间,黑刺粉虱、茶叶甲、异色瓢虫、三突花蟹蛛、鳞纹肖蛸、粽管巢蛛、草间小黑蛛、斜纹猫蛛、龟纹瓢虫和八斑球腹蛛的t值均小于t0.05(2.13),差异不显著.并采用灰色系统和生态位分析法,对2010年春夏季茶园2种害虫与其天敌在数量、时间、空间等方面关系进行分析,2010年春夏季黑刺粉虱的主要天敌是鳞纹肖蛸、三突花蟹蛛和八斑球腹蛛;茶叶甲的主要天敌是龟纹瓢虫、异色瓢虫和草间小黑蛛;2010年秋冬季黑刺粉虱的主要天敌是鳞纹肖蛸、三突花蟹蛛和斜纹猫蛛.茶叶甲的是异色瓢虫、三突花蟹蛛和龟纹瓢虫.黑刺粉虱(2010年4月24日)的种群聚集均数!大于2,其聚集是本身特性造成的,2个时间段所有天敌的!值都小于2,其聚集是环境中某一因素所致.

In order to conserve and utilize natural enemies for comprehensive control of pests in tea garden,the seasonal variations of population quantities of two pests and their natural enemies in＂Ping yang te zao＂tea garden were investigated systematically.The results of a paired t-testing showed that the t values of eight natural enemy numbers,i.e.Leis axyridis（Pallas）;Misumenops tricuspidatus（Fabr.）;Tetragnatha squamata（Karsch）;Clubiona japonicola（Boes.et Str.）;Erigonidium graminicolum（Sundevall）;Oxyopes sertatus（L.Koch）;Propylea japonica（Thunberg）;Theridion octomaculatum（Boes.et Str.）,were respectively 0.78,1.65,0.81,0.16,2.09,1.72,1.38 and 0.79,between the seasons of spring-summer and autumn-winter in 2010,which all were significantly lower than 2.13（t0.05 value）,indicating that there was no significant difference between numbers of two insects and their natural enemies during the two seasons of spring-summer and autumn-winter in ＂Ping yang te zao＂tea garden.The quantity,time and space framework of Aleurocantus spiniferus（Quaintance） and Demotina fasciculata（Baly） and their predatory natural enemies in 2010 spring-summer season and autumn-winter season were systematically studied using grey system analysis,ecological niche analysis and aggregated-intensity index analysis of spatial patterns.The synthetic ranking results indicated that in 2010 spring-summer season,the orders of main natural enemies of Aleurocantus spiniferus（Quaintance） and Demotina fasciculata（Baly） were respectively Tetragnatha squamata（Karsch）,Misumenops tricuspidatus（Fabr.） and Theridion octomaculatum（Boes.et Str.）,Propylea japonica（Thunberg）,Leis axyridis（Pallas） and Erigonidium graminicolum（Sundevall）.In 2010 autumn-winter season,the orders of main natural enemies of the two pests were respectively Tetragnatha squamata（Karsch）,Misumenops tricuspidatus（Fabr.） and Clubiona japonicola（Boes.et Str.）;Leis axyridis（Pallas）,Misumenops tricuspidatus（Fabr.） and Propylea japonica（Thunberg）.In addition,the results also showed that the!value of gathering average of Aleurocantus spiniferus（Quaintance） was over 2 in April 24,2010,indicating that the aggregation of pest was caused by itself.However,the ! values of gathering average of all enemies were smaller than 2,implying that the aggregation of most natural enemies was caused by different environmental factors.