Javier A. Ceja-Navarro et al. suggest a novel means of controlling the coffee berry borer (Hypothenemus hampei), as summarized by The Economist. The authors provide evidence that one of the species of bacteria that reside in the beetle’s digestive system, Pseudomonas fulva, detoxifies the caffeine that the coffee plant produces as a natural herbivore deterrent. Knock out the bacterium, perhaps with a targeted bacteriophage, and you knock out the pest.