Plant pathology (also phytopathology) is the scientific study of diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors).
First used in western medicine in the 17th century what was the drug developed from the bark of the cinchona tree used to treat?
Which of these is a tree disease spread by beetles?
A. German Oak Disease
B. Dutch Elm Disease
C. Belgian Ash Disease
D. Australian Willow Disease
Which of these diseases is caused by bacteria, not viruses ?
Which of these diseases is cased by a protozoan parasite?