Parameter Tree:
EARTH SCIENCE > AGRICULTURE > AGRICULTURAL PLANT SCIENCE > PLANT DISEASES/DISORDERS/PESTS

Definition:
Measurements related to any deviation from a normal state of health in
plants which temporarily or permanently impairs vital functions. It may
be caused by insect pests, viruses, pathogenic bacteria, parasites, poor
nutrition, congenital or inherent deficiencies, unfavorable environment,
or any combonation of these, and related pests. 


Reference:
Adapted from: Herren, R.V., and R.L. Donahue. 1991. The Agriculture
Dictionary, Delmar Publishers INC. Albany, New york. 553pp.