A panicle is a branched flower cluster. Mango panicles usually develop at shoot tips and carry many small flowers, including male flowers and flowers with both male and female structures. Only a small fraction normally become mature fruit, so numerous fallen flowers are not by themselves evidence of crop failure. Inspect the condition of the whole cluster, pollinator activity, weather, and developing fruitlets when judging flowering success rather than expecting every flower to produce a mango.
Phenology is the study and recording of recurring biological stages in relation to environmental conditions. For a mango grower, useful stages include flushing, shoot rest, panicle emergence, bloom, fruit set, and harvest. A local record can show why an apparently sensible pruning or irrigation schedule produced a different result in another season. Dates alone are less informative than dates paired with weather, tree condition, and observations of the actual developmental stage.
Pollination is the transfer of pollen to a flower's receptive stigma. Mango panicles bear male flowers and bisexual flowers, and insects such as flies and bees can help move pollen between them. A mango can often set fruit without a second cultivar, but pollination is only one step: fertilization, weather, disease, and the tree's resources also influence retention. Protect useful flower visitors and avoid interpreting every fallen flower as evidence that the tree needs a pollination partner.
Powdery mildew is a fungal disease that can produce whitish growth on susceptible mango flowers, young fruit, and other tissues. Flower infection can reduce fruit set even if the rest of the tree looks vigorous. It is different from sooty mold, which grows on insect honeydew, and should not be diagnosed solely from a distant photograph. Monitor emerging panicles, compare symptoms carefully, and seek locally appropriate guidance before using a product, especially where pollinators are visiting flowers.