 Approximately 1% of the "Pomacea canaliculata" on sale on local markets in Dali City, Yunnan, China were found to be infected with pathogenic "Angiostrongylus cantonensis" in 2009.Crude cyclotide extracts from both Oldenlandia affinis and Viola odorata plants showed molluscicidal activity comparable to the synthetic molluscicide metaldehyde.Because submerging developing eggs below the water reduces hatching success, manipulating the water level in agricultural fields and dammed reservoirs may provide a tool for controlling invasive populations.