mango leaves are deformed by gall midges, resulting in gall formation

aesthetic egg ecosystem nodule branch horticulture botanical larva bump injury eudicot insect pests mangifera indica tree plant swelling brown gall gnats closeup spot pathogen biological nymph lesion damage mango seed fruit scientific pattern agriculture midges dicot angiosperm macro disease biodiversity green nature texture black leaf foliage infestation deformity growth stem leaves deformed formation heavily infested midge eggs numerous small round galls common symptom impact health productivity trees