Studies on the sterile male technique as a means of control of Adoxophyes orana (Lepidopt., Tortricidae). 3. An evaluation of competitiveness of laboratory-reared moths D. L. DenlingerG. W. AnkersmitJ. Ph. W. Noordink OriginalPaper Pages: 229 - 235
Light and electron microscopy of Vinca plants infected with mycoplasma-like bodies of the sandal spike disease C. HirukiJeanne Dijkstra Erratum Pages: 235 - 235
Morphology and cytology of the promycelium and the basidiospore of Puccinia horiana R. G. KapooriaJ. C. Zadoks OriginalPaper Pages: 236 - 242
Some factors influencing the outgrowth of Botrytis tulipae from lesions on tulip bulbs after planting Amelita W. DoornikB. H. H. Bergman OriginalPaper Pages: 243 - 248
Reconsideration of the distinction between the severe and yellow strains of cowpea mosaic virus Hannemarie SwaansA. van Kammen OriginalPaper Pages: 257 - 265
Umweltschutz in Land- und Forstwirtschaft. No 1. Naturhaushalt. No 2. Pflanzliche Produktion. No 3. Tierische Produktion W. Gams Book Review Pages: 276 - 276
The occurrence of Phytophthora citricola Sawada sensu Waterhouse (syn. P. cactorum (Leb. et Cohn) Schroet. var. applanata Chest.) in ornamentals in the Netherlands H. RattinkN. A. M. van Steekelenburg Short Communication Pages: 277 - 278
Ammonia, a fungistatic volatile in chitin-amended soil B. SchippersL. C. Palm Short Communication Pages: 279 - 281
Extraction, purification and identification of 3-indoleacetic acid (IAA) from culture filtrates of Pythium sylvaticum A. C. Posthumus Short Communication Pages: 282 - 284