Terahertz imaging: a diagnostic technology for prevention of grass seed infestation

Abstract

One of the most significant problems the Australian sheep and lamb industry faces today is grass seed infestation (GSI), which occurs when seeds accumulate in the sheep's fleece and penetrate the skin, causing infection. Meat & Livestock Australia estimates that the yearly losses caused due to GSI are around AUD$47.5 M (in Australia alone). Here, we demonstrate that terahertz spectroscopy and imaging can be utilized for early detection of GSI. This is possible because terahertz waves can penetrate through sheep wool and have the appropriate wavelength for identifying the seed. Moreover, terahertz waves have non-invasive and non-ionizing properties and are ideal for non-contact and standoff detection. This work demonstrates that terahertz waves can be utilized for the early detection of seeds in the animal fleece or on the pelt as a precursor tool for the prevention of GSI.