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Moisture Stress Effects on Survival of Infective Trichostrongylus colubriformis Larvae

By J. M. Schmidt, K. S. Todd and N. D. Levine


Water was evaporated from infective Trichostrongylus colubriformis larvae suspended in tap, distilled, and triple-distilled water, and the nematodes were then exposed to 50% and 70% relative humidity (RH) at 20 and 30 C. Sample groups were rehydrated for 4 h daily in similar quality water, observed for motility and counted, then returned to the same RH and temp and re-desiccated. Desiccation and rehydration were repeated until all motility ceased. Longest survival was 30 days at 20 C and 70% RH. In all temp and RH combinations, control (nondesiccated) and desiccated larvae survived longer in distilled or triple-distilled water than in tap water

Topics: Article
Publisher: Society of Nematologists
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Provided by: PubMed Central
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