Monitoring western spruce budworm with pheromone- baited sticky traps to predict subsequent defoliation

Christine G. Niwa; David L. Overhulser

doi:10.2737/PNW-RN-571

Treesearch

Monitoring western spruce budworm with pheromone- baited sticky traps to predict subsequent defoliation

Informally Refereed

Authors:

Christine G. Niwa, David L. Overhulser

Year:

2015

Type:

Research Note

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RN-571

Source:

Research Note. PNW-RN-571. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research. 12 p.

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Download (PDF 2.18 MB): https://research.fs.usda.gov/download/treesearch/48631.pdf

Abstract

A detailed procedure is described for monitoring western spruce budworm with pheromone-baited sticky traps and interpreting the results to predict defoliation the following year. Information provided includes timing of the survey, how to obtain traps and baits, how many traps are needed, trap assembly, field placement of traps, and how to evaluate the catches.

Citation

Niwa, Christine G.; Overhulser, David L. 2015. Monitoring western spruce budworm with pheromone- baited sticky traps to predict subsequent defoliation. Res. Note. PNW-RN-571. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research. 12 p.