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Red-necked longhorn beetle spread in Japan

Updated 2 times since CLSTR started tracking revisions of this situation.

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2026-08-29 04:27 UTC → 2026-09-03 11:05 UTC · added removed

The invasive red-necked longhorn beetle (Anoplophora chinensis) has been confirmed in Okayama and Fukui prefectures. In Okayama, the beetle was identified at Okayama Korakuen and surrounding areas, affecting four cherry trees. Authorities have initiated investigations of schools and parks within a 2km radius to mitigate risks to peach orchards and cherry blossom sites. In Fukui, the first sighting in the Hokuriku region occurred in Oi Town. Recent investigations in the town have found evidence of Town, where larvae were found in nine cherry trees and 13 plum trees. Local officials have expressed concern regarding the potential spread The infestation has expanded to cause significant damage to fruit orchards in Saitama and Nagano prefectures. In Saitama, the Reinan region, where Obuse plum cultivation is significant. Because groves—one of the beetle region’s three major plum forests—are under threat, with approximately 10% of the 5,000 plum trees already affected. The impact on farmers is highly prolific severe; some have been forced to abandon their businesses because infested trees must be felled, and capable of laying new trees require up to 1,000 eggs, authorities are urging residents 15 years to inspect tree bases for holes or frass—a mixture bear fruit. Mitigation is complicated by the high cost of wood dust specialized netting and excrement—and report suspicious findings. This species, native the inability to China use pesticides intended for cherry trees on edible plum trees. In Nagano Prefecture, the infestation is also expanding. Local authorities in areas such as Saku City and Sakuho Town have begun distributing specialized pesticides to farmers to combat the spread. Native to China, Vietnam, and the Korean Peninsula, this species poses a critical threat to the Rosaceae family, including cherry, peach, and plum trees as larvae bore into the wood. trees. Since its initial discovery in Japan in 2012, the beetle has expanded to 22 prefectures. The prefectures, prompting the Ministry of the Environment emphasizes to emphasize that early eradication is critical vital to preventing further spread.

Versions

  1. 2026-09-03 11:05 UTC Red-necked longhorn beetle spread in Japan
  2. 2026-08-29 04:27 UTC Red-necked longhorn beetle spread in Japan
  3. 2026-08-21 07:57 UTC Red-necked longhorn beetle spread in Japan

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