leaf of a horse chestnut infected with the bacterium pseudomonas syringae

leaf horse chestnut infected bacterium pseudomonas syringae chestnuts are years leaves dry summer turn brown infested autumn background branch browning cameraria closeup color colorful damage disease environment europe european fall forest fungal garden green hippocastanum horsechestnut isolated leafs moth natural nature object ohridella outdoor parasite pest plant season shape sick significant texture tree trees vegetation withered yellow