Southern Masked Chafer

Fascinating facts about the Southern Masked Chafer

• When night passes 11 pm in the breeding season, both sexes of southern masked chafer retreat beneath the soil, leaving any unmated female on the surface isolated. Research shows that such a lone female, if trapped above ground, begins to lure male northern masked chafers, a close relative. The northern species normally begins its own mating after midnight and appears to rely on the same volatile attractant, so the misplaced signal triggers cross-species interest.
• Larvae of the southern masked chafer release a pheromone, and when a larva is on the soil surface an adult male may approach and attempt copulation, mistaking the larval signal for that of a receptive adult. This behavior is unusual because larvae normally stay entirely underground until they pupate, limiting contact with adult beetles.
• The soil bacterium milky spore (Paenibacillus popilliae) can infect southern masked chafer larvae, causing a developmental delay that prevents them from pupating on schedule. As a result, infected larvae remain longer in the soil and are sometimes observed on the surface, where they become visible to researchers. This delayed growth makes the normally hidden larvae unusually conspicuous during the adult emergence period.
• Adult southern masked chafers cause no harm, but the eggs they lay underground hatch into white grubs that grow to about 2.5 cm long. These larvae feed on the roots of grasses, and when the soil is dry the plants cannot draw enough moisture, turning brown and dying. The loss of root mass means dead tufts can be pulled from the ground with little effort. This root loss creates the characteristic brown, dead patches seen on affected lawns.
• In the midwestern United States the white grubs of this beetle are considered among the worst turf pests, sharing that dubious title with the larvae of the Japanese beetle. When their populations are high, the feeding larvae can cause the death of turf over large areas of lawn. Ants such as the thief ant normally prey on the eggs and larvae, but insecticide use can suppress these natural predators and worsen the damage.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Southern Masked Chafer

In the warm, golden light of a summer's evening, the Southern Masked Chafer emerges, its bronze elytra glimmering like polished jewels as it takes to the air with a soft, whirring hum. With an effortless elegance, this diminutive beetle dances through the long grass, its delicate legs a blur of movement as it navigates the intricate tapestry of its natural world. As it moves, the very earth itself seems to come alive, the chafer's presence a testament to the beauty and wonder that lies just beneath our feet.

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