caa a22 4500 469042508 CHVBK 20180323132815.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF01974388 doi (NATIONALLICENCE)springer-10.1007/BF01974388 Surveys of cereal diseases and pests in the Netherlands. 4. Occurrence of powdery mildew and rusts in winter wheat [Elektronische Daten] [R. Daamen, R. Stubbs, W. Stol] Results of annual surveys of winter wheat fields from 1974 to 1986 were compiled to describe epidemics of powdery mildew and rusts in relation to weather and cultivar resistance. An average of 29 and 70% of fields were infected by powdery mildew in May and July, respectively. Mildew prevalence in May was positively correlated with average temperature in October and with average temperature over the months December, January, February and March. In addition, it was correlated negatively with the average grade of mildew resistance of the cultivars sown each year. Prevalence of mildew in July did not show consistent correlations with weather characteristics nor with mildew prevalence in May. Yellow rust was usually not detected in May and on average 18% of the fields was infected in July. The occurrence of yellow rust decreased after 1977, when the farmers adopted cultivars resistant or moderately resistant to yellow rust. Brown rust was usually not detected in May, while in July on average 48% of the fields was infected. Brown rust intensity in July was high in years with a high March temperature and high precipitation during April and May. Black rust was rare in the Netherlands, with 3 and 1% of the fields infected in July 1977 and 1981, respectively. Koninklijke Nederlandse Planteziektenkundige Vereniging, 1992 Triticum aestivum nationallicence Erysiphe graminis nationallicence Blumeria graminis nationallicence Puccinia striiformis nationallicence P. recondita nationallicence P. graminis nationallicence disease surveys nationallicence epidemiology nationallicence weather nationallicence resistance nationallicence Daamen R. Research Institute for Plant Protection (IPO-DLO), PO Box 9060, 6700 GW, Wageningen, the Netherlands aut Stubbs R. Research Institute for Plant Protection (IPO-DLO), PO Box 9060, 6700 GW, Wageningen, the Netherlands aut Stol W. Netherlands Grain Centre (NGC), Costerweg 5, 6702 AA, Wageningen aut Netherlands Journal of Plant Pathology Kluwer Academic Publishers 98/5(1992-09-01), 301-312 0028-2944 98:5<301 1992 98 10658 https://doi.org/10.1007/BF01974388 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01974388 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Daamen R. Research Institute for Plant Protection (IPO-DLO), PO Box 9060, 6700 GW, Wageningen, the Netherlands aut NATIONALLICENCE 700 1- Stubbs R. Research Institute for Plant Protection (IPO-DLO), PO Box 9060, 6700 GW, Wageningen, the Netherlands aut NATIONALLICENCE 700 1- Stol W. Netherlands Grain Centre (NGC), Costerweg 5, 6702 AA, Wageningen aut NATIONALLICENCE 773 0- Netherlands Journal of Plant Pathology Kluwer Academic Publishers 98/5(1992-09-01), 301-312 0028-2944 98:5<301 1992 98 10658 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 465659918 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer