Key Facts
• July 3, 2025: Second pest warning issued for stink bug infestation.
• 84.4% of survey sites in the prefecture confirmed stink bug presence.
• Average capture rate: 19.4 bugs per site, nearly three times the usual.
• Infestation rate exceeds the annual average by 20.6 percentage points.
• Early rice varieties like Tentakaku at risk by late July; Koshihikari by early August.
• High temperatures and low rainfall may worsen the infestation.
• Authorities urge farmers to mow field edges and apply pesticides appropriately.
Summary
A significant surge in stink bug populations, nearly three times the usual levels, has prompted the prefecture to issue its second pest warning of 2025. Surveys revealed that 84.4% of sites across the region are affected, with an average capture rate of 19.4 bugs per site. This infestation rate surpasses the annual average by 20.6 percentage points, matching last year’s severe outbreak. Early rice varieties like Tentakaku and Koshihikari are particularly vulnerable as their growth phases approach. High temperatures and low rainfall this year may exacerbate the problem. Authorities recommend mowing field edges and timely pesticide application to mitigate potential damage.
