Integration of cultivar resistance and fungicide application for control of wheat stripe rust

Stripe rust, caused by Puccinia striiformis f. sp. tritici , is one of the most destructive diseases of wheat. The disease is mainly controlled by growing resistant cultivars and applying fungicides when necessary. To determine potential yield loss and fungicide response, major cultivars grown in th...

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Bibliographic Details
Published in:Canadian journal of plant pathology 2014-07, Vol.36 (3), p.311-326
Main Author: Chen, X.M
Format: Article
Language:English
Subjects:
chemical control
cultivars
disease epidemic
durable resistance
experimental design
fongicides
fungicides
integrated control
lutte intégrée
perte de rendement
pesticide application
profits and margins
Puccinia striiformis
Puccinia striiformis f. tritici
résistance durable
spring wheat
stripe rust
Triticum aestivum
winter
winter wheat
yield loss
épidémie
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Summary:Stripe rust, caused by Puccinia striiformis f. sp. tritici , is one of the most destructive diseases of wheat. The disease is mainly controlled by growing resistant cultivars and applying fungicides when necessary. To determine potential yield loss and fungicide response, major cultivars grown in the US Pacific Northwest and susceptible checks were tested in complete split-block design experiments. From 2002 to 2012, stripe rust caused yield losses ranging from 18% to more than 90% and from 5% to more than 50% with an average of 44% and 33% on susceptible winter and spring wheat checks, respectively. Without fungicide application, the commercially grown cultivars with various levels of stripe rust resistance could reduce potential yield losses to 2–21%, with an average of 8% for winter wheat, and to 0–27% with an average of 13% for spring wheat. Significant or insignificant effects of fungicide applications on yield increase were determined for each cultivar, and the results were used to guide stripe rust management by selecting resistant cultivars to grow and appropriately applying fungicides under different levels of stripe rust epidemic. The results should be useful for developing wheat cultivars with high durable resistance, and for improving chemical control in order to minimize yield losses and maximize profits while protecting the environment by reducing use of fungicides.
ISSN:1715-2992
0706-0661
1715-2992
DOI:10.1080/07060661.2014.924560