So your cucumber plants are all covered with white powder, and they're starting to shrivel. What to do? You could go to the bookstore and stock up with a few hundred bucks' worth of gardening books that probably won't help anyway. Or you could spend hours on the Internet, typing "zucchini+white+powder+shrivel" into Google and hoping for the best. Or you could call the Kansas City Master Gardener Hotline and get the perfect answer in minutes. Every day from spring to fall, experienced local gardeners are waiting by the phone, ready to help. It doesn't cost a thing, and you can call as often as you like.