烟田异色瓢虫幼虫空间分布型及抽样技术
The spatial distribution pattern and sampling method of the larvae of Leis axyridis in tobacco fields.
任广伟1;申万鹏2;马剑光2
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DOI：10.7679/j.issn.2095-1353.2000.038
作者单位：1.中国农科院烟草研究所,山东青州262500;2.贵州驰宇集团烟科所,毕节551700;
中文关键词：烟田;异色瓢虫;幼虫;分布型;抽样技术
英文关键词：tobacco fields;Leis axyridis;larva;spatial distribution;sampling method
中文摘要：异色瓢虫幼虫在烟田的空间分布型为聚集分布 ,并符合负二项分布。聚集原因由环境差异引起。通过 Taylor指数回归式参数确定了在一定精确度水平下的理论抽样数。
英文摘要：The spatial distribution pattern of the larvae of Leis axyridis (Pallas) was of the aggregate pattern and fitted with the negative binomial distribution.The aggregation was caused by the enviromental factors.The sample size requirements at fixed pr