Mango gall midge

Systematic position. The mango gall midge (Asynapta mangiferae) belongs to the order Diptera, family Cecidomyiidae. This insect is a specialized pest that is closely associated with the reproductive development of various mango cultivars.

Host crops and damage symptoms. The pest exclusively attacks the mango tree (Mangifera indica). The larvae cause the primary damage by boring into the developing fruit ovaries. As they feed, they trigger rot within the fruit, leading to premature fruit drop and significant losses in marketable yield.

Biology and life cycle. The life cycle of the midge comprises the egg stage, three larval instars, the pupal stage, and the adult stage. The adult midges are tiny flies that lay their eggs directly into the soft tissues of young fruit. The larvae develop within the damaged areas and subsequently pupate in the soil beneath the tree canopy or in organic debris.

Economic impact. The economic threat posed by this species lies in its ability to cause massive damage to fruits during their formative stages. In cases of high population density, fruit loss can become extreme, rendering the affected crop unsuitable for market or export due to internal necrosis and tissue decay.

Control measures. Integrated pest management (IPM) is essential to control Asynapta mangiferae population levels:

• sanitary collection and destruction of fallen infested fruit;
• tilling the soil under the canopy to disrupt the pupation sites;
• application of insecticides during the adult emergence phase;
• regular monitoring using pheromone or sticky traps.