ABSTRACT

It is important in understanding the potential benefits of ultraviolet (UV-C) field applications for control of powdery mildew to know how long the lamps will last before replacement. We conducted a laboratory evaluation of a sample of low-pressure discharge germicidal UV-C lamps that have been used in field trials to control strawberry powdery mildew. None of the lamps tested failed to start after more than a year of operation. The degradation of UV-C output followed trends similar to those described by the manufacturer. Based on these measurement data and on the long history of this lamp technology, we predict that these lamps can continue to perform in the field after the manufacturer’s rated life of approximately 10,000 hours of continuous operation, by reducing the speed of application to deliver the prescribed UV-C dose. With protective sleeves, these low pressure discharge UV-C lamps can be expected to last for many years of service.

摘要

重要的是要了解紫外线 (UV-C) 现场应用对控制白粉病的潜在好处，以了解灯在更换前可以使用多长时间。我们对用于控制草莓白粉病的田间试验的低压放电杀菌 UV-C 灯样品进行了实验室评估。经过一年多的运行，所有测试的灯都没有启动。UV-C 输出的下降趋势与制造商描述的趋势相似。基于这些测量数据和这种灯技术的悠久历史，我们预测这些灯可以在制造商的额定寿命约为 10,000 小时连续运行后继续在现场使用，方法是降低应用速度以提供规定的UV-C 剂量。