The use of spectral information for the discrimination of crops and weeds is reviewed,
discussing research results covering most of this century. This includes discussions about …

A number of studies have linked responses in leaf spectral reflectance, transmittance, or
absorptance to physiological stress. A variety of stressors including dehydration, flooding …

Ratios of leaf reflectances that were measured within narrow wavebands (2nm) were
evaluated as indicators of plant stress. Wavebands used in ratio computation were based on …

Leaf spectral reflectances were measured to determine whether leaf reflectance responses
to plant stress may differ according to the agent of stress and species. As a result of …

Excessive use of pesticides for plant disease treatment increases costs and raises the
danger of toxic residue levels on agricultural products. As pesticides are among the highest …

Plant leaves collectively represent the largest above-ground surface area of plant material in
virtually all environments. Their optical properties determine where and how energy and gas …

Digital images of soybean canopies [Glycine max (L.) Merrill] were obtained within selected
narrow wavebands (6–10 nm bandwidths) to determine their capability for early detection of …

The objective of this research was to develop a ground-based real-time remote sensing
system for detecting diseases in arable crops under field conditions and in an early stage of …

Abstract Analysis of reflectance can be used to estimate foliar concentrations of
photosynthetic pigments, thus providing information on the physiological status of green …

Rice reflectance was measured to determine the spectral regions most sensitive to panicle
blast infection. Reflectance increased in the 430-to 530-, 580-to 680-, and 1,480-to 2,000 …