We assessed the amount of primary bud kill resulting from the low temperature on February 13th. Mortality was severe in most of the plantings. We had a low winter temperatures of -9 recorded here at the at the station in December 2022.  Grapevines were healthy going into winter. Samples were collected from the following unpruned cultivars and vineyards.

 

Cultivar/Vineyard	# Buds Sampled	# Killed Primaries	% Primary Bud Mortality
Norton – Foundation	102	83	81%
Vignoles – Foundation	153	109	71%
Chambourcin – Foundation	103	103	100%
Chardonel – Foundation	103	91	88%
Vidal Blanc – Foundation	188	172	91%
Traminette – Foundation	128	102	80%
Cayuga White – Foundation	153	133	87%
Norton – North	177	104	59%
Seyval Blanc – Research	123	100	81%
Catawba – Research	69	48	70%
NC-6 Foundation	124	114	92%
NC- Genomics	65	61	94%