Tumours of Begonia and some other ornamentals, induced by Corynebacterium fascians H. A. Van HoofH. HuttingaD. G. J. De Raay-Wieringa OriginalPaper Pages: 87 - 98
Yellows of lettuce and some other vegetable crops in the Netherlands caused by beet western yellows virus J. W. AshbyL. BosN. Huijberts OriginalPaper Pages: 99 - 111
Purification and some properties of pea leafroll virus J. W. AshbyH. Huttinga OriginalPaper Pages: 113 - 123
Parsley latent virus, a new and prevalent seed-transmitted, but possibly harmless virus of Petroselinum crispum L. BosH. HuttingaD. Z. Maat OriginalPaper Pages: 125 - 136
Decreased sensitivity to pyrazophos of cucumber and gherkin powdery mildew J. DekkerA. J. Gielink OriginalPaper Pages: 137 - 142
A method to test wheat leaves for their reactions to inoculation with Septoria species E. Ubels OriginalPaper Pages: 143 - 150