| 摘要: |
| 马尾松毛虫越冬幼虫空间分布型是属负二项分布,其分布基本成分是疏松的个体群。采用Iwao法测定聚集度和资料代换为佳,越冬期虫情调查以对角线法抽样精度较高,并可通过调查树干0～2米或树冠第一轮虫口,建立回归式推算全树虫口密度。 |
| 关键词: 马尾松毛虫,分布型,抽样 |
| DOI： |
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| 基金项目: |
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| SPATIAL DISTRIBUTION AND SAMPLING TECHNIQUES OF THE OVERWINTERING MASSON''''S PINE CATERPILLAR LARVAE |
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| Abstract: |
| The spatial distribution pattern of the overwintering larvae of the Masson's pine caterpillar is a negative binomial one and Iwao's test is the best for the aggregation analysis and datum transformation. In diagonal sampling, which gives comparably higher precision, larval numbers at o-2m in height of trunks and on the first whirl from the ground are counted to set regression equation for the estimate of larval number all over a tree. |
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