Great banded grayling

Systematic position
The Great banded grayling (Brintesia circe) belongs to the Nymphalidae family, specifically the Satyrinae subfamily. While largely recognized as a butterfly species of interest to collectors, its larval stage functions as a herbivore that interacts with various grass species within and around agricultural ecosystems.

Host crops and distribution
The species thrives in sunny, open habitats including grasslands and edges of woodlands. Its larvae primarily feed on various Poaceae species, such as Festuca, Poa, and Lolium. In agricultural contexts, they may inhabit forage grasses or weeds present in field margins, potentially impacting pastures and forage production.

Biology and lifecycle
The lifecycle of Brintesia circe is univoltine, meaning there is one generation per year. The overwintering stage is the early-instar larva. As temperatures rise in spring, the larvae become active and feed on host grasses. Pupation occurs in early summer, often near the base of the food plants, with adults emerging from July through early autumn.

Type of damage and impact
The damage is caused by the larvae, which consume grass foliage. They typically feed at night or in subdued light, causing defoliation that can reduce the biomass of grasses. While significant outbreaks are rare in intensive commercial crops, heavy infestations in grasslands can negatively impact the yield and nutritional quality of pasture vegetation.

Control measures
Integrated pest management is rarely required due to the low economic threshold of this species. Standard agricultural practices are usually sufficient to maintain populations at a non-damaging level:

• Timely mowing of field margins to remove primary food sources;
• Weed management in field perimeters;
• Promotion of natural predators such as birds and parasitoid wasps.