Mike,
I can't be sure, but I have never heard anyone use disease prevention stuff for rooting cuttings, except for a little hydrogen peroxide for the same purpose.
Steve.

Mike, I've been using tebuconazole in the form of Bayer Advanced Disease Control spray this season and haven't had any difficulty rooting cuttings from treated plants.

what's the best place to buy this in a gallon? I see it on nextag for $99 pretty steep considering you need to use 3oz per foot of each bush. Avergage 4-5 foot rose bush = 12-15 ounces of Bayer which means it will only treat 9-10 bushes. The place I work for has approx 60-70 bushes. 25 of them in a raised bed the rest in containers or against trellices.

Elks, sorry, I didn't mean to suggest I use Bayer while trying to root cuttings; only that since I'm using it on bushes and it's a systemic, its going to be in the stem tissues already when I take cuttings. I'm trying to figure out why my rooting success rate has tanked recently; thought that might be a factor.
Rosyone, that's good to hear you're not having that problem with it. I really don't want to have to stop using the Bayer product because it's been so great for disease-prevention/treatment. But I'm scratching my head about the lack of rooting success. I haven't had this problem before this year. I use the zip-loc bag method, root indoors in north-facing windows because of the extreme heat outside during much of the year. I'm using coconut coir for medium just since this summer, but folks on this forum have raved about how great the stuff is, so I don't think that's the problem.

As for where to get the Bayer Disease Control, Lowe's sells it, though they often don't seem to shelve it with the Bayer All-in-One. In stores I've found it in, it was put in a different area. So you might have to ask. I think it is about $15 per 33oz bottle. But don't use so much. It goes farther than the All-in-One product, which is the same active ingredient with added fertilizer and insecticide. I use only 3 tablespoons of the stuff per gallon of water, and no more than a quart of mixed solution per average-sized hybrid tea bush. Much less for small potted minis. With about 40 roses to treat, it lasts about 3-4 application cycles for me.
BTW, the directions on the Disease Control bottle tell you to mix it and spray every 2 weeks. But it's easier and lasts longer used as a soil drench, which only needs to be done every 5 or 6 weeks. Its the same exact stuff as the All-in-One, minus those fertilizer/insecticide components, yet the All-in-One directions are for soil drench, while the Disease Control says to spray. Go figure.

Can you describe how the cuttings began to fail? Did the stems go black? Did fuzzy mildew appear? Were there any symptoms at all?
Steve.

Mike,
I believe it is because you have no taste in the roses you are trying to root (okay, old joke, but still funny to me).

Let me explain what I do in the winter to root cuttings;

Get yourself a dishwashing pan. Place a cutting board (I think 9X11) on the bottom of the pan. I drill holes in the cutting board, but that is just me. Fill the bottom of the pan with water. Place cuttings in the pan and cover with 2 mil clear plastic. I use elastic from a fabric store to keep plastic in place, and tight. Place unfer cheap florescent lighting for 17 hours a day. I use cocnut coir as my rooting medium. Browse around on this sight and you will see pix from George Mander on this. It really is pretty easy.