| 杨瑞生1,2;秦利1;姜义仁1;于威3;高德三1.桑园中野蚕幼虫空间分布格局的研究[J].植物保护,2007,33(6):99-102. |
| 桑园中野蚕幼虫空间分布格局的研究 |
| Studies on spatial patterns of wild mulberry silkworm larvae in mulberry fields |
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| DOI： |
| 中文关键词: 野蚕 空间分布格局 卡方检验 聚集指标 |
| 英文关键词:wild mulberry silkworm spatial distribution pattern χ2 test aggregation indices |
| 基金项目: |
| 杨瑞生1 2;秦利1;姜义仁1;于威3;高德三1 |
| 1.沈阳农业大学生物科技学院 沈阳 110161;3.浙江理工大学生命科学学院 杭州 310027;2.中国农业科学院植物保护研究所,植物病虫害生物学国家重点实验室 北京100094 |
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| 中文摘要: |
| 经卡方检验和5种聚集指标测定,野蚕幼虫在桑园的水平分布属于聚集分布中的负二项分布,即在桑园中的分布特点表现为极不均匀的嵌纹分布。聚集原因是由野蚕幼虫的行为和环境因素引起的。种群中个体在发生概率上不相同,样方内一个个体的存在,增加了同样方内其他个体发生的概率。低龄(1、2龄)幼虫主要分布在桑树枝条的中上部,高龄(3、4龄)幼虫主要分布在桑树枝条的中下部。 |
| 英文摘要: |
| Both χ2 test and aggregation indices were used in this study.The results indicated that the spatial distribution pattern of wild mulberry silkworm Theophila mandarina Moore larvae in mulberry fields was of aggregated distribution(i.e.negative binomial distribution or mosaic distribution).The aggregation may be caused by the behavior of Theophila mandarina larvae amd environmental conditions.The ontogenesis in its population was different in probability.The ontogenesis of an individual in a sample plot raised the occurrence probability of other individuals in the same plot.The 1st and 2nd instar larvae were mainly distributed on the upper parts of the stems,while the 3rd and 4th instars on the lower parts of the mulberry stems. |
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