‘Inconvenient beneficial insects’ Lovebugs are back; peak expected this week

The 'lovebug' season has returned to South Korea's capital region, with large numbers of the red-backed leaf beetle, known locally as 'lovebugs,' emerging. The insects are predicted to be most active around June 24, with their numbers expected to decline significantly about two weeks after the peak, owing to their short lifespan.

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Lovebug complaints have been coming in since the 15th.

Despite being harmless and ecologically beneficial, they help purify soil as larvae and act as pollinators as adults, the lovebugs' mass appearances since 2022 have caused considerable public nuisance and a surge in complaints. Seoul's infectious disease management division reported receiving complaints about the beetles starting mid-June, mirroring the situation in areas like Incheon's Gyeyangsan mountain, which was heavily infested last year.

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Adults live for only 3-4 days for males and 7 days for females, so numbers tend to decrease rapidly about two weeks after a large outbreak.

Experts attribute the increased proliferation of lovebugs to rising temperatures linked to climate change, which has also expanded their habitats. Investigations reveal larvae are now present in many areas of Seoul, Incheon, and surrounding Gyeonggi Province, including regions where they were not previously observed. To manage the situation, Seoul has deployed over 4,800 traps using attractants, and local districts are planning large-scale water spraying operations, leveraging the beetles' sensitivity to water. Residents are advised to wear dark clothing outdoors, as the bugs are attracted to light colors, and to wash vehicles promptly to prevent paint damage from accumulated insect bodies.

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Lovebugs are not toxic and do not transmit diseases. As larvae, they purify soil by decomposing organic matter, and as adults, they contribute to ecological cycles by transferring pollen like bees; they are beneficial insects.