walnuts on a tree. disease pest on walnut leaves. eriophyes tristriatus nal or nutty gall mite.

agricultural agriculture botanical branch close closeup crop cultivate cultivated disease eriophyes foliage food fresh freshness fruit gall garden green grow growing growth harvest health ingredient leaf leaves macro mite natural nature nut nutrition nutshell nutty orchard organic parasite pest plant produce raw season seed shell tree tristriatus unripe vegan walnut walnuts