Leaf blistering - Ask Extension
My grapevine started giving me symptomps what i though originally were spider mites.... More and more i am inclined to doubt the soil PH, but could be...
Knowledgebase
Leaf blistering #185896
Asked May 27, 2014, 9:26 PM EDT
My grapevine started giving me symptomps what i though originally were spider mites.... More and more i am inclined to doubt the soil PH, but could be wrong.... Third year now - would rally appreciate good help. Thank you.
Hartford County Connecticut
Expert Response
Hello,
This looks like blistering from an the Grape Erineum Mite, Colomerus vitis Pagenstecher (Acari: Eriophyidae). It is an eriophyid mite.
It overwinters under the bark of new growth, emerging in late spring to feed on the under surface of leaves. If infestation is small, remove the leaves and burn or dispose of in the household garbage to get them out of your area. Treat vine with dormant oil when plants are dormant.
This looks like blistering from an the Grape Erineum Mite, Colomerus vitis Pagenstecher (Acari: Eriophyidae). It is an eriophyid mite.
It overwinters under the bark of new growth, emerging in late spring to feed on the under surface of leaves. If infestation is small, remove the leaves and burn or dispose of in the household garbage to get them out of your area. Treat vine with dormant oil when plants are dormant.
"Dormant-season
oils and insecticides used for other pests and sulfur applications for
powdery mildew usually control this pest. Directed controls specifically
for erineum mite usually are not necessary. " from Pacific Northwest Pest Management website.
Regards,
Carol Quish
Regards,
Carol Quish
