2012年北京各区县不同寄主上二斑叶螨发生调查

Investigation of Occurrence of Tetranychus urticae Koch in Different Areas of Beijing in 2012

对北京市不同地区及不同寄主上二斑叶螨的种群密度和危害等级进行了比较。结果表明:相同寄主不同地区二斑叶螨种群密度和危害等级各不相同。海淀区辣椒棚该螨种群密度和危害等级显著大于延庆县,昌平区草莓上该螨种群密度和危害等级显著大于房山区,在通州区和密云县的种群密度和危害情况差异不显著。比较二斑叶螨在北京5种常见温室寄主上种群密度,发现其差异显著等级划分为:辣椒>草莓>番茄、茄子和人参果。该螨对寄主叶片危害等级与其种群密度不一致,其显著差异等级划分为:人参果、辣椒、番茄、草莓>茄子。

The population densities and the damage level of Tetranychus urticae Koch in different areas and host plants were studied.The results showed that population densities of this mite and the level of its damage on the same host in different areas were different.Population densities and the damage level of this mite on the chilli pepper at Haidian district were significantly higher than that at Yanqing county.The same data on the strawberry at Changping district were significantly higher than that at Fangshan district.However the differences of same data at Tongzhou district and Miyun county were not significant.After compared the population densities of this mite on 5 different host plants,it found that its significant difference could be divided to 3 levels：chilli pepperstrawberry（tomato,eggplant and ginseng fruit）.However the damage level of the mite was not consistent with population densities of the mite and its significant difference could be divided to 2 levels：（ginseng fruit,chilli pepper,tomato and strawberry）eggplant.