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A couple of weeks ago I called your show mentioning my thrip problem on some of the roses last summer. You suggested I use the Bayer Advanced drench early this spring to prevent the trip from returning. I plan to do that very soon. Thank you very much.
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Proper nutrition will also help your roses fight disease and stay healthy so be sure to fertilize them according to Andre's recommendations for yearly fertilizer applications (found at the bottom of the page): http://www.inthegardenradio.com/v.php?pg=47
The Bayer Advanced All-In-One Rose and Flower Care that Andre suggested you use for thrips, will also help control the black spot on your roses. This product is a drench that is three systemic products in one. It controls a variety of insects, diseases (including black spot), and also includes a fertilizer. Bayer Advanced also makes a product, Disease Control for Roses, Flowers, and Shrubs, that can be sprayed on the roses during the growing season. This product is listed for use on black spot on roses and is available in a concentrate. Remember: Always read and follow the label directions when using any pesticide!