The combined disciplines of entomology, plant pathology, and plant breeding, aimed at jointly and cooperatively reducing crop losses resulting from both parasites and weeds. Modern crop protection depends very heavily on crop protection chemicals, and the chief aim of amateur plant breeders is to reduce this dependence on chemicals by breeding crops for horizontal resistance. Crop protection chemicals
In the wide sense, this term means any chemical used to control crop parasites or weeds. The former are mainly insecticides and fungicides, while the latter are herbicides. In any discussion of crop parasites, however, the term is usually used to exclude herbicides.
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