Final diagnosis


Grapevine fanleaf virus (GFLV) (Short knot)

Under the influence of the <b> short knotted </b>, the leaves of this vine turn yellow almost completely.
Short knot
Grapevine severely affected by the <b> short knotted </b>. Rather stunted in appearance, all its leaves are more or less yellow. <i> Grapevine fan leaf virus </i> (GFLV)
Leaf discolorations are more or less marked. <i> Grapevine fan leaf virus </i> (GFLV) <b> short knotted </b>
Multiple facies of the symptoms of <b> short knotted </b> on the leaves of the same vine.
Many leaves show very marked yellowing. <i> Grapevine fan leaf virus </i> (GFLV) (<b> short knotted </b>)
Aspect de feuilles de vigne affectées par le <i>Grapevine fan leaf virus</i>. (GFLV) <b>court noué</b>
On the left leaf, vein discoloration is seen extending to part of the leaf blade on the right leaf. <b> Short knot </b>.
Yellowing beginning of veins on vine leaf. <i> Grapevine fan leaf virus </i> (GFLV) (<b> short knotted </b>)
Evolved nerve yellowing on vine leaf. <i> Grapevine fan leaf virus </i> (GFLV) (<b> short knotted </b>)
On this branch the internodes are shorter and reveal a "zig-zag" growth. <i> Grapevine fan leaf virus </i> (GFLV) <b> short knotted </b>
Example of a plot with some vines showing the symptoms of <b> Short knot </b>.