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稻田蜘蛛是稻飞虱及稻纵卷叶螟的重要捕食性天敌。在我省遵义县城附近的稻田中,以草间小黑蛛(占总稻田蜘蛛的50～60％),黄褐新圆蛛(占30～40％)和蟏蛸(占10～15％)为优势种群。它们对稻飞虱的捕食量大,控制力强,是当地稻田的重要天敌。为了更好地揭示稻田蜘蛛的生物学及生态学特性,为种群消长分析,科学的抽样以及田间防治效果的分析提供理论依据。据此,我们对稻田蜘蛛混合种群的空间分布型及抽样技术进行了研究,现将结果报道如下:
Paddy spiders are major predators for planthoppers and rice leafrollers. Among the paddy fields near Zunyi County in our province, young black spider (50-60% of the total rice field spiders), New spider mite (30-40%) and scorpion (10-15% For the dominant population. Their predation on planthoppers large, strong control, is an important natural enemy of rice fields. In order to better reveal the biological and ecological characteristics of rice spiders, it provides a theoretical basis for population decline analysis, scientific sampling and analysis of field control effects. Based on this, we studied the spatial distribution patterns and sampling techniques of mixed populations of spider mits in paddy fields. The results are reported as follows: