Citrus blossom midge

The citrus blossom midge (Contarinia citri) is a significant pest belonging to the order Diptera and the family Cecidomyiidae. It is a specialized insect that targets citrus orchards, causing considerable economic losses by damaging reproductive parts of the trees.

This pest primarily attacks various citrus species, including lemons, oranges, and mandarins. The damage is most critical during the budding and early fruit set stages, as the larvae feed inside the buds and ovaries, directly affecting the potential yield of the orchard.

The life cycle involves multiple generations per year, depending on the environmental temperature. Females lay eggs inside the floral buds. Upon hatching, the larvae feed on the developing tissues, which causes the buds to deform, swell, or drop prematurely, preventing normal fruit development.

The economic impact of Contarinia citri is mainly associated with fruit loss and reduced market quality. Heavy infestations can lead to a drastic reduction in the harvest, especially in susceptible cultivars, as the damage often occurs before growers can visually detect the signs of infestation.

Effective management and control strategies are essential for citrus growers:

• Monitor adult flight activity using pheromone traps to time treatments correctly.
• Remove and destroy infested buds and fallen fruit to break the life cycle.
• Apply selective insecticides during the peak periods of adult activity and egg-laying.
• Encourage biological control agents, such as parasitoids, that naturally regulate midge populations.