disease of salix leaves close-up. damage to gall mites. aculus tetanothrix. sick leaf of willow infected with mite

gall salix disease mite leaf eriophyidae aculus willow protection ecology nature sick damage vasates tree parasite tick summer pathogen pathology pest spot problem pesticide macro agriculture background bacteria branch broken closeup illness foliage danger diseased growth warts gardening insect fungi colony galls organic detail plant leaves mites