What is a common consequence of inadequate watering after pruning?

Inadequate watering after pruning can lead to increased disease susceptibility in grapevines. When a vine does not receive sufficient water, it becomes stressed, making it more prone to infections from pathogens like fungi and bacteria. Stress weakens the plant's defenses and may hinder its ability to recover from the pruning process. This is particularly critical after pruning, as the vine requires adequate moisture to heal its wounds and support new growth. If the plant is already facing water stress, it may struggle to fend off diseases, ultimately impacting its overall health and productivity.

The other options suggest outcomes that are unlikely in the context of inadequate watering. Improved vine structure and higher fruit yield are typically associated with optimal care and conditions, including proper watering. Delayed grape maturation can occur due to various factors, but in this case, it is primarily the pursuit of a healthy vine that underscores the risk of increased susceptibility to diseases when watering is inadequate. Proper management of water principles is essential for the successful post-pruning recovery of grapevines.