Worldwide. In Australia and most Pacific island countries.
Minor pest of brassica, cucurbit, legume, potato, grass families. Also breeds in decaying organic matter. Major hosts: beans, cabbages, cauliflowers, melon, orange, sorghum (causes ‘deadhearts’), and tomato.
Maggots do the damage, but presence does not mean they are the cause.
Eggs laid under calyx of fruit, in cracks, grooves, or rots caused by physical damage and those of other insects. Maggots white, 4-6 mm long. Pupae dark orange-red. Adults yellowish-grey fly, squarish head, up to 4 mm long, wingspan 3 mm, dark thorax and yellow abdomen.
Natural enemies: pupal parasitoids.
Biosecurity: regulated pest in New Zealand.
Cultural control: avoid use of chicken manure as flies may use it to breed.
Chemical control: not recommended, but if needed use neem.