the agronomist holds in his hand a twisted leaf of a currant bush

agricultural agronomist anthracnose aphid berry branch bush care cecidomyiidae close closeup crop cultivation currant damage dasineura disease filipendula fresh fungus gall gallic garden gardening growth hand his holding holds illness infected infection insect leaf leaves midge midges mold natural parasite pest pesticides pests plant plantation problem red shrub sick signs stem suffering twisted ulmaria