Seasonal changes in primary and secondary inoculum during epidemics of leaf blotch (Rhynchosporium secalis) on winter barley

A - Papers appearing in refereed journals

Davis, H. and Fitt, B. D. L. 1992. Seasonal changes in primary and secondary inoculum during epidemics of leaf blotch (Rhynchosporium secalis) on winter barley. Annals of Applied Biology. 121 (1), pp. 39-49.

AuthorsDavis, H. and Fitt, B. D. L.
Abstract

Seasonal changes in numbers of conidia of Rhynchosporium secalis on debris from previous barley crops infected with leaf blotch (primary inoculum) were monitored in 1985-86 and 1986-87. In 1986-87, changes in numbers of conidia on leaves of plants in the new winter barley crop (secondary inoculum) were also recorded. The greatest increases in production of primary inoculum were in early spring after rain, when temperatures were increasing after periods of sub-zero temperatures when there was little conidial production. Subsequently, more conidia were recovered from this debris after cycles of drying and rewetting than when it remained wet. After January 1987, amounts of secondary inoculum produced on the crop were much greater than amounts of primary inoculum on debris. Most spores were produced on the basal leaves and more spores were present on the September-sown than on the November-sown crop. Thus, while primary inoculum was a source of disease when plants were emerging, secondary inoculum on basal leaves was the main source of disease at stem extension, especially on early-sown crops.

KeywordsAgriculture, Multidisciplinary
Year of Publication1992
JournalAnnals of Applied Biology
Journal citation121 (1), pp. 39-49
Digital Object Identifier (DOI)doi:10.1111/j.1744-7348.1992.tb03985.x
Open accessPublished as non-open access
Copyright licensePublisher copyright
ISSN00034746
PublisherWiley

Permalink - https://repository.rothamsted.ac.uk/item/8w86w/seasonal-changes-in-primary-and-secondary-inoculum-during-epidemics-of-leaf-blotch-rhynchosporium-secalis-on-winter-barley

Total views: 0

Total downloads: 0

Views this month: 0

Downloads this month: 0