Compounds and compositions of the formula: ##STR1## where R and R' are both alkyl, C.sub.1 -C.sub.3 ; or R is acyl, C.sub.2 -C.sub.6 and R' is alkyl, C.sub.1 -C.sub.6 or hydrogen; or R is carbalkoxyalkyl, C.sub.2 -C.sub.6 and R' is hydrogen; X is oxygen or sulfur; and; Y and Z are both alkyl, C.sub.1 -C.sub.6 ; are described herein. The compositions exhibit insecticidal and miticidal activity.