The incubation period of beet yellowing viruses in sugar-beet under field conditions W. Van Der WerfC. KempenaarD. Peters OriginalPaper Pages: 241 - 258
Aphanomyces euteiches as a component of the complex of foot and root pathogens of peas in Dutch soils Pedro OyarzunJoop van Loon Short Communication Pages: 259 - 264
Modelling short-term effects of sulphur dioxide. 3. Effects of SO2 on photosynthesis of leaf canopies M. J. KropffJ. Goudriaan OriginalPaper Pages: 265 - 280
Pseudomonas for biological control of dutch elm disease. I. Labeling, detection and identification of pseudomonas isolates injected into elms; comparison of various methods R. J. SchefferD. M. ElgersmaG. A. Strobel OriginalPaper Pages: 281 - 292
Pseudomonas for biological control of dutch elm disease R. J. SchefferD. M. ElgersmaG. A. Strobel OriginalPaper Pages: 293 - 304