Planting Date and Variety Selection for Management of Viruses Transmitted by the Wheat Curl Mite (Acari: Eriophyidae)

Wheat is an important food grain worldwide, and it is the primary dryland crop in the western Great Plains. A complex of three viruses (Wheat streak mosaic, Wheat mosaic, and Triticum mosaic viruses) is a common cause of loss in winter wheat production in the Great Plains. All these viruses are tran...

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Bibliographic Details
Published in:Journal of economic entomology 2016-02, Vol.109 (1), p.70-77
Main Authors: McMechan, Anthony J, Hein, Gary L
Format: Article
Language:English
Subjects:
Acari - physiology
Acari - virology
Aceria tosichella
Agricultural production
Animals
ARTHROPODS IN RELATION TO PLANT DISEASE
Disease transmission
Management
Nebraska
Plant Diseases - virology
Plant viruses
Planting
planting date
Pressure
Seasons
Symptomology
Tactics
Triticum - embryology
Triticum - genetics
Triticum - physiology
Triticum - virology
Triticum aestivum
virus
Viruses
Wheat
wheat curl mite
winter wheat
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Summary:Wheat is an important food grain worldwide, and it is the primary dryland crop in the western Great Plains. A complex of three viruses (Wheat streak mosaic, Wheat mosaic, and Triticum mosaic viruses) is a common cause of loss in winter wheat production in the Great Plains. All these viruses are transmitted by the wheat curl mite (Aceria tosichella Keifer). Once these viruses are established, there are no curative actions; therefore, prevention is the key to successful management. A study was designed to evaluate preventative management tactics (planting date, resistant varieties) for reducing the impact from this virus complex. The main plot treatments were three planting dates, and split-plot treatments were three wheat varieties. Varieties were planted at three different times during the fall to simulate early, recommended, and late planting dates. The varieties evaluated in this study were Mace (virus resistant), Millennium (mild tolerance), and Tomahawk (susceptible). Measurements of virus symptomology and yield were used to determine virus impact. Results consistently showed that the resistant Mace yielded more than Millennium or Tomahawk under virus pressure. In some years, delayed planting improved the yields for all varieties, regardless of their background; however, under the most severe virus pressure the combination of both management strategies was not sufficient to provide practical control of this complex. These results illustrate the importance of using a combination of management tactics for this complex, but also reinforce the importance for producers to use additional management strategies (e.g., control preharvest volunteer wheat) to manage this complex.
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/tov311