Tetrahydro-2-(nitromethylene)-2H-1,3-thiazine insect control agents

A method for killing insects which comprises subjecting them to the action of an insecticidally effective amount of a compound selected from the group consisting of:

• 1. a resonance hybrid in which the two significant forms which contribute thereto are represented by the formulae ##STR4## and including when R is hydrogen, the tautomeric form represented by the formula ##STR5## wherein R is hydrogen or contains up to eight carbon atoms and is one of:
• alkyl, alkeny;, alkoxyalkyl, cycloalkylalkyl, cyanoalkyl, haloalkenyl, phenalkyl or alkoxycarbonylvinyl;
• R.sup.1 is hydrogen or contains up to eight carbon atoms and is one of
• a. alkyl, alkenyl, alkynyl, haloalkyl, haloalkenyl, halo (hydroxy)alkyl, alkoxyalkyl, cyanoalkyl, hydroxyalkyl, alkoxycarbonylalkyl, alkylcarbonylalkyl,alkylthioalkyl, alkylsulfinylalkyl, phenalkyl or phenylthio optionally substialkyl, phenyl, alkoxy or phenoxy;
• b. halogen;
• c. aminomethyl, --CH.sub.2 --NR.sup.2 R.sup.3, wherein R.sup.2 is alkyl, hydroxyalkyl, alkoxyalkyl, cycloalkyl, alkenyl, phenyl or phenalkyl, and R.sup.3 is hydrogen or one of the moieties represented by R.sup.2 ;
• d. (CH.sub.2n --R.sup.4, wherein n is zero, one or two, and R.sup.4 is a heteromonocyclic moiety of from five to six atoms in the ring, containing in the ring carbon atoms and one to two of oxygen (--O--), sulfur (--S--) or nitrogen (.dbd.N-- or --NH--) bonded to carbon in the ring;
• and ##STR6##