The driving effect of water immersion on Pomacea canaliculata eggs
Pomacea canaliculata poses a significant threat to agricultural wetlands, yet chemical control measures raise environmental concerns. This study aims to evaluate timed water submersion as a non-chemical strategy for suppressing egg hatching of this invasive species. Controlled inundation was tested as a non-chemical strategy to suppress egg hatching of the invasive P. canaliculata, and egg abundance was estimated using morphometric egg-mass parameters under laboratory conditions. Short-term immersion (1–2 days) produced no significant reduction in hatching rate, while immersion for 4–5 days significantly delayed embryonic development and reduced final hatching success. Complete hatching failure was observed for eggs subjected to continuous five-day submersion under standardized laboratory settings. Visual observations of 10-day prolonged flooding, which triggered extensive egg detachment and embryonic necrosis, were only auxiliary qualitative recordings and were not included in the formal quantitative hatching trial spanning 0–5 immersion days. Morphometric analysis confirmed a significantly positive linear correlation between egg number and egg-mass longitudinal length (p < 0.05), enabling non-destructive egg-quantity prediction based on egg-mass length. Our results confirm that timed water submersion serves as an eco-friendly alternative for controlling golden apple snail proliferation, yet further field validations are required before large-scale agricultural application.
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