Lopez L, Smith H A, Hoy M A, Cave R D
1881 Natural Area Drive, Entomology and Nematology Department, University of Florida, Gainesville, FL 32611, USA
4625 Co Rd 672, Gulf Coast Research and Education Center (GCREC), University of Florida, Wimauma, FL 33598, USA.
J Insect Sci. 2017 Jan 27;17(1). doi: 10.1093/jisesa/iew095. Print 2017 Jan.
Amblyseius swirskiiAthias-Henriot (Acari: Phytoseiidae) is a predatory mite used to control thrips (Thysanoptera), whiteflies (Bemisia tabaci Genn., Hemiptera: Aleyrodidae), and broad mites (BMs) (Polyphagotarsonemus latus Banks, Acari: Tarsonemidae). Dispersal of A. swirskii, using the ornamental pepper "Explosive Ember" as a banker plant was evaluated for control of BMs in high-tunnel peppers. Open-canopy plants (5 weeks old) versus closed-canopy plants (10-weeks old) were used to evaluate the effect of plant connectedness in A. swirskii dispersal, in the presence (two females per plant) and absence of BMs. Plots consisted of a single central banker plant and four bell peppers extending linearly north and south. Sets of all treatments were destructively sampled 1, 4, and 7 days after releasing A. swirskii Within 24 h, A. swirskii dispersed four plants away from the banker plants (1 m), regardless of the state of the canopy. Canopy connectedness did increase the presence of A. swirskii on the crop plants. Predatory mite numbers on closed-canopy treatments doubled within the 7-day sampling period, whereas no significant increase was observed on open-canopy treatments. The presence of BMs had no significant effect on the movement of A. swirskii The results suggest further experiments with A. swirskii and banker plants for control of BMs is warranted.
斯氏钝绥螨（Amblyseius swirskii Athias-Henriot，蜱螨亚纲：植绥螨科）是一种捕食性螨类，用于防治蓟马（缨翅目）、粉虱（烟粉虱，半翅目：粉虱科）和侧多食跗线螨（蜱螨亚纲：跗线螨科）。以观赏辣椒“爆炸余烬”作为替代宿主植物，评估斯氏钝绥螨在控制大棚辣椒侧多食跗线螨方面的扩散情况。使用开放冠层植株（5周龄）与封闭冠层植株（10周龄）来评估植株连通性对斯氏钝绥螨扩散的影响，实验设置有侧多食跗线螨存在（每株植物两只雌螨）和不存在侧多食跗线螨的情况。实验小区由一株位于中央的替代宿主植物和四株沿南北方向呈直线排列的甜椒组成。在释放斯氏钝绥螨后的第1、4和7天，对所有处理组进行破坏性采样。在24小时内，无论冠层状态如何，斯氏钝绥螨都从替代宿主植物扩散到了四株距离之外（1米）的植株上。冠层连通性确实增加了捕食性螨类在作物植株上的出现数量。在7天的采样期内，封闭冠层处理组的捕食性螨数量增加了一倍，而开放冠层处理组未观察到显著增加。侧多食跗线螨的存在对斯氏钝绥螨的移动没有显著影响。结果表明，有必要进一步开展关于斯氏钝绥螨和替代宿主植物防治侧多食跗线螨的实验。
