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Dying Canes and Fungicide
One of the non HT roses affected does get a lot of shade. The other non-HT, Belinda's Dream is so very thick and full, even growing alone it can't possibly get good air circulation. I think I'll go back to using Dithane as my primary fungicide and see what happens. Of course our temps stay in the upper 80's now so I should notice a decrease anyway. All that I have read on this disease calls for fairly dramatic action. The author of that page called for abandoning the spray schedule and essentially a slash and burn technique. From my sisters experience with her grapevine (she lost everything) this not a disease like PM or Blackspot that can be tolerated. It MUST be erradicated. Quickly. The disease once inside the plant will continue to kill it, roots & all. Climate has little influence at that point. -- Theo in Zone 5 Kansas City Maybe you're right again, Theo. Maybe... Unfortunately so. |
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