Davidson, Roy M., 1939-; Byther, Ralph S.(Pullman, Washington : Washington State University. Extension., 1994-07)
Parasitic diseases caused by fungi, bacteria, viruses, or nematodes are responsible for only about one-third of all plant problems. The rest are caused by such factors as climate, planting location or procedures, and ...
Byther, Ralph S.; Davidson, Roy M., 1939-(Pullman, Washington : Washington State University. Extension., 1995-09)
This disease is caused by the fungi Taphrina populi-salicis and T. populina. Lombardy poplars are frequently affected, showing leaf blisters and having leaves a bright yellow or orange due to the fungi spores. Control is ...
Shanks, Carl H.; Crandall, Perry C.; Byther, Ralph S.; Antonelli, Arthur L.; Peabody, Dwight V.; Scheer, William P. A.(Pullman, Washington : Washington State University. Extension., 1980-04)
Shanks, Carl H.; Crandall, Perry C.; Byther, Ralph S.; Antonelli, Arthur L.; Peabody, Dwight V.; Scheer, William P. A.(Pullman, Washington : Washington State University. Extension., 1978-03)