合肥秋冬季茶园天敌对假眼小绿叶蝉和茶蚜的空间跟随关系

为了合理保护和利用天敌及科学地选取抽样方法,开展了合肥地区秋冬季4个品种茶园假眼小绿叶蝉Empoasca vitisGothe和茶蚜Toxoptera aurantii Boyer与其天敌之间空间关系研究,运用地学统计学方法求得天敌和害虫各自的变程,用灰色关联度分析方法分析害虫与天敌变程的关联度,关联度值越大的天敌在空间上对害虫的跟随关系越密切。分析了2010年9月28日至11月25日期间假眼小绿叶蝉和茶蚜数量最少的舒茶早茶园和二种害虫数量最多的平阳特早茶园天敌对害虫空间上的跟随关系,结果表明,二种茶园的假眼小绿叶蝉和茶蚜及其4种主要天敌均为聚集分布,舒茶早茶园与假眼小绿叶蝉空间上跟随关系密切的前二位天敌是斜纹猫蛛Oxyopes sertatus L.Koch(0.8594)和草间小黑蛛Erigonidium graminicolum Sundevall(0.8397),与茶蚜空间上跟随关系密切的前二位天敌是草间小黑蛛(0.7448)和斜纹猫蛛(0.7433);平阳特早茶园与假眼小绿叶蝉空间上跟随关系密切的前二位天敌是八斑球腹蛛Theridion ocomaculatum Bose.et Str(0.8207)和斜纹猫蛛(0.8104),与茶蚜空间上跟随关系密切的前二位天敌是八斑球腹蛛(0.8324)和斜纹猫蛛(0.7730)。其中,11月25日4种茶园假眼小绿叶蝉和茶蚜数量均较多。分析了该日另外二个茶树品种福云六号和龙井长叶茶园假眼小绿叶蝉和茶蚜与其天敌的空间关系,结果表明,二种茶园假眼小绿叶蝉和茶蚜及其天敌均为聚集分布,福云六号茶园与假眼小绿叶蝉变程值(3.8182)最接近的天敌是斜纹猫蛛(4.7222),与茶蚜变程值(6.5854)最接近的天敌是斜纹猫蛛(4.7222);龙井长叶茶园与假眼小绿叶蝉变程值(1.0000)最接近的天敌是八斑球腹蛛(1.0000),与茶蚜变程值(4.5000)最接近的天敌是斜纹猫蛛(7.6316)。总之,秋冬季4个品种茶园斜纹猫蛛在空间上是假眼小绿叶蝉和茶蚜跟随关系最密切的天敌,其次是八斑球腹蛛和草间小黑蛛。

Spatial relationships among Empoasca vitis (Gothe) and Toxoptera aurantii (Boyer) and natural enemies in tea gardens of autumn-winter season in Hefei suburban

To protect and utilize reasonably nature enemies, and provide scientifically sampling methods, in the this study, spatial relationships of natural enemies with Empoasca vitis (Gothe) and Toxoptera aurantii (Boyer) from late September to late November in 2010, respectively, were investigated in the four kinds of tea gardens of different cultivars (i.e. "Shu" tea, "Ping yang te zao" tea, "Fu yun-six" tea and "Long jing chang ye" tea) in Hefei suburban district, China. The ranges of spatial dependence (RSDs) of natural enemies and Empoasca vitis (Gothe) as well as Toxoptera aurantii (Boyer) were, respectively, calculated by the method of geostatistics, and the spatial relationships among enemies and pests were analyzed using grey relational analysis. The results showed that Empoasca vitis (Gothe), Toxoptera aurantii (Boyer) and four kinds of natural enemies (i.e. Misumenops tricuspidatus Fabr., Theridion ocomaculatum Bose. et Str., Oxyopes sertatus L. Koch and Erigonidium graminicolum Sundevall), respectively, displayed aggregative distribution pattern in the four kinds of tea gardens. The relational grade analysis showed that the two main enemies of Oxyopes sertatus L. Koch and Erigonidium graminicolum Sundevall, respectively, have consanguineous relation with Empoasca vitis (Gothe) and Toxoptera aurantii (Boyer) in spatial following relationships in the "Shu" tea garden. Whereas Theridion ocomaculatum Bose. et Str. and Oxyopes sertatus L. Koch, respectively, have very tight connection with Empoasca vitis (Gothe) and Toxoptera aurantii (Boyer) in spatial following relationships in the "Ping yang te zao" tea garden. Specially, in the all four kinds of tea gardens, the most amount of Empoasca vitis Gothe and Toxoptera aurantii Boyer appeared on November 25, 2010, and the two kinds of insect pests and the four kinds of natural enemies, respectively, displayed aggregative distribution pattern in the "Fu yun-six" and "Long jing chang ye" tea gardens. Whilst the results showed that the main enemy of Empoasca vitis Gothe was Oxyopes sertatus L. Koch in "Fu yun-six" tea field, and Theridion ocomaculatum Bose. et Str. in "Long jing chang ye" tea field. While the main enemy of Toxoptera aurantii Boyer was Oxyopes sertatus L. Koch in the two kinds of tea fields. Moreover, our findings indicated that the RSDs of Oxyopes sertatus L. Koch in the two kinds of tea fields were 4.7222 and 7.6316, respectively. In conclusion, the present results revealed that the most main enemy of Empoasca vitis Gothe and Toxoptera aurantii was Oxyopes sertatus L. Koch Boyer in spatial following relationships in the four kinds of tea gardens in autumn-winter season, and then was Theridion ocomaculatum Bose. et Str. and Erigonidium graminicolum Sundevall.