Professor Dr A. J. P. Oort, his research work and scientific interests L. C. P. KerlingJ. G. Ten Houten Announcement Pages: 9 - 18
The TNO research unit for internal therapy of plant diseases G. J. M. Van Der Kerk BriefCommunication Pages: 19 - 21
Geschiedenis en ontwikkeling van het Laboratorium voor Fytopathologie A. Rozendaal OriginalPaper Pages: 27 - 34
Lactarius mairei and its occurrence in The Netherlands A. F. M. Reijnders OriginalPaper Pages: 35 - 39
Influence of repeated applications of nematicides on the soil fauna in begonia culture J. van den BrandeA. Heungens OriginalPaper Pages: 40 - 44
Pathogenic races, host resistance, and an analysis of pathogenicity J. E. van der Plank OriginalPaper Pages: 45 - 52
Responses to air flow and airborne plant odour in the Colorado beetle J. De WildeK. Hille Ris Lambers-SuverkroppA. Van Tol OriginalPaper Pages: 53 - 57
Correlation of phenolic metabolism with histological changes in Phaseolus vulgaris inoculated with fungi J. E. RaheJ. KućE. B. Williams OriginalPaper Pages: 58 - 71
The isolation and properties of a fungicidal compound present in seedlings of Vicia faba C. H. FawcettD. M. SpencerR. L. Wain OriginalPaper Pages: 72 - 81
Increase in phenylalanine ammonia-lyase activity in bean leaves infected with tobacco necrosis virus G. L. FarkasJ. Szirmai OriginalPaper Pages: 82 - 85
Syntheseaktivität und Grösse der Zellkerne von Phaseolus vulgaris nach Infektion mit Uromyces phaseoli typica W. H. FuchsJ. Tschen OriginalPaper Pages: 86 - 95
Uncommon disease symptoms caused by Fusarium oxysporum in tulips forced in the glasshouse after pre-cooling at 5°C P. K. SchenkB. H. H. Bergman OriginalPaper Pages: 100 - 104
On the capacity of Bacillus thuringiensis to spread in insect populations P. A. van der LaanH. J. M. Wassink OriginalPaper Pages: 105 - 108
A technique for interpretation of high resolution electron micrographs G. A. De Zoeten OriginalPaper Pages: 109 - 112
Difolatan, a promising fungicide for control of the tapping panel disease Black Thread in Hevea brasiliensis J. Schreurs OriginalPaper Pages: 113 - 118
Volatile fungitoxicants from chemicals containing haloalkylthio groups A. Tempel OriginalPaper Pages: 119 - 122
A new disease in tulip caused by Corynebacterium oortii nov. spec. G. J. SaaltinkH. P. Maas Geesteranus OriginalPaper Pages: 123 - 128
Failure of methoxyethylmercuric silicate plus malathion or lindane to control common bunt of wheat J. Kuiper OriginalPaper Pages: 129 - 132
Incidence of Phytophthora pod rot disease of cacao at different heights in the tree G. Weststeijn OriginalPaper Pages: 133 - 136
Inclusion bodies of bean yellow mosaic virus, some less known closely related viruses and beet mosaic virus L. Bos OriginalPaper Pages: 137 - 143
Resistance of rose rootstocks to crown gall (Agrobacterium tumefaciens) B. H. Boelema OriginalPaper Pages: 147 - 150
Effect of chemotherapeutically active amino acids on pathogenicity and growth of a wild type strain and a nutritional mutant of Cladosporium cucumerinum Ell. et Arth. O. M. van Andel OriginalPaper Pages: 151 - 156
The selective effect of heat treatment on the microflora of a greenhouse soil G. J. Bollen OriginalPaper Pages: 157 - 163
The role of pisatin in the resistance of pea plants—some further experiments on the breakdown of pisatin Annemarie De Wit-Elshove OriginalPaper Pages: 164 - 168
The ultrastructure of powdery mildew, Sphaerotheca fuliginea, isolated from cucumber leaves H. M. DekhuijzenChristina Van der Scheer OriginalPaper Pages: 169 - 177
The pathogenicity of several Pythium species to rootlets of apple seedlings D. Mulder OriginalPaper Pages: 178 - 181
L-methionine induced inhibition of powdery mildew and its reversal by folic acid J. Dekker OriginalPaper Pages: 182 - 185
Metabolism of radioactively labeled quinic acid and shikimic acid in healthy and Fusarium-infected tomato plants A. FuchsF. W. de Vries OriginalPaper Pages: 186 - 192
The effect of derivatives of 1,4-oxathiin on Puccinia horiana in chrysanthemum morifolium J. C. ZadoksA. KoddeW. Hoogkamer OriginalPaper Pages: 193 - 196
