Asymmetric O,S-dialkyl dithiophosphoric acid esters of 1,2,3-benzotriazin-4-ones
 Benztriazinonylmethyl-organophosphoric esters of the formula ##EQU1## wherein R.sub.1 represents ethyl, propyl, isopropyl, n-butyl, i-butyl or sec. butyl and R.sub.2 represents methyl or ethyl, R.sub.3 represents hydrogen or methyl, a process for their manufacture and their use in pest control. 
Ciba-Geigy AG
A C
A01N C07F
inventional inventional
Alexis A. Paul L.
Oswald Valint