Why an English Manor Is Deploying Parasitic Wasps and Moth Pheromones Conservators are trying to protect historic treasures—but it’s all more subdued than it sounds. Why an English Manor Is Deploying Parasitic Wasps and Moth Pheromones Copy Link In eastern England, Blickling Hall and its historic treasures are under attack. National Trust/Chris Lacey In This Story Battle wasps, to war! At least that’s the way it sounded when conservators in England recently announced that they were going to deploy an army of wasps to fight a moth infestation at a stately manor home. But alas, the reality is less an epic battle and more like a quirky rom-com (with a little parasitism thrown in).