The photos posted by Simon Voorwinde of Brindabella Boquet show rose Downy Mildew rather than blackspot. Dipolcarpon rosae symptoms are rounded black lesions with feathered edges and a yellow halo almost totally confined to the adaxial leaf side. Peronospora sparsa has purplish black, angular lesions with no halo which extend to the abaxial leaf side. Both diseases cause defoliation but the latter is more prevalent in cool moist conditions such as Spring in Tasmania.
Those spots are mostly black spot. There is often downy mildew around too, however; downy mildew is rarely a problem during hot weather and you can see the photos were taken on the 17th of Dec. 2012 at the height of very hot weather with days nudging 40 degrees celcius. Please see http://www.sactorose.org/rosebug/irosediseases.htm as downy rarely causes yellowing. They scorch and fall off.
Black spot resistance has completely broken down this spring/summer (2012) in Tasmania. It has almost completely defoliated. It's flower display in mid-late spring is a disaster as the flowers ball and don't open properly in the cooler weather we get down here ending up looking like soggy Kleenex tissues. Very much a complete let-down and most definately a rose for warmer climates than 41°S. Scheduled for shovel-pruning.
First, do you have a reference we can cite and second, can you provide more detailed information. Several of the of plants you referenced by name are not unique. Baby Love for example; there are two roses named 'Baby Love'. Also, are you sure about 'Flamenca' ?
We made some guesses for now but we need to substantiate them. Thanks !
On second thought, we've removed the parentage until we hear from you with more details and hopefully a reference to cite.
That should do it. We welcome any additional details and/or Mr. Warner's personal comments about any of his roses (ie "Breeder's comments:"). Thanks again.
