Herbicidal oxatricyclic ethers

A compound and stereoisomers of the following formula ##STR19## wherein m is 1,

• R.sup.1 is straight chain C.sub.1 -C.sub.3 alkyl;
• R.sup.2 is H,
• R.sup.3 and R.sup.4 are H,
• R.sup.5 and R.sup.6 are H,
• Q is CH.sub.2 W or ##STR20## q and r are independently 0, 1 or 2;
• R.sup.7 is H, halogen, C.sub.1 -C.sub.3 alkyl, OR.sup.8, SR.sup.8 or CN;
• R.sup.8 is C.sub.1 -C.sub.3 alkyl or C.sub.1 -C.sub.3 haloalkyl;
• Z is CH.sub.2, NR.sup.9, O, S or may be CH and taken to form a double bond with an adjacent carbon;
• R.sup.9 is H or C.sub.1 -C.sub.3 alkyl;
• W is phenyl optionally substituted with 1-3 substituents selected from halogen, C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.3 alkoxy, OH, CN, C.sub.1 -C.sub.3 haloalkyl, C.sub.1 -C.sub.3 haloalkoxy, C.sub.1 -C.sub.3 alkylthio, C.sub.2 -C.sub.4 alkenyl and C.sub.2 -C.sub.4 alkynyl;
• or W is selected from the group consisting of tetrahydropyran, furan, tetrahydrofuran, thiophene and pyridine, said heterocyclic ring optionally substituted with 1-2 substituents selected from the group consisting of halogen, CH.sub.3 and OCH.sub.3 ;
• provided that
• 1) the sum of q and r is 0-2;
• and
• 2if the sum of q and r is 0 then Z is CH.sub.2.