• Publications
  • Influence
Influence of crop growth and structure on the risk of epidemics by Mycosphaerella graminicola (Septoria tritici) in winter wheat
Generally, it is recognized that inocula of Septoria tritici present on the basal leaves of winter wheat crops are spread towards the top of the canopy by splashy rainfall. This mechanism of inoculumExpand
Multiple Regression Analysis in the Epidemiology of Plant Diseases
During the progress in time of an epidemic, cycles of events occur repeatedly in which inoculum is produced, dispersed and intercepted, and some of the surviving propagules infect; as a consequenceExpand
The reliability of visual estimates of disease severity on cereal leaves
Visual estimates of wheat disease severity were compared with actual severities determined using image analysis of tracings of diseased leaves. Septoria tritici, leaf senescence and Erysiphe graminisExpand
Quantitative relationships between infection by the hop downy mildew pathogen, Pseudoperonospora hutnuli, and weather and inoculum factors
SUMMARY Experiments are described in which successive groups of healthy, susceptible, potted hop-plants were exposed, each 24 h, to the weather and to sources of Pseudoperonospora kumuli inoculumExpand
Airborne inoculum as a major source of Septoria tritici (Mycosphaerella graminicola) infections in winter wheat crops in the UK
The pattern and extent of primary infection by Septoria tritici were compared over a period of 3 years in winter wheat grown at sites with differing histories and from seed stocks obtained inExpand
Reliable measurement of disease severity
Identity and host alternation of some willow rusts (Melampsora spp.) in England
Six species of Melampsora: M. salicis-albae, M. larici-pentandrae, M. amygdalinae, M. capraearum, M. ribesii-viminalis and M. epitea , were identified among 26 willow leaf samples collected mainly inExpand
Factors determining the severity of epidemics of Mycosphaerella graminicola (Septoria tritici) on winter wheat in the UK
Epidemics of disease caused by Septoria tritici were studied in detail in 11 crops of winter wheat cv. Longbow over 4 years. Serious damage to the uppermost two leaf layers was caused by splash-borneExpand
Pathogenic specialization in Melampsora epitea var. epitea on Salix
Eighteen isolates of the rust fungus Melampsora from different locations in England were tested for pathogenicity to a large range of willow clones (Salix spp.) in experiments involving inoculationExpand