Many of these chemicals have now been banned in Japan, Taiwan and the Philippines. There are currently no known chemicals which are safe, effective, and cheap enough for farmers to use. Integrated snail management is being advocated, including hand picking of snails, herding ducks to eat smaller snails, better water control, spot pesticide treatment, and more seeding. However, results of the integrated approach do not reveal how effective each component is. Hand-picking is the most effective but also the most labor intensive.
Ducks are effective but only during one part of the life cycle of the snail.
And improving water control has proven very difficult. Biological controls being considered or tried include raising common carp and Nile tilapia to eat snails, genetically manipulating snails to breed less rapidly, and botanical pesticides. Another strategy is to try to get people to eat the snails by sending out brochures with snail recipes. This invasion is clearly a case of an introduction that should not, and perhaps would not, have occurred if closer policy attention had been directed toward the full set of risks associated with it. It also raises the question of quarantine procedures, which are not very stringent in many industrialized countries, and noticeably absent in many developing countries where there is a lack of both training and regulation on species introductions.