Researchers in the US have come up with a cheap, environmentally friendly way to kill termites and other pests. The method involves the applying a sugar derivative, which inhibits an anti-microbial protein normally secreted by the insects, thereby leaving them open to disease.Insects have efficient immune systems, although much of their workings are still unknown. Nevertheless, one aspect that is well-understood is the existence of proteins called pattern-recognition receptors, which can spot microbes that should not be present. Such receptors come under a class of 'gram-negative bacteria binding proteins', or GNBPs.Ram Sasisekharan of the Massachusetts Institute of Technology, together with colleagues...