Tsianplav

a mixture of calcium cyanide and sodium cyanide in the form of a black powder used to fumigate nursery trees, grafts of citrus and other trees, and tea plants against ticks, mites, nematodes, scale insects, and other pests, as well as to fumigate suslik burrows and disinfect flour-milling enterprises. It is extremely toxic and is stored in hermetically sealed iron drums.