The spore-forming insect pathogen,Bacillus popilliaeDutky, has been used on the E seaboard since the early 1940's to control the Japanese beetle,Popillia japonicaNewman. The sole producer of this bacterial product is the Fairfax Biological Laboratory at Clinton Corners, NY. The product is manufactured under the trade name “Japanese beetle DOOM”. DOOM contains 100 million spores ofBacillus popilliae/g. When it is used to treat a pasture, 2 g are applied/intersection of a 10 or 20-ft grid. Thus the beetles, as they contract the disease and move away from the original point of deposit, gradually spread viable spores throughout the pasture, until complete and permanent protection is afforded.