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Ground‐based remote‐sensing measurements for early detection of plant stresses
Author(s) -
BACCI L.,
BENINCASA F.,
MARACCHI G.,
ZIPOLI G.
Publication year - 1991
Publication title -
eppo bulletin
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.327
H-Index - 36
eISSN - 1365-2338
pISSN - 0250-8052
DOI - 10.1111/j.1365-2338.1991.tb01301.x
Subject(s) - remote sensing , multispectral image , environmental science , infrared , radiometer , canopy , materials science , geology , optics , ecology , biology , physics
Biotic and a biotic stresses are responsible for significant yield reduction and qualitative depreciation of agricultural products. In planning plant protection, one of the first elements needed is early and accurate detection of the presence and extent of damage. Remote sensing is a viable technique for such detection, since biotic and a biotic agents modify the electromagnetic characteristics of leaf and canopy surfaces. Damage can be detected at an appropriate wavelength, according to the nature of the anatomical or physiological alteration produced. The objective of this paper is to outline the potentialities of remote‐sensing techniques in this field. At the leaf scale, laboratory devices were able to register leaf tissue alterations before they were visually detectable, by measuring spectral reflectance in the 0.4‐1.1 μm interval and emittance in the thermal infrared band. At field scale, whole canopy modifications can be successfully detected by means of multispectral radiometers (in the visible and near‐infrared bands) or using thermal infrared sensors.