The way I isolate peppers for seed saving is using mesh fabric barrier. Most common species of peppers can easily self pollinate, but they can also be cross pollinated by other types in the same garden. When a pepper flower is fertilized with pollen from different type of pepper, the resulting pod will look typical of the parent plant. The seeds however will be crossed, containing dna from both parents. Plants grown from those seeds will show characteristics of both parents. Sometimes this is desirable when intentional crossing is the goal. When you are wanting to save pure seed, that is true to the parent, you have to prevent cross pollination for other different plants as much as possible. Barrier isolation, such as netting, prevents pollinating insects like bees, from transferring pollen from other plants to your target plant. This method helps especially when you have several different types of peppers clustered together, which is how mine are usually.

Last year I made netting out of tulle fabric I bought from Wal-mart. I don't have any means to sew the fabric, so I hot-glued the sides together. It worked but but was a lot of effort and very time-intensive. This year I'm trying 5-gallon paint strainers. I got this tip from Tony Sherwood, creator of the Carbonero. He gave me a second tip of securing the bag in way that is not so tight.

I found a pack of 24 bags from for around 25.00. Considering it's around a 1.00/bag the time savings is worth it. Other people use mosquito netting which works very well too. Assuming you support it properly, this is great for covering larger areas. For instance, you could easily cover entire plants, or beds even.

Here's a link to the bags I purchased on that are shown in the video. (Full disclosure, these are links, but are shown in, and are relevant to the video. Also, bought the bags from myself.) http://amzn.to/2aS0ALo

Also, here's the twist tie I use for securing the bags to the branches. I bought one of these rolls last year, and have barely put a dent in it. I bought mine from Lowes, but those in the link are same exact thing and same cost.
http://amzn.to/2abXP5X

Later in the video I show how to easily tag the peppers that were self-pollinated using drinking straws.