Abstract:
:Key weather factors determining the occurrence and severity of powdery mildew and yellow rust epidemics on winter wheat were identified. Empirical models were formulated to qualitatively predict a damaging epidemic (>5% severity) and quantitatively predict the disease severity given a damaging epidemic occurred. The disease data used was from field experiments at 12 locations in the UK covering the period from 1994 to 2002 with matching data from weather stations within a 5 km range. Wind in December to February was the most influential factor for a damaging epidemic of powdery mildew. Disease severity was best identified by a model with temperature, humidity, and rain in April to June. For yellow rust, the temperature in February to June was the most influential factor for a damaging epidemic as well as for disease severity. The qualitative models identified favorable circumstances for damaging epidemics, but damaging epidemics did not always occur in such circumstances, probably due to other factors such as the availability of initial inoculum and cultivar resistance.
journal_name
Phytopathologyjournal_title
Phytopathologyauthors
Te Beest DE,Paveley ND,Shaw MW,van den Bosch Fdoi
10.1094/PHYTO-98-5-0609subject
Has Abstractpub_date
2008-05-01 00:00:00pages
609-17issue
5eissn
0031-949Xissn
1943-7684journal_volume
98pub_type
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