ABSTRACT The twospotted spider mite (Tetranychus urticae) is a serious pest of strawberries. The objectives of this study were to determine incidence and severity of twospotted spider mite infestations on transplants and the potential for steam to eliminate them. Mites occurred on transplants of Florida cultivars from each of eight North American nurseries from which samples were obtained, but levels were usually low (59% of samples had zero mites). Estimated complete mortality of twospotted spider mite adult females and eggs on leaf discs using steam at 48°C was 2.7 and 1.9 h, respectively; 44°C and 46°C for up to 4 h killed 20% and 60% of the mites, respectively. Based on these results, eliminating twospotted spider mites on transplants is feasible and may be valuable for improving their management in fruit-production fields.

中文翻译：

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草莓 (Fragaria × ananassa) 移植物上的双斑叶螨（Tetranychus urticae），以及蒸汽处理消除它们的潜力

摘要 双斑叶螨（Tetranychus urticae）是草莓的严重害虫。本研究的目的是确定移植物上双斑叶螨感染的发生率和严重程度，以及蒸汽消除它们的潜力。螨发生在从八个北美苗圃中的每一个获得样品的佛罗里达栽培品种的移植物上，但水平通常较低（59% 的样品具有零螨）。在 48°C 下使用蒸汽对叶盘上的双斑叶螨成年雌性和卵的估计完全死亡率分别为 2.7 和 1.9 小时；44°C 和 46°C 长达 4 小时可分别杀死 20% 和 60% 的螨虫。基于这些结果，消除移栽上的双斑叶螨是可行的，并且可能对改善其在水果生产领域的管理具有价值。