Acrolein for the control of water weeds and disease-carrying water snails.

Injection of the biocide acrolein into irrigation canals killed submersed weeds, thereby reducing flow resistance and increasing capacity. In a 20-mile canal, 150 gallons raised throughput from 311 to 552 ft(2)/sec. Acrolein also effectively eradicated aquatic snails; it promises to become a useful tool in the battle against Schistosoma blood flukes.