once you get a virus it can spread and usually does within 30 seconds to other plants that have nothing protecting them. Unfortunately I was building my outdoor support system for my hydro so could not get out mylar on time or anything else for that matter. I have many with signs of virus and am not pulling them for I am now experimenting with imidicloprid and its known ability to keep whitefly and aphids at bay so this Oct. will be a disease free year for the most part. If I were growing in the ground I would be using loads of worm castings to treat them also for the whitefly hates the taste of a plant that has consumed the castings. I have not done any personal experiments with that but have some good documentation on it. My mylar runs the full course of my cattle panels (2 rows 10 ft. high x 32ft. long) wall on both sides facing each other 6 ft apart so it is a wall of reflection hitting my plants and creating quite a display of reflections.
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