Use of NAA and Vegetable Oil to Delay Bud Break In Vitis Spp

Wednesday, September 28, 2011: 10:30 AM
Kohala 3
Paul E. Read, Professor of Horticulture and Viticulture , Agronomy and Horticulture, University of Nebraska, Lincoln, NE
Issam M. Qrunfleh , Dept. of Agronomy & Horticulture, University of Nebraska-Lincoln, Lincoln, NE
Delaying bud break is one approach to aid viticulturists in avoiding the negative impact of late spring cold weather events, which are especially common in continental climate regions.  Field experiments were initiated on a commercial vineyard near Raymond, Nebraska by spraying 'Edelweiss' grapevines with several rates of naphthaleneacetic acid (NAA) and a soybean oil-based commercial oil, Amigo oil.  Treatments were applied in January, February, March and April in 2009 and 2010.  Bud break delay ranged from two to six days in 2009 and 8 to 12 days in 2010. Oil and 1000 ppm NAA exhibited the most significant delays, with no negative impact on yields, cluster weights, berry weights, soluble solids, pH and tiratable acidity.
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