摘要:
对冬季和夏季轻修剪前后当季茶园的主要节肢动物种群进行了调查。结果表明,冬季轻修剪能使节肢动物包括茶园蜘蛛、茶尺蠖幼虫、茶假眼小绿叶蝉、寄生蜂、茶卷叶蛾幼虫等的种群数量降低,如修剪后清理剪下的枝条,则以上节肢动物类群除寄生蜂外,下降率达显著或极显著水平。夏季轻修剪并清理枝条后茶假眼小绿叶蝉的虫口显著下降,轻修剪后清理或未清理枝条均使蜘蛛的虫口显著下降,而轻修剪后茶丽纹象甲则有所上升,如果轻修剪并清理枝条,则上升幅度更大,但未达显著水平;跳虫和节肢动物种群数量轻修剪后均上升,但没有达到显著水平,而如果轻修剪后清理枝条,跳虫和节肢动物总量则极显著下降。
Abstract:
In the winter,light pruning was found to reduce arthropods,which included spiders,larvae of Ectropis oblique hypulina Wehrli,Empoasca vitis Gothe,parasitoids and larvae of Homana coffearia Nietner,etc.All the abovementioned arthropods,except parasitoids,decreased in number significantly or very significantly when the cut tea branches were cleaned after pruning.In the summer,Empoasca vitis Gothe population decreased significantly after light pruning with clearing of the cut branches.Populations of spiders decreased significantly after light pruning even without clearing.On the other hand,the number of Myllocerinus aurolineatus Voss increased after light pruning.When the pruned branches were not cleared,the increase was obvious,but not significant.Populations of collembolans and arthropods both reached a higher,but not significant,level after light pruning.Their numbers decreased very significantly if the cut branches were removed.
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