The isolation of haustoria from cucumber leaves infected with powdery mildew H. M. Dekhuijzen Articles Pages: 1 - 11
On the dangers of artificial infection with yellow rust to the barley crop of the netherlands; A quantitative approach J. C. Zadoks Articles Pages: 12 - 19
Een Bladvlekkenziekte OpAllium-Soorten, Veroorzaakt DoorBotrytis Squamosa G. M. Tichelaar Short Communication Pages: 31 - 32