School of Biosciences, University of Birmingham, Edgbaston, B15 2TT, UK.
Exp Appl Acarol. 2013 Apr;59(4):435-45. doi: 10.1007/s10493-012-9619-9. Epub 2012 Sep 26.
The lower and upper thermal activity thresholds of the predatory mite Phytoseiulus macropilis Banks (Acari: Phytoseiidae) were compared with those of its prey Tetranychus urticae Koch (Acari: Tetranychidae) and one of the alternative commercially available control agents for T. urticae, Phytoseiulus persimilis Athias-Henriot. Adult female P. macropilis retained ambulatory function (CTmin) and movement of appendages (chill coma) at significantly lower temperatures (8.2 and 0.4 °C, respectively) than that of P. persimilis (11.1 and 3.3 °C) and T. urticae (10.6 and 10.3 °C). As the temperature was raised, P. macropilis ceased walking (CTmax) and entered heat coma (42.7 and 43.6 °C), beyond the upper locomotory limits of P. persimilis (40.0 and 41.1 °C), but before T. urticae (47.3 and 48.7 °C). Walking speeds were investigated and P. persimilis was found to have significantly faster ambulation than P. macropilis and T. urticae across a range of temperatures. The lower thermal activity threshold data indicate that P. macropilis will make an effective biological control agent in temperate climates.
捕食性螨虫植绥螨（Phytoseiulus macropilis Banks）（蜱螨目：植绥螨科）的下限和上限热活动阈值与它的猎物二斑叶螨（Tetranychus urticae Koch）（蜱螨目：叶螨科）和另一种二斑叶螨商业上可利用的替代控制剂巴氏新小绥螨（Phytoseiulus persimilis Athias-Henriot）进行了比较。成年雌性植绥螨在明显更低的温度下（分别为 8.2°C 和 0.4°C）保持步行功能（CTmin）和附肢运动（冷昏迷），而巴氏新小绥螨的相应温度为 11.1°C 和 3.3°C，二斑叶螨的相应温度为 10.6°C 和 10.3°C。随着温度的升高，植绥螨停止行走（CTmax）并进入热昏迷（42.7°C 和 43.6°C），超过了巴氏新小绥螨的上行动限（40.0°C 和 41.1°C），但在二斑叶螨的上行动限（47.3°C 和 48.7°C）之前。对行走速度进行了研究，发现巴氏新小绥螨的行走速度明显快于植绥螨和二斑叶螨。下限热活动阈值数据表明，植绥螨将成为温带气候中有效的生物防治剂。
