Applied Entomology and Zoology (1999) 34, 365-370

T. Wada, K. Ichinose and H. Higuchi (1999)
Effect of drainage on damage to direct-sown rice by the apple snail Pomacea canaliculata (Lamarck) (Gastropoda : Ampullariidae)
Applied Entomology and Zoology 34 (3), 365-370
Abstract: Damage to direct-sown rice by the apple snail, Pomacea canaliculata, was investigated in two semi-held 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.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Takashi Wada

Research topic(s) for pests/diseases/weeds:
control - general
damage/losses/economics

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Pomacea canaliculata	Rice (Oryza)	Japan