NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Investigations of remote sensing techniques for early detection of Dutch elm diseaseSeveral forms of aerial photography were pursued in quest of a technique which could provide early detection of Dutch elm disease. The two most promising techniques tested were multispectral photography with object enhancement and biband ratioing coupled with scanning microdensitometry. For practical purposes the multispectral system has the advantage of providing a readily interpretable image in a relatively short time. Laboratory studies indicated that less emphasis should be placed on the use of a red filter or the near infrared beyond 750 mm for early detection of stress within a single plant species. Color infrared film would be optimal when used for a long term detection of loss of plant vigor which results in a physical change in a plant canopy, but should find minimal practicality for early detection of specific sources of plant stress such as Dutch elm disease. Considerable discretion should be used when interpreting imagery on copy film because of loss of resolution and color definition.
Document ID
19760045108
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hammerschlag, R. S.
(U.S. Department of the Interior, National Park Service, Washington D.C., United States)
Sopstyle, W. J.
(NASA Wallops Flight Center Wallops Island, Va., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: Remote sensing of earth resources. Volume 4
Location: Tullahoma, TN
Start Date: March 24, 1975
End Date: March 26, 1975
Accession Number
76A28074
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available