diseased pear leaves. disease of leaves and vines of pears close-up of damage to rot and parasites. the concept of protection of

aecia aerosol agriculture aphids assault attack autumn branch brown burnt damage detail disease diseased environment farm fruit fungal fungi fungicide fungus fuscum garden green gymnosporangium infestation leaf leaves macro natural nature orange pathology pear pest plant pome pyrus red rust rusty sabinae stain summer toxic tree trellis unhealthy virus