curled leaves on sweet cherry tree caused by black cherry aphids myzus cerasi infestation.

agriculture aphid aphidoidea aphids aphis biology black blackfly branch caterpillar caused cerasi cherry colony curl curled damage deformed disease eggs foliage fungal fungus garden gardening green growing infection infestation insect insecticide larvae leaf leaves monitoring myzus nymphs parasite pathogen pathology pest photosynthesis phytophthora plant problem protection shriveled stem sweet symptom tree