Microwave radiation of2450 MHz frequency was used to irradiate sandy loam soil placed in 12 cm high and 10 cm dia columns as a function of exposure times of30, 45, 60, and 120 s. This was done to evaluate the effect of radiation on the highest soil temperature attained and subsequent temperature patterns in relation to time. Soil columns were packed to a field bulk density of approximately 1.4 g/cm3, and treatments consisted of moist soil, dry soil, and layers of moist and dry soil of varying thicknesses. Moisture contents of moist and dry soil were 10% and 2%, respectively, on a dry mass basis. An exposure time of 45 seconds was the most efficient in yielding soil temperatures high enough to kill plant-parasitic nematodes. Irradiation of soil infested with Rotylenchulus reniform nematodes for 45 seconds resulted in a 99% extermination of the organisms in all treatments. However, radiation proved to be most effective in nematode control with 6.0 cm dry soil placed over 6.0 cm moist soil.

中文翻译：

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微波控制土壤中植物寄生线虫的潜力

使用 2450 MHz 频率的微波辐射照射放置在 12 cm 高和 10 cm 直径柱中的沙壤土，作为暴露时间的函数，分别为 30、45、60 和 120 秒。这样做是为了评估辐射对达到的最高土壤温度和随后的温度模式随时间的影响。土壤柱填充到大约 1.4 g/cm3 的田间容重，处理包括潮湿土壤、干燥土壤以及不同厚度的潮湿和干燥土壤层。以干重计，潮湿和干燥土壤的含水量分别为 10% 和 2%。45 秒的暴露时间是产生足够高的土壤温度以杀死植物寄生线虫的最有效时间。在所有处理中，对感染了肾形轮状线虫的土壤进行 45 秒的辐照导致 99% 的生物体被消灭。然而，事实证明辐射对线虫控制最有效，将 6.0 厘米干土放在 6.0 厘米潮湿土壤上。