aphids are sucking juice of the apple-tree leaves and ant is pasturing them

agricultural agriculture ant aphid aphididae aphidina aphidoidea aphids aphis appletree attack background bite blister blue bug bugs close colony common crowd crowded damage elder entomology environment farming feed flock formicidae garden gardening graze hemiptera heteroptera homopterous insect insects invasion kill nutriment outdoor parasite pasture pest predator sap sky stalk stem suck sucking suction the varmint vermin