I have had a really good luck using a pump sprayer to keep pollen under control. Just spray the plants that you don’t want to pollinate down and you can spray the males down also to keep pollen from drifting too far but it all depends on what you do with your males. I always separate the males and collect pollen to do paintbrush pollinations. There’s a million ways to do it but I have had the most success using a sprayer to control pollen.