Someone please help me with my cucumbers

I'm losing all my plants and I don't know why. It's very, very frustrating. I've already had to dig up three plants and now the others are suffering from the same strange ailment.

I've tried pesticides, I've tested for wilt disease, I've browsed the internet...I just don't know what else to do. Three plants are in a container like the last ones that died, three others are planted in the ground. The container plants are in full sun, the ground ones are in partial shade. It's been sunny pretty much everyday where I'm at, with temps into the high 90's everyday.

It starts off with yellow dots on the leaves. These then spread and the centers start developing brown spots. Then the brown spots spread until the entire leaf is brown and dies. It usually starts with the leaves closest to the ground and then branches outward, but not every leaf is affected. I can't see any bugs. When I got tomato worms on my tomato and basil plants, I picked them off and sprayed with pesticide. They haven't been back and I sprayed the cukes as well, but the yellowing/browning continues. I water carefully so there aren't droplets on the leaves that could concentrate the sun and burn them. I fertilize with Miracle Grow about once a week. And the cukes are different varieties. The ones that originally got killed off were a bush variety called Spacemaster (I think) and these that are slowly succumbing are a pickling variety. I'm just at the end of my rope with these.

This message was edited Jul 9, 2006 12:30 PM

http://www.ppdl.org/dd/id/anthracnose-cucumber.html

something similar to this?

Sorta. The first picture kinda looks like it except that at that size, most of the spots are still predominantly yellow. Also, while the leaf eventually dies away, the stem isn't affected like it is in the pic. And none of that hairy looking stuff has ever appeared. Once the leaf dies, it looks for all the world to be autumn foliage: brown, dried up, and brittle to the touch.

If it is fungal, then spraying with Ortho Garden Disease Control (aka Daconil) may help... it works on fungal blights on my tomato plants.

This sounds different than the thing my cukes get, which I think is mosaic virus (leaves look wilted, then turn brown & crispy, and any cukes on the vine just wither away)... the only cure I know for that is prevention, by covering plants with row cover until the window of opportunity passes for the insect vector (which I think is that white "cabbage butterfly").