Department of Entomology and Nematology, University of Florida, Gainesville, FL 32611, USA.
J Econ Entomol. 2012 Apr;105(2):480-9. doi: 10.1603/ec11265.
In Florida, southern highbush (SHB) blueberries (Vaccinium corymbosum L. x Vaccinium darrowi Camp) are grown for a highly profitable early season fresh market. Flower thrips are the key pest of SHB blueberries, and Frankliniella bispinosa (Morgan) is the most common species found. Flower thrips injure blueberry flowers by feeding and ovipositing in all developing tissues. These injuries can lead to scarring of developing fruit. The objectives of this study were to determine the relationship between thrips and yield in different SHB blueberry cultivars and to determine an action threshold. Experiments were conducted during early spring 2007 and 2008 on four farms; a research farm in Citra, FL; and three commercial farms, two in Hernando Co., FL., and one in Lake Co., FL. At the Citra farm, 'Emerald', 'Jewel', 'Millennia', and 'Star' blueberries were compared in 2007, and all but Star were compared in 2008. On the Hernando and Lake Co. farms, two treatment thresholds (100 and 200 thrips per trap) and an untreated control and four cultivars (Emerald, Jewel, Millennia, and 'Windsor') were compared. Emerald consistently had more thrips per trap and per flower than the other cultivars on all four farms. However, this did not always lead to an increase in fruit injury. Thrips numbers exceeded the threshold on only one farm in 2007, and there was a significantly lower proportion of injured and malformed fruit in the 100 thrips per trap threshold treatment compared with the control on this farm.
在佛罗里达州，南方高丛蓝莓（Vaccinium corymbosum L. x Vaccinium darrowi Camp）因其高利润的早期新鲜市场而被广泛种植。蓟马是蓝莓的主要害虫，其中双斑恩蚜小蜂（Frankliniella bispinosa (Morgan)）最为常见。蓟马通过在所有发育组织中取食和产卵来伤害蓝莓花朵。这些伤害会导致正在发育的果实出现疤痕。本研究的目的是确定不同南方高丛蓝莓品种中蓟马与产量的关系，并确定一个防治指标。试验于 2007 年和 2008 年早春在四个农场进行；位于 Citra，FL 的一个研究农场；以及 Hernando Co.，FL 的两个和 Lake Co.，FL 的一个商业农场。在 Citra 农场，2007 年比较了‘Emerald’、‘Jewel’、‘Millennia’和‘Star’蓝莓，2008 年仅比较了除‘Star’之外的其他品种。在 Hernando 和 Lake Co. 农场，比较了两个处理阈值（100 和 200 头蓟马/诱捕器）和一个未处理对照以及四个品种（Emerald、Jewel、Millennia 和‘Windsor’）。 Emerald 蓝莓在所有四个农场的每个诱捕器和每朵花中的蓟马数量都明显多于其他品种。然而，这并不总是导致果实受伤增加。2007 年只有一个农场的蓟马数量超过了阈值，并且在这个农场的 100 头蓟马/诱捕器阈值处理中，受伤和畸形果实的比例明显低于对照。
