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Sampling Western Spruce Budworm Larvae by Frequency of Occurrence on Lower Crown Branches

机译：下冠分枝发生频率对西方云杉夜蛾幼虫的取样

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A sampling method was derived whereby budworm density can be estimated by the frequency of occurrence of larvae over a given threshold number instead of by direct counts on branch samples. The model used for converting frequencies to mean densities is appropriate for nonrandom as well as random distributions and, therefore, is applicable to all population densities of budworm. The method is suggested as a possible alternative to the direct counting of larvae in lower crown sampling.

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作者
Mason, R. R.; Beckwith, R. C.;
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年度 1990
页码 p.1-13
总页数 13
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Larvae ; Graphs(Charts) ; Statistical analysis ; Regression analysis;

机译：幼虫;图表（图表）;统计分析;回归分析;

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专利

1. Simulated western spruce budworm defoliation reduces torching and crowning potential: a sensitivity analysis using a physics-based fire model [J] . Cohn Gregory M., Parsons Russell A., Heyerdahl Emily K., International Journal of Wildland Fire . 2014,第5期

机译：模拟的西方云杉bud虫脱叶减少了割炬和加冠的可能性：使用基于物理的火模型进行的敏感性分析
2. Timing of growth reductions in black spruce stem and branches during the 1970s spruce budworm outbreak. [J] . Krause C., Luszczynski B., Morin H., Canadian Journal of Forest Research . 2012,第7期

机译：1970年代云杉芽虫爆发期间黑云杉茎和枝生长减少的时机。
3. An endophytic fungus interacts with crown level and larval density to reduce the survival of eastern spruce budworm, Choristoneura fumiferana (Lepidoptera: Tortricidae), on white spruce (Picea glauca) [J] . Quiring Dan, Flaherty Leah, Adams Greg, Canadian Journal of Forest Research . 2019,第3期

机译：内生真菌与皇冠水平和幼虫密度相互作用，以减少东部云杉芽虫的生存，Chorytoneura fumiferana（鳞翅目：Tortricidae），在白色云杉（Picea glauca）上
4. Direct RF under sampling reception method with lower sampling frequency [C] . Banda Daliso, Wada Osamu, Ta Tuan Thanh, Asia-Pacific Microwave Conference . 2013

机译：采样频率较低的采样接收方式下的直接射频
5. Enhanced vertical fuel continuity in forests defoliated by spruce budworm (Choristoneura fumiferana Clem.) promotes the transition of a surface fire into a crown fire [D] . Watt, Graham Alexander. 2014

机译：由云杉芽虫（Choristoneura fumiferana Clem。）落叶的森林中增强的垂直燃料连续性促进了表面火向冠火的转变
6. Western Spruce Budworm Outbreaks Did Not Increase Fire Risk over the Last Three Centuries: A Dendrochronological Analysis of Inter-Disturbance Synergism [O] . Aquila Flower, Daniel G. Gavin, Emily K. Heyerdahl, -1

机译：西方云杉芽虫的爆发并没有增加过去三个世纪的火灾风险：干扰间协同作用的年代学分析
7. Relationships between spruce budworm damage and site factors in spruce-fir-dominated ecosystems of Western Upper Michigan [O] . David M. Hix, Burton V. Barnes, Ann M. Lynch, 1987

机译：云杉芽虫损伤与西部云杉的云杉统治生态系统之间的关系
8. Sampling Western Spruce Budworm by Counting Larvae on Lower Crown Branches [R] . Mason, R. R., Wickman, B. E., Paul, H. G. 1989

机译：通过计算下冠部分的幼虫来取样西部云杉芽虫

Sampling Western Spruce Budworm Larvae by Frequency of Occurrence on Lower Crown Branches

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