Temperature and Alternative Hosts InfluenceAceria tosichellaInfestation andWheat Streak Mosaic VirusInfection

• DOI: 10.1094/pdis-06-17-0782-re
• Publication Date: 2017-10-09T12:53:56Z
• Authors: Nar B. Ranabhat; Tim Seipel; Erik A. Lehnhoff; Zach J. Miller; Karl E. Owen; Fabian D. Menalled; Mary E. Burrows
• Keywords: Potyviridae

Wheat streak mosaic, caused by mosaic virus (WSMV; family Potyviridae), is the most important and common viral disease of wheat (Triticum aestivum L.) in Great Plains North America. WSMV transmitted curl mite (WCM; Aceria tosichella). We evaluated how mean daily temperatures, cumulative growing degree-days, day year, surrounding alternative host identity affected WCM infestation infection from late summer through early autumn Montana, United States. Cumulative warm temperatures (i.e., >10°C), hosts interacted to alter risk infection. surrounded Bromus tectorum L. preharvest volunteer had rates 88% years when temperature was 15°C October, compared with 23% bare ground, <1% 0°C regardless host. Mean cereal-growing regions Montana during are marginally conducive population growth movement. As region continues warm, period movement will become longer, potentially increasing frequency outbreaks.