chestnut leaves sickened by chestnut wasp. concept of tree pests. dryocosmus kuriphilus

agricultural announcement approach biology branch castanea chestnut closeup deformed destruction detail disease dryocosmus economy education educational entomology environment european flora foliage gall green infestation insect invasive kuriphilus leaf leaves macro natural nature organic parasite parasitic pest poster sativa selective sick sore space steam vegetable wasp wildlife