Mastor vialis

Adult mastor vialis are likely attracted to flowers that provide nectar. Therefore, setting up a trap with nectar plants or artificial nectar solutions can be effective in attracting mastor vialis. For the larval stages, placing host plants that caterpillars of this species feed on could serve as a lure.

The eggs of mastor vialis are typically laid singularly on the underside of host plant leaves. Caterpillars, after hatching, reside within shelters made from rolled or tied leaves of their specific host plants, where they also feed. To observe them, one must thoroughly inspect host plants, focusing on leaf anomalies suggestive of larval habitation. Pupae remain in the same shelters, camouflaged and secured until metamorphosis into adulthood. Adult mastor vialis, which are strong fliers, are often encountered in open, sunny areas with nectar-rich flowers, including gardens, meadows, and roadsides. For the best chances of sighting adults, one should visit these habitats on warm, clear days when these insects are most active.

The best time to find mastor vialis typically depends on its life cycle and activity patterns. Adults are usually active during the daytime, especially on sunny days when they are out for feeding and mating. The early stages, such as eggs and caterpillars, might be found throughout their host plants' growing season.

Warm and sunny weather often increases the likelihood of finding adult mastor vialis, as these conditions are ideal for their flight and nectar feeding activities. Light rain might be suitable for finding larval stages as they are less mobile and less likely to seek shelter from precipitation.