discussing weed control on another thread got me to thinking that maybe someone on here can help me. we have a problem with antelope horn milkweed and the only thing we've found to kill it is to spot spray with roundup. obviously this is time consuming & we'd much rather broadcast spray but other herbicides like p+d don't work. we've contacted some of the chemical manufacturers & salesman but no one has been able to give us any good suggestions. do any of you have a problem with these and/or have found anything that works?