摘要：Of a number of herbicides used in Pistia clearance, as a control measure of rural filariasis ( Wuchereria malayi ) in Ceylon, Phenoxylene 30 (MCPA) and 2,4-D amine salt were found to be the most effective, cheapest, and easiest to handle. 56 ml (2 fluid ounces) of Phenoxylene 30, and 28 ml (1 fluid ounce) of a wetting agent (“Teepol”), were added to 4.2 litres (approximately 1 Imperial gallon) of water, and 163 litres (36 gallons) were sprayed over 4,046 m2 (1 acre) of water covered with Pistia . It is much more effective to spray young Pistia , which will be killed in about a week. Excellent results were obtained, during a large-scale field experiment, with a single application. The total cost per acre was Rs20, being only one-sixth that of manual removal. The methods of application are described. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (284K), or click on a page image below to browse page by page. 571 572 573
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