Comparison of the epidemiology of Metopolophium dirhodum and Sitobion avenae on winter wheat G. W. AnkersmitN. Carter OriginalPaper Pages: 71 - 81
Characteristics and pathogenicity of six Phytophthora isolates from pot plants H. Rattink OriginalPaper Pages: 83 - 90
Maladies à virus et affections similaires de la vigne; atlas en couleurs des symptomes L. Bos Book Review Pages: 90 - 90
Hundred years of Koch's Postulates and the history of etiology in plant virus research L. Bos OriginalPaper Pages: 91 - 110
Flight behaviour of the aphidMyzus persicae during its maiden flight P. HarrewijnH. A. Van HoofJ. P. W. Noordink OriginalPaper Pages: 111 - 117