Bean seed fly

Bean seed fly, small gray flies measuring 3 to 6 mm.

Also known as:
Seedcorn maggot

recognize a bean seed fly
Bean seed fly, photo: Caroline Harding, MAF - CC BY 3.0 au

Bean seed fly (Delia platura) Small, gray flies measuring 3 to 6 mm. The seed bean fly affects the roots and growing points of germinating seeds.


In horticulture, the bean seed fly is controlled with plant industrial insecticides. This is not possible in the vegetable garden or allotment.


Keep the bean seed fly away by sowing a row of buckwheat: this attracts parasitic wasps, the bean seed fly’s natural enemy. When greenhouse growing, provide the windows with insect netting, this will keep the bean seed flies out.