Mini rose leaves yellowing and falling off.
For about a week, now, my rose plant has looked rather sickly. The leaves have started turning yellow at the veins, which then spreads over the whole leaf. Some of the leaves are also turning brown at the tips and curling up. The past two days or so have been particularly bad; at least five entire "branches" (not sure what to call them; leaf clusters?) yellowed all at once and I removed them. Then the next day the same thing happened, and today the trend continues. My plant seems to have stopped making new leaves, and what few baby leaves there were seem to have fallen prey to whatever is ailing my plant.
I've checked the soil; it's slightly moist, but not wet. I don't think it's been over watered or under watered.
I DID have a spider mite problem, recently, but this doesn't seem to be caused by spider mites; I've seen no evidence of mites still being on the plant. I've checked the bottom of the leaves for mites and webs, and found nothing. Instead there is this fine, dark, dust-like material on TOP of the leaves that are yellowing, and some of the leaves turn this grayish color before dying completely and either being removed by me or falling off.
I'm going to assume that it's some sort of mold/fungus problem, but I'm a newbie when it comes to taking care of roses; this is the first one I've had, and I've managed to keep it alive through many foibles of mine as I've learned how to keep a plant alive, since receiving it in December. I've over watered it, under watered it, had fungus gnats, had spider mites, and now this. I had thought that I had a handle on things, for a while; the spider mites had gone and my rose was blooming happily, and then the leaves just started dying off. =(
I have photos for anyone who might be able to help me:
Grayish leaf in center, and grayish spots on one the two top leaves: http://farm6.static.flickr.com/5142/5662819534_8cfd8f5ab8_b.jpg
Dark specks: http://farm6.static.flickr.com/5021/5662249875_fff37aaf99_b.jpg
Photo of the whole plant: http://farm6.static.flickr.com/5061/5662817806_6c48856539_b.jpg