Opomyza florum

Description

5 to 5.5 mm. Orange species with a brown abdomen and with four dark wing markings.

Identification difficulty
ID guidance
  • scutellum hairy with 4 bristles
  • anal vein present
  • costal margin clear (except for tip)
  • abdomen orange/brown
  • wings with only 4 dark marks
Habitat

Meadows, fields of cereal crops and water margins.

When to see it

Flies hatch in June and July, and will be found in grassland and well wooded areas until late August, then they start to move to cereal fields where they can be found until the end of October.

Life History

Larva feed on the stems of grasses and can be a pest of cereals. Especially common in early sown wheat crops by late September and October, where they lay their eggs at the base of the plants. As the larva feeds on the stem's interior tissues this results in stunted growth and in high population times this can cause significant cereal crop damage.

UK Status

Widespread in England and Wales, fewer records from Scotland.

VC55 Status

Common in Leicestershire and Rutland

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map

Species profile

Species group:
Flies
Kingdom:
Animalia
Order:
Diptera
Family:
Opomyzidae
Records on NatureSpot:
19
First record:
05/10/2009 (Calow, Graham)
Last record:
29/09/2023 (Nicholls, David)

Total records by month

% of records within its species group

10km squares with records

The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.

In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.

Latest images

Latest records