[pyr)azin(yl in the systemic name, < pyr- (in pyro-comb. form) + -az- (in azo-comb. form) + -insuffix1 + -ylsuffix] an insecticide and nematocide, (C2H5O)2·PS·O·C4N2H3.
ΚΠ
1964 B.S.I. News Mar. 23Thionazin.
1974 Martin & WorthingPesticide Man. (Brit. Crop Protection Council) (ed. 4) 488Thionazin is a soil insecticide and nematicide effective against..nematodes,..root maggots and..aphids.