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Impact of temperature and precipitation on yield and plant diseases of winter wheat in southern Sweden 1983-2007

Wiik, Lars and Ewaldz, Torbjörn (2009). Impact of temperature and precipitation on yield and plant diseases of winter wheat in southern Sweden 1983-2007. Crop protection. 28:2009:1, 952-962
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Official URL: http://dx.doi.org/10.1016/j.cropro.2009.05.002

Abstract

Weather factors are driving forces in plant disease development and differ between years and locations. Results from long-term fungicide field trials 1983-2007 and disease surveys 1988-2007 in winter wheat in southern Sweden were used to evaluate relationships between yield, the yield increase obtained by fungicide treatment, thousand grain weight (TGW), disease severity and disease incidence, and the independent variables air temperature and precipitation as monthly means. These two weather variables explained more than 50% of the variation between years regarding yield increase, TGW, LBDs (Leaf Blotch Diseases, including Septoria tritici blotch, Stagonospora nodorum blotch and tan spot), brown rust, yellow rust and eyespot, but less than 50% of the variation in yield and powdery mildew. Precipitation in May was the factor most consistently related to LBD disease intensity, and adding another two weather factors further improved the degree of explanation. Weather factors in the preceding growing season influenced growth stage, powdery mildew and brown rust. Mild winters and springs favoured the biotrophs such as powdery mildew, brown rust and yellow rust. Statistically significant correlations between incidence and severity were found for LBDs, brown rust and eyespot, but not for yellow rust and powdery mildew. Regression models with disease incidence as dependent variable generally had a higher degree of explanation and lower P-value than models with disease severity as dependent variable. Our results confirm that weather data can be successfully used in wheat disease prediction models.

Authors/Creators:Wiik, Lars and Ewaldz, Torbjörn
Title:Impact of temperature and precipitation on yield and plant diseases of winter wheat in southern Sweden 1983-2007
Series/Journal:Crop protection (0261-2194)
Year of publishing :2009
Volume:28
Number:2009:1
Page range:952-962
Publisher:Elsevier
ISSN:0261-2194
Language:English
Publication Type:Journal article
Refereed:Yes
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Plant and forest protection
Keywords:climate, weather, Septoria tritici, fungicide, disease prediction, forecasting, rain
URN:NBN:urn:nbn:se:slu:epsilon-12-13
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-12-13
ID Code:4167
Department:(LTJ, LTV) > Department of Plant Protection Biology
Deposited By: Lars Wiik
Deposited On:02 Dec 2009 00:00
Metadata Last Modified:02 Dec 2014 10:28

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