Florida Medical Entomology Laboratory, Institute of Food and Agricultural Sciences, University of Florida, Vero Beach, FL, USA.
Entomology and Nematology Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, USA.
Pest Manag Sci. 2023 Sep;79(9):3043-3049. doi: 10.1002/ps.7479. Epub 2023 Apr 6.
Rhipicephalus sanguineus s.l. (Latreille, 1806) can establish indoor populations, which increases the risk of pathogen transmission to humans and companion dogs. Rhipicephalus sanguineus s.l. ticks spend most of their life cycle off the host, which subjects developmental timescale to abiotic factors. Previous studies showed that both temperature and relative humidity (RH) influenced Rhipicephalus sanguineus s.l. survival time across all life stages. However, quantified relationships between environmental factors and Rhipicephalus sanguineus s.l. mortality is not currently available. Here, three Rhipicephalus sanguineus s.l. strains were evaluated for mortality under 20 combinations of five temperatures and four RHs. The data obtained were analyzed to quantify the relationship between environmental factors and Rhipicephalus sanguineus s.l.
Mortality probabilities did not show a consistent pattern between the three tick strains. Temperature, RH, and their interaction influenced Rhipicephalus sanguineus s.l. mortality probabilities across all life stages, with mortality probability generally increasing with temperature but decreasing with RH. With 50% and lower RH, larvae cannot survive for more than 1 week. However, mortality probabilities in all strains and stages were more sensitive to temperature than to RH.
This study identified the predictive relationship between environmental factors and Rhipicephalus sanguineus s.l. survival, which enables estimations of tick survival time under varied residential situations, allows parameterization of population models, and provides guidance for pest control professionals to develop efficient management strategies. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
硬蜱属（Rhipicephalus sanguineus s.l.）可以建立室内种群，这增加了病原体向人类和伴侣犬传播的风险。硬蜱属蜱在宿主外度过其生命周期的大部分时间，这使发育时间尺度受到非生物因素的影响。先前的研究表明，温度和相对湿度（RH）都影响硬蜱属蜱在所有生命阶段的存活时间。然而，目前还没有量化环境因素与硬蜱属蜱死亡率之间关系的研究。在这里，评估了三个硬蜱属蜱株在 20 种五种温度和四种 RH 组合下的死亡率。分析获得的数据以量化环境因素与硬蜱属蜱死亡率之间的关系。
在三个蜱株之间，死亡率概率没有表现出一致的模式。温度、RH 及其相互作用影响了所有生命阶段硬蜱属蜱的死亡率概率，死亡率概率通常随温度升高而增加，但随 RH 降低而降低。RH 低于 50%时，幼虫不能存活超过 1 周。然而，所有菌株和阶段的死亡率概率对温度比 RH 更敏感。
本研究确定了环境因素与硬蜱属蜱生存之间的预测关系，这使得能够估计在不同居住情况下蜱的存活时间，为种群模型的参数化提供了依据，并为害虫防治专业人员提供了指导，以制定有效的管理策略。
