My Plan Worked Perfectly
Three years ago I started disbudding my whole garden as soon as I saw curculio damage to the buds. Prior to the first year of disbudding, my garden was so infested that not even one bloom of the first flush opened undamaged.
When Baldo visited my garden when it was young, he told me that I would never have a decent flush of roses due to the combination of the curculios and the summer heat. There are no known predators for curculios. Hand picking or contact sprays don't work because the bugs work from first light to last light and I don't.
This year I had a magnificent first flush ! Unfortunately, my camera died and I can't post photos. Most of the roses gave me a full flush and were simply glorious. The roses that would have opened later were full of buds that were just about to pop, but the curculios arrived before they had a chance to put on their show.
By removing all of the buds and blooms throughout the curculio season, I found that the dang bugs migrated out of the garden because they had no food and no place to lay their eggs. They do migrate back into the garden if I don't disbud through their active period above ground.
I'll disbud for about 6 weeks and the curculios will not breed in the garden. (Their season usually ends around the end of June.) I know this sounds drastic, but it's actually good for both the garden and the roses.
Roses have a mandate to bloom and the disbudded roses start pushing buds and growth beyond what we normally expect from our plants and when I do let them bloom, the second flush is actually fuller and more prolific than the first flush of roses.
Also, the plants are healthier in that they put a lot of their energy into plant growth and increased foliage to support all of the buds they are pushing. I have found this also makes them more heat tolerant, so that second flush is totally awesome.
I can and do have a real rose garden in spite of the bugs and the heat !
My plan is working.