compounds 3 2 methyl 3 methoxy 4 methylsulfonyl benzoyl 4 ethylthiobicyclo 3 2 1 3 octen 2 one compound no 3 and 3 2 methyl 3 methoxy 4 methylsulfonyl benzoyl 4 phenylthio bicyclo 3 2 1 3 octen 2 one compound no 4 may be prepared analogously the test compounds are weighed and dissolved in a stock solution consisting of acetone deionized water 1 1 and 0 5 adjuvant mixture dilutions from this stock solution are performed to allow for preparation of spray solutions consisting of single doses applied at a level equivalent to either 4 0 1 0 or 0 25 kg ha of active ingredient the solutions are applied by a linear track sprayer set to deliver 1000 l ha spray volume in pre emergent studies each dose of herbicide is applied as a band treatment over the seed zone pots containing the seeds are then top dressed with soil the plants are grown in the greenhouse and visually evaluated 7 and 19 days after treatment in post emergence studies each dose of compound is applied to the foliage of the selected weed seedling species the plants are allowed to grow in the greenhouse and visually evaluated at 1 7 and 19 days after treatment weed species tested are shown in table 1 herbicidal control is evaluated as injury with 100 injury considered complete control at an application rate of 1 0 kg ha active ingredient the compound nos 1 and 2 exhibited herbicidal control at 80 or greater for various tested weeds in both pre emergence and post emergence screenings it is understood that this example does not reflect all obtained data table 1______________________________________common name genus species______________________________________velvetleaf abutilon theophrastiredroot pigweed amaranthus retroflexusmustard white sinapis.