I-Symphytroph, ekwaziwa ngokuba yi-pymphothion, sisitshabalalisi se-organophosphorus esingeyonkqubo esisebenza kakhulu ngokuchasene nezinambuzane ze-dipteran. Ikwasetyenziselwa ukulawula i-ectoparasites kwaye ineempembelelo ezibalulekileyo kwiimpukane zesikhumba. Iyasebenza ebantwini nakwimfuyo. Ityhefu kakhulu. Inokunciphisa umsebenzi we-cholinesterase kwigazi elipheleleyo, ebangela intloko, isiyezi, ukucaphuka, isicaphucaphu, ukugabha, ukubila, i-salivation, i-miosis, i-convulsions, i-dyspnea, i-cyanosis. Kwiimeko ezinzima, zihlala zihamba kunye ne-pulmonary edema kunye ne-cerebral edema, engakhokelela ekufeni. Ekuhlulekeni kokuphefumla.