最近,美国工程师Webb发明了一种新型植物检疫仪。利用它能在几秒钟内检测出种子(植物)内的害虫。其结构与医生的听诊器类似,由听诊器头、传导装置和声音放大设备三部分组成。植检员只要将听诊器头贴近受检种子(果实),就能在声音放大器端听到害虫咀嚼或移动所发出的声音。这种仪器的灵敏度很高,能在一夸脱(1.137升)的果仁中检出一颗带虫的果仁。对于单只橘果,能检 Recently, American engineer Webb invented a new type of phytosanitary device. Use it to detect pests within seeds (plants) in seconds. Its structure is similar to a doctor’s stethoscope, and consists of a stethoscope head, a conduction device and a sound amplification device. As soon as the inspector hides the stethoscope head against the examined seed (fruit), it can hear the pest chewing or moving the sound on the sound amplifier side. The sensitivity of this instrument is high enough to detect a bug with nuts in a quart (1.137 l) of kernel. For a single orange, can seized