the reverse side of the leaf walnut affected by nut felt gall mite eriophyes tristriatus var. erineus nal

affected cultural deciduous disease ecological ecology erineus eriophyes eriophyidae family felt flora gall gallic gauls infected juglandaceae juglans leaf leaves mite nal nature nut parasite plant problem quadruped regia reverse side spot struck summer tick tree tristriatus var walnut wrecker