References
- Bolton , A. T. and Svejda , F. J. 1979 . A new race of Diplocarpon rosae capable of causing severe blackspot on Rosa rugosa hybrids . Can. Plant Dis. Surv. , 59 : 38 – 43 .
- Palmer , J. G. , Semeniuk , P. and Stewart , R. N. 1966 . Roses and blackspot. I. Pathogenicity to excised leaflets of Diplocarpon rosae from seven geographic locations . Phytopathology , 56 : 1277 – 1282 .
- Semeniuk , P. and Arisumi , T. 1968 . Colchicine-induced tetraploid and cytochimeral roses . Bot. Gaz. , 129 : 190 – 193 .
- Togliani , F. 1971 . La resistenza della rosa alla ticchiolatura e all' oidio . Ital. Agric. , 108 : 83 – 92 .
- Zhalnina , L. S. and Nazarenko , L. G. 1973 . Initial material for breeding disease-resistant roses . Tr. VNII Efirnomaslich. Kultur , 6 : 36 – 37 . Abstr. in Pl. Breed. Abstr. 46:8261