Blister leaf mite on grapevines
Would feeding the vine with flowers of sulphur help??
Flowers of sulphur will not treat Blister Mites.
Flowers of sulphur is an antiseptic and anti fungal, it will help in control of issues such as powdery mildew. Powdery Mildew can lead to plant stress, then in turn plants become susceptible to infestations and disease.
Here is a link with more information.