REMOTE-SENSING AND IMAGE-ANALYSIS IN PLANT PATHOLOGY

Remote sensing of vegetation and plants under stress comprises various nondestructive methods of spectral analysis from distances ranging fr om satellites to ground-based platforms. By using multispectral images we can continue down to the macroscopic? microscopic and ultramicrosc opic levels in nondestructive analyses of plants, plant diseases and p athogens. Techniques and methods of multispectral radiometry, photogra phy, videography, IR thermography, multispectral image analysis, and N MR are reviewed in this paper with examples of applications in phytopa thology and phytopathometry. Although we cannot yet identify specific diseases or stresses by remote sensing, we are able to detect and quan tify their intensity. This usually facilitates, rationalizes, and incr eases the accuracy of research in phytopathology, and makes the resear ch more interesting acid valuable.