References
- Borno , C. and van der Kamp , B. J. 1975 . Timing of infection and development of Gymnosporangium fuscum on Juniperus . Can. J. Bot. , 53 : 1266 – 1269 .
- Gregory , P. H. 1973 . The microbiology of the atmosphere. , 2nd ed. , 377 Leonard Hill Ltd. London .
- Hunt , R. S. and O'Reilly , H. J. 1978 . Overwintering of pear trellis rust in pear . Plant Dis. Rep. , 62 : 659 – 660 .
- McCain , A. J. and Rosenberg , D. Y. 1961 . Pear-juniper rust, a disease new to California and the United States. Calif . Dep. Agric. Bull. , 50 : 13 – 19 .
- Mitrofanova , O. V. 1970 . Pear rust and its control . Simferopol, Izdat. ‘Krym’. , : 47
- Parmelee , J. A. 1971 . The genus Gymnosporangium in Western Canada . Can. J. Bot. , 49 : 903 – 926 .
- Ziller , W. G. 1961 . Pear rust (Gymnosporangium fuscum) in North America . Plant Dis. Rep. , 45 : 90 – 94 .
- Ziller , W. G. 1974 . The tree rusts of Western Canada. , Can. Forest Serv. Publ. 1329 272