Definition - What does Nodosity mean?

Nodosity commonly occurs on the roots of grapevines. The nodes have the appearance of bumps or knot-like protrusions. They are the result of the accumulation and clustering of some genes which are involved in the metabolization of starches.

While nodosity in a vine can be benign, excessive formations are unhealthy and may be a sign of disease or the presence of a pest.

WineFrog explains Nodosity

The occurrence of nodosity in the root structure of a grapevine can be detrimental to the overall health of the vine.

It first may be the symptom of underdeveloped suberized endodermis.

The nodes are forms which are pouch-like leaf galls or superficial root galls. These types of galls are a sign that phylloxera has infected the vine. These insects attach themselves to the root and feed on its cortex and cause the build-up of amino acids and starch, creating deformations (nodosity). If not treated, it will eventually lead to necrosis and the destruction of the root system, and eventually, the death of the vine.

Share this:

Connect with us

Never Miss an Article!

Subscribe to our free newsletter now - The Best of WineFrog.