I have posted a picture on the Gallery: http://forums2.gardenweb.com/forums/load/cornucop/gal09225826896.html Looking at the photo, I noticed that the stems are also white. Does it look like Powdery Mildew? Here is a link that might be useful: Photo of the white zucchini leave

I've looked at the underside of these leaves with a 4x loupe and a 30x handheld microscope. I did see some very fine webs and also some light colored/translucent creatures with 6 or so legs...they were moving around but there weren't that many of them, especially considering the number of small white round objects on the underside, and the number of small white markings on the topside. Could these round white objects be mite eggs? I sprayed Safers soap in strong squirts on the undersides of any leaves I could reach. Checking two days later, the undersides looked pretty clean, the small white objects mostly gone, a few unmoving mites. Saw one live mite moving around. I'm not sure if the strong spray or the soap did the job, now I'll see if the leaves recover.

Those are whiteflies laying eggs under your leaves. Whiteflies is my worst enemy, you need to get rid of them quick. They carry a disease called tomato yellow leaf curl virus. Once the plant is infected it may take up to 2 weeks to show symptom and then the plant is permanently stunted, you will not get any reasonable production out of them, even so the fruits won't taste good. My neighborhood was infested with it and it can be hard to get rid until I make changes to whole garden. I had to pull all plants they like to host on, nightshade plants (tomato, pepper, potatoes). They like laying eggs under banana leaves as well. They like warmth, calmness, shade, and humidity. They generally come around during damp weather, so good sun exposure and windy deter them a bit. I tried growing companion plants and they aren't even afraid of them, landing next to the rosemary. I apply cold pressed neem oil (not the cheap neem bought from Home Depot which is not effective) and pepper mint soap under all the leaves of all plants that they like to host on. I pretty much check for all traces of them under leaves and use my garden hose to spray the underside of all the plants. On dry days I also apply diatomaceous earth to the bottom of leaves which makes it harder for them to nest on. It's a constant battle of cleaning up the shades in the garden and routinely spraying to kill the eggs and disrupt their breeding cycle so you can slowly reduce their population. Fortunately they do not like cold so during winter most of them seems to go away. I couldn't grow tomatoes for an entire summer because of them, I make sure to not make the same mistake next summer and concentrate on growing other crops they aren't attracted to.

Well this morning it is open ...again! I have NEVER seen this happen on a violet ever. All my other violets blooms stay open...some get bigger over a few days, then get to a size, and stop. but they never open and close. I am going to watch it again,tonight,and see if it closes again, but now, at 1030am, it is opened again, a tiny bit bigger, more wide and flat. This is VERY odd.