Agriculture Reference
In-Depth Information
(Daley, 1995) and evapotranspiration, and increased leaf surface temperature. Other
symptoms may include leaf curling, wilting, stunting, chlorosis and necrosis of plant
parts. Remote sensing provides a method for detecting and assessing such changes.
However, it is likely that remote sensing will remain an indirect method of assessing
plant disease through the interpretation of deviations from the norm, such as leaf
temperature, rather than directly measuring reductions in leaf area due to disease.
Figure 2.9. Video image analysis system for measuring diseased or damaged plant tissue
(Lindow and Wenn, 1983).
