The
series of slices (right) off the compound bud of 'Baco Noir' grape
begin near the apex of the bud (A) and progress through the three
buds in the grape "eye" to the base (F). Photos
courtesy of Dr. Thomas Zabadal, Michigan State University.
The
primary bud is the least hardy and the most fruitful. To evaluate for
injury, look down at the pointed top or apex of the compound bud and slice
off the top quarter with a razor parallel to the base of the bud. If the
primary is alive it will be bright green in the center. It will be brown
or black in the center if it is dead. If you are unfamiliar with this
technique, begin at the tip of the compound bud and slice it until the
three single buds are seen. Slice below these buds in the cambial region
of the cane to learn to distinguish the more olive green smooth textured
cambium of the cane from the brighter green bud center with concentric
rings of tissue.
