Visual aids for aerial observers on forest insect surveys.

A.T. Larsen

Treesearch

Visual aids for aerial observers on forest insect surveys.

Informally Refereed

Authors:

A.T. Larsen

Year:

1957

Type:

Research Note

Station:

Pacific Northwest Research Station

Source:

PNW Old Series Research Notes No. 149, p. 1-4

Download (PDF 276 KB)

Download (PDF 276 KB): https://research.fs.usda.gov/download/treesearch/25797.pdf

Abstract

Aerial surveys are widely used to detect, appraise, and map damage caused to forest trees by insects. The success of these surveys largely depends upon the ability of observers to distinguish differences in foliage color and tree condition. The observers' ability is influenced by several factors.

Citation

Larsen, A.T. 1957. Visual aids for aerial observers on forest insect surveys. PNW Old Series Research Notes No. 149, p. 1-4