[shelleybean]

The instructions say to place the cards every seven feet, or something like that. Even on plants where the cards were hung, I still sometimes got TSWV. Both my blue and yellow cards caught a lot of bugs, including one ladybug and lots of houseflies. Most of what I see on there is tiny little black bugs with wings, but I don't know for sure what they are. I wish mosquitos would get stuck to those things! So combined with the weather and my quicker response to the disease, I can't say whether the cards really helped or not. In 2006 with an unusually mild winter, and no bug cards, I lost three quarters of my plants to the virus, as opposed to one quarter this year. That's all I know.