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Snail Invader: Japan's Failed Food Venture Turns Pest
19 Aug
Summary
- Golden apple snails were imported to Japan in 1981 for a food business.
- The venture failed due to lack of demand, leading to snail escape and spread.
- These snails now destroy young rice seedlings and persist as agricultural pests.
Golden apple snails, initially imported to Japan in 1981 from Taiwan, were intended to establish a new food business. However, the venture collapsed within a few years due to a lack of consumer demand in Japan.
Escaped from now-defunct farms, these invasive snails, known locally as "jumbo tanishi," have since spread throughout southern and central Japan's irrigation canals and rice paddies. They are now a significant agricultural pest.
These omnivorous snails voraciously consume young rice seedlings, severing stems near the ground. Their ability to burrow and remain dormant during unfavorable conditions, combined with rapid reproduction, facilitates their spread.
Over four decades later, Japan manages the pest through methods like water level control, manual removal of eggs and snails, biological agents like ducks, and molluscicides. The snail's history serves as a stark warning about failed ventures becoming lasting ecological problems.
