A Pheromone Trapping Program for the Brown Marmorated Stinkbug (Halyomorpha halys) Begins in Los Angeles County, California Brown marmorated stinkbug (BMSB), Halyomorpha halys (Hemitpera: Pentatomidae), is an invasive insect pest native to China, Japan, Korea, and Taiwan. It was first discovered and officially documented on the east coast of the USA around 1998. This pest...