 In 2013, Syngenta launched CLARIVA™ pn, which has the active ingredient of "Pasteuria nishizawae" to combat the soybean cyst nematode.The effectiveness of "Pasteuria" as a biocontrol may depend on the biotypes of the nematode host that are present since they can vary in their susceptibility to "Pasteuria".Currently, four species of "Pasteuria" and two candidate species are described, all of which are obligate parasites with specific hosts.