Lopez Lorena, Liburd Oscar E
Entomology and Nematology Department, University of Florida/IFAS, 1881 Natural Area Drive, Gainesville, FL 32611, USA.
Insects. 2020 Apr 8;11(4):233. doi: 10.3390/insects11040233.
Reports of severe infestations caused by southern red mites (SRM), McGregor (Acari: Tetranychidae), have increased in recent years in southern highbush blueberries (SHB). Currently, there is little known about the management of tetranychids in SHB, and only two miticides (fenazaquin and fenpyroximate) have recently been labeled for use in SHB. has caused up to 80%-100% losses in some blueberry plantings, and growers are looking for management tools for this new pest of blueberries. We report on injury to SHB from and the performance of seven miticides used to manage SRM populations, including spiromesifen, spiromesifen plus surfactant, vegetable oil concentrate, fenazaquin, "proprietary miticide" (referred to as Pro1), bifenazate, and fenpyroximate. Miticide efficacy was rated based on the number of SRM recorded on collected leaves and plant damage ratings using an arbitrary index (from 0 = no bronzing to 4 = 100% bronzing). Characteristic symptoms of leaf injury included purple or bronzed leaf color, leaf dryness and roughening. Fenpyroximate significantly reduced mite numbers three days after application. Additionally, plants treated with fenpyroximate or fenazaquin showed significantly less bronzing compared with the control plants. Overall, fenpyroximate and fenazaquin showed the best performance for the management of on SHB.
近年来，南方红叶螨（SRM），麦格雷戈（蜱螨亚纲：叶螨科）在南高丛蓝莓（SHB）中造成严重虫害的报告有所增加。目前，对于南高丛蓝莓中叶螨的管理知之甚少，最近仅有两种杀螨剂（喹螨醚和唑螨酯）被标注可用于南高丛蓝莓。在一些蓝莓种植园中，该虫害已导致高达80%-100%的损失，种植者正在寻找针对这种蓝莓新害虫的管理工具。我们报告了南方红叶螨对南高丛蓝莓造成的损害以及用于控制南方红叶螨种群的七种杀螨剂的效果，包括螺虫乙酯、螺虫乙酯加表面活性剂、植物油浓缩液、喹螨醚、“专利杀螨剂”（称为Pro1）、联苯肼酯和唑螨酯。杀螨剂的效果根据收集叶片上记录的南方红叶螨数量以及使用任意指数（从0 = 无青铜色到4 = 100%青铜色）的植株损害评级来评定。叶片损伤的特征症状包括叶片颜色变紫或呈青铜色、叶片干枯和粗糙。唑螨酯在施药三天后显著减少了螨虫数量。此外，与对照植株相比，用唑螨酯或喹螨醚处理的植株青铜色现象明显较少。总体而言，唑螨酯和喹螨醚在管理南高丛蓝莓上的南方红叶螨方面表现最佳。
