What characterizes the first true bud on a grapevine?

The first true bud on a grapevine is characterized by the presence of a definite internode about a quarter inch from the base of the cane. This internode is important as it indicates that the bud is not just a latent or non-viable bud, but a true vegetative bud that has the potential to grow into a shoot. The presence of this internode suggests that the bud has begun to develop properly and is situated in a location that supports its growth.

In grapevine management, understanding the characteristics of buds is crucial for effective pruning and maximizing yield. This specific feature of a true bud helps distinguish it from other types of buds that may not contribute to the plant's growth in the same way. Recognizing the location and structure of the first true bud can guide growers in decision-making for vine training and crop management.