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ARS Home » Northeast Area » Washington, D.C. » National Arboretum » Floral and Nursery Plants Research » Research » Publications at this Location » Publication #329333
Title: Response of yellow flowering magnolia varieties to powdery mildew, 2015

Author
item BAYSAL-GUREL, FULYA - Tennessee State University
item Fare, Donna
item LIYANAPATHIRANAGE, PRABHA - Tennessee State University

Submitted to: Plant Disease Management Reports
Publication Type: Other
Publication Acceptance Date: 6/25/2016
Publication Date: 9/5/2016
Citation: Baysal-Gurel, F., Fare, D.C., Liyanapathiranage, P. 2016. Response of yellow flowering magnolia varieties to powdery mildew, 2015. Plant Disease Management Reports. 10:007.

Interpretive Summary:

Technical Abstract: Yellow flowering varieties of Magnolia spp. hybrids were planted in April 2008 in a field plot with Waynesboro loam soil at the Otis L. Floyd Nursery Research Center in McMinnville, TN. Severity of powdery mildew was determined on 14 Jul, 21 Aug and 15 Oct using a scale of 0-100% foliage affected. Powdery mildew appeared naturally and disease pressure was high in this trial. There were significant differences among varieties in severity of powdery mildew. Powdery mildew severity on 15 Oct was significantly lower in ‘Sun Spire’, ‘Elizabeth’, ‘Banana Split’ and ‘Carlos’ than in the other varieties. Season-long disease progress (AUDPC) was highest in the magnolia varieties ‘Green Bee’, ‘Gold Star’ and ‘Stellar Acclaim’.