ABSTRACT Lygus spp. are major pests of the California strawberry industry and have prompted growers to purchase and use machines called “bug vacuums” to mitigate damage throughout the production season. The aim of this work was to design, develop and evaluate a vacuum to mechanically remove and eliminate Lygus spp. from California strawberry fields at higher rates than existing vacuum systems. Field tests of the prototype vacuum were conducted in Guadalupe, California on raised strawberry beds with fully developed canopies. Results indicated that the prototype vacuum significantly increased removal of Lygus spp. compared with a conventional vacuum. The average number of Lygus spp. removed on each pass by the prototype vacuum was 2.2 times greater than that of the conventional vacuum. The use of cylindrical ducts and two fans per bed increased airflow and resultant Lygus spp. removal. The elimination baffle located at the outlet of the conventional vacuum was observed to significantly reduce air speed and raising it 30.2 cm above the outlet increased air speed by 17% (3.0 m/s) at the vacuum inlet. A validation study of a computational fluid dynamics model suggested that simulations could serve as a useful tool for bug vacuum design.

中文翻译：

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原型 Lygus Spp。真空为加利福尼亚草莓提供改进的害虫管理

摘要 Lygus spp。是加州草莓产业的主要害虫，促使种植者购买和使用称为“吸尘器”的机器，以减轻整个生产季节的损害。这项工作的目的是设计、开发和评估真空以机械去除和消除莱格斯。来自加利福尼亚草莓田的费率高于现有的真空系统。原型真空的现场测试在加利福尼亚州瓜达卢佩进行，在带有完全开发的檐篷的凸起草莓床上进行。结果表明，原型真空显着增加了对 Lygus spp 的去除。与传统真空相比。Lygus spp 的平均数量。原型真空每次通过的去除率是传统真空的 2.2 倍。每张床使用圆柱形管道和两个风扇增加了气流和由此产生的 Lygus spp。移动。观察到位于常规真空出口处的消除挡板显着降低了空气速度，并将其提高到出口上方 30.2 cm，真空入口处的空气速度增加了 17% (3.0 m/s)。对计算流体动力学模型的验证研究表明，模拟可以作为 bug 真空设计的有用工具。