The cartridges are not mentioned in that article. I saw them on a television program. They so strongly resembled rows of schoolchildren sitting at their desks

The cartridges are not mentioned in that article. I saw them on a television program. They so strongly resembled rows of schoolchildren sitting at their desks, that I half expected a bell to ring before the bees put their textbooks away and go on to learn another scent. The commercial product is the VASOR136 by Inscentinel Ltd. https://www.sheffield.ac.uk/polopoly_fs/1.269373!/file/SnifferBees.pdf https://www.sheffield.ac.uk/polopoly_fs/1.269373!/file/Sniff...