The active ingredient in this a naturally occurring Soil Bacteria (Bacillus Thuringiesis subspecies kurstaki), that controls many types of larvae including cabbage loopers and imported cabbage worms. Best when applied to emerging or small larvae. This 8 oz. concentrate container will make up to 16 Gallons of spray. May be applied up to the day of harvest.   As with all pesticides read and follow all current label directions for application, handling and disposal.  Fert-lome brand.