el Sawy M F, Duncan J, Amer S, el Ruweini H, Brown N, Hills M
Trop Med Parasitol. 1987 Jun;38(2):101-5.
A comparative trial of freshly-harvested and dry forms of the plant molluscicide, Ambrosia maritima is described. The plant was grown near Alexandria, Egypt and gave a weight ratio of 4:1 for fresh: dry, mature plants. Applications of plant material were made to irrigation watercourses at dosage levels of 560 mg . l-1 fresh and 70 and 140 mg . l-1 dry in May and 280 mg . l-1 fresh and 70 mg . l-1 dry in June. Snail numbers were reduced to low levels after two weeks in all treatments. Statistically significant differences could not be detected between the molluscicidal effects of fresh and dry material or their use in May and June. The cultivated plant has a similar order of activity to that collected from the wild. The snail number reduction was maintained to the end of the year in all treatments. This confirms an earlier finding that a correctly-timed, single application of the plant is capable of controlling snails throughout the entire schistosomiasis transmission season in Lower Egypt.
本文描述了对新鲜收获和干燥形式的植物杀螺剂——滨海豚草（Ambrosia maritima）进行的一项对比试验。该植物在埃及亚历山大港附近种植，新鲜成熟植株与干燥成熟植株的重量比为4:1。在5月，以560毫克/升新鲜植株和70毫克/升及140毫克/升干燥植株的剂量水平将植物材料施用于灌溉水道；在6月，以280毫克/升新鲜植株和70毫克/升干燥植株的剂量水平施用。两周后，所有处理中的蜗牛数量均降至低水平。新鲜和干燥材料的杀螺效果之间或其在5月和6月使用时的杀螺效果之间未检测到统计学上的显著差异。种植的植物与从野外采集的植物具有相似的活性顺序。在所有处理中，蜗牛数量的减少一直维持到年底。这证实了早期的一项发现，即适时单次施用该植物能够在下埃及整个血吸虫病传播季节控制蜗牛。
