Can you help me please to know which infection i have in my grapes trees
Could you take another picture and include more of the plant?
This picture is too close up for me to tell
The leaf and the flower cluster look normal.
The wilted shoot looks like it could be downy mildew (white) of powdery mildew (gray)
The first picture looked like phomopsis with the sunken black lesions.
Still cannot tell which disease you have.
Look at some of these links.