Shoot fly

The shoot fly Atherigona biseta belongs to the family Muscidae within the order Diptera. This insect is a significant agricultural pest known for attacking various cereal crops, causing economic losses in tropical and subtropical regions where environmental conditions favor its year-round reproduction.

Host plants primarily include maize, sorghum, and millet, although the pest can also inhabit other Poaceae species. The susceptibility of these crops is highest during the early seedling stage, which often determines the overall stand establishment and potential yield of the affected field.

The life cycle of the shoot fly involves egg, larva, pupa, and adult stages. Adult females lay eggs on the leaves of young seedlings. Once hatched, the larvae migrate to the base of the plant and bore into the central stem to feed on the inner tissues, effectively destroying the growing point.

The damage caused by Atherigona biseta is characterized by the 'dead-heart' symptom, where the central shoot of the seedling wilts, yellows, and dies. Severely affected plants may die completely or develop stunted, ineffective tillers, leading to significant gaps in the field and reduced harvest quality.

• Implementation of crop rotation to break the pest's reproductive cycle.
• Destruction of wild grass hosts that serve as reservoirs for the fly.
• Use of systemic insecticide-treated seeds to protect young seedlings.
• Timely sowing dates to ensure plants reach a less susceptible stage before peak pest activity.
• Regular field scouting to monitor population levels and apply timely intervention when necessary.