pear sucker cacopsylla pyricola crawler nymph on a pear young, unripe fruit

green leaf plant flower insect invertebrate produce nature food animal yellow fruit branch petal arthropod bud pear sucker cacopsylla pyricola crawler nymph young unripe damage annulata mali pyri ants colony pests graze vein black garden ant psylla psyllids honeydew orchard orchards wild phytoplasma psyllid pest tree closeup hemiptera white fauna psyllidae detail bug natural wildlife aphids close lasius niger european control apple proliferation