About the Book: Fundamentals of Plant Diseases
Plant diseases are generally divided into two groups based on their cause.
Nonparasitic diseases are induced by some genetic or environmental factor such
as nutrient deficiencies, extreme cold or heat, toxic chemicals (air pollutants,
weed killers, or too much fertilizer), mechanical injury, or lack of water.
These diseases cannot be transmitted to healthy plants and their control depends
solely on correcting the condition causing the disease. Plant diseases are
reasonably uniform in size and stability. They generally sediment between 50 and
500s and are resistant to chelating agents. Few host components share these
sedimentation and stability properties. Most plant diseases are