Get rid of infested plants. Start spraying your younger plants with forbid. Wait four days and spray azamax. Wait three days and spray nuke em. Then spray nuke em every three or four days and no more pm or pests ever again. I usually stop spraying my flowering plants the last three weeks...
Do you have any pics of the affected plant? I had broad mites for quite a time awhile back. The only thing that wiped them out was nuke em. I used forbid,avid,kontos,and everything else you can buy. Trust me when I say to get the nuke em. It works!