- 著者
- Takashi Wada Katsuya Ichinose Hiroya Higuchi
- 出版者
- JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY
- 雑誌
- Applied Entomology and Zoology (ISSN:00036862)
- 巻号頁・発行日
- vol.34, no.3, pp.365-370, 1999-08-25 (Released:2008-02-07)
- 参考文献数
- 25
- 被引用文献数
- 12 16
Damage to direct-sown rice by th apple snail, Pomacea canaliculata, was investigated in two semi-field experiments using rain-free experimental plots (each 2 m2 in area). Four snails (2 snails/m2), with shell heights of approximately 19 mm or 24 mm, were released in the plots at the time of sowing When the plots were irrigated soon after sowing (0 or 4 days after sowing), the snails fed avidly on young seedlings and no plants became established Drainage after sowing greatly reduced snail damage. Eighty seven to 94% of plants as compared to the control plots without snails were established when plots were drained for two weeks. Three weeks of drainage could almost prevent damage by snails (95-99% of plant establishment) when the plant age was at about the 5.0 leaf stage. Snail damage was more severe when herbicide was applied. Water management after sowing in direct-seeded rice is discussed in view of reducing snail damage.