Abstract
This paper records attempts to overcome the problems of using a powerful but non-ovicidal molluscicide (N-tritylmorpholine) in eradicating snails from a dam by treating the water twice in 14 days. The first treatment was aimed at the existing snail population and the second at snails hatched from eggs that survived the first application. At each treatment an over-all concentration of 0.25 ppm was applied by spraying a 16% emulsifiable concentrate of N-tritylmorpholine from shore and boat to the water surface. The snails, Biomphalaria pfeifferi and Lymnaea natalensis, were first seen again 8 weeks from the start of the application in the region of 2 inlet furrows. When pretreatment levels of snails were again reached, a second double treatment was applied, again at an over-all concentration of 0.25 ppm but using a 50% paste formulation applied over 3 days for 3 hours per day to the inlet furrows. The snail kill was again 100% as measured by the sampling technique used but again young snails appeared 9 weeks later. The author concludes that single treatments at 5-week intervals probably represent the best means of control with N-tritylmorpholine.
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Selected References
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- Boyce C. B., Crossland N. O., Shiff C. J. A new molluscicide, N-tritylmorpholine. Nature. 1966 Jun 11;210(5041):1140–1141. doi: 10.1038/2101140a0. [DOI] [PubMed] [Google Scholar]
- CROSSLAND N. O. A mud-sampling technique for the study of the ecology of aquatic snails, and its use in the evaluation of the efficacy of molluscicides in field trials. Bull World Health Organ. 1962;27:125–133. [PMC free article] [PubMed] [Google Scholar]
- Crossland N. O. Field trials to evaluate the effectiveness of the molluscicide N-tritylmorpholine in irrigation systems. Bull World Health Organ. 1967;37(1):23–42. [PMC free article] [PubMed] [Google Scholar]
- Paulini E., Camey T. Experiencias de laboratório e de campo com o moluscicida experimental SHELL WL 8008. Rev Bras Malariol Doencas Trop. 1964 Oct-Dec;16(4):493–498. [PubMed] [Google Scholar]
- WEBBE G., STURROCK R. F. LABORATORY TESTS OF SOME NEW MOLLUSCICIDES IN TANGANYIKA. Ann Trop Med Parasitol. 1964 Jun;58:234–239. doi: 10.1080/00034983.1964.11720807. [DOI] [PubMed] [Google Scholar]