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| How long does it take the bayer to start working? all of my roses have blackspot. I've only sprayed this one time and I hope this will start working. |
Follow-Up Postings:
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| Once the leaves show the blackspots, those spots will never go away. You are spraying to prevent a further outbreak and to help the new growth resist infection. You will have to continue your spray program. Now that you already see symptoms, I would spray once a week for 2 - 3 weeks, then move to a 10 - 14 day schedule. Good luck. |
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- Posted by ken-n.ga.mts (My Page) on Mon, Apr 16, 12 at 17:40
| Any foliage that is infected will eventually show up. Like Diane_nj said, you are spraying to prevent any healthy foliage from getting BS. Once you start spraying after black spot is present you have to stick to a good preventive program. |
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| I agree, the leaves that are already infected will still yellow and fall off. And there may be leaves that do not show any spots yet that are already infected. Those may still spot and die too. So don't be surprised if it looks like the spray hasn't done any good. What it's doing is protection any leaves that are not already infected from being infected. Keep spraying on a regular basis and when the new foliage comes in it will remain clean. |
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| What everyone else said. I had a bs outbreak earlier this spring. I sprayed two weeks in a row, then 2 weeks after that. No more BS. |
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| Actually the Bayer ingredient tebuconazole kills the fungal body inside the leaf. With very recent infections (new, small spots or no spots visible yet), the leaf will survive. Older infections will have damaged the leaf irreparably, and it will die. See research by Emma Gachomo online. I don't find it necessary to start with 7-day intervals, or maybe twice at most.. Spraying at 14-day intervals will check the spread of disease. This fungicide is much more effective than older kinds. |
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- Posted by barbarag_happy 8a SE VA (My Page) on Wed, Apr 18, 12 at 11:50
| Even here in the humid coastal lowlands! every 10 to 14 days is enough even for BS magnets like Golden Celebration, Ebbtide, or Night Owl. Next year start spraying before BS appears. Most years I only spray about 3 times in spring season. Then I resume spraying about 4 weeks before the fall flush. I've never had any foliage damage from Bayers but I would never spray more often than label instructions. I hate to spray at all but Golden Celebration & Ebbtide are must-haves for me so I spray. |
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| May I ask if this is the correct bayer fungicide that everyone seems to recommend? Thanks, Maude |
Here is a link that might be useful: http://www.amazon.com/Bayer-Disease-Control-Roses-Flowers/dp/B000NCUW6 M/ref=sr_1_4?ie=UTF8&qid=1334971078&sr=8-4
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- Posted by mike_rivers z5 MI (My Page) on Fri, Apr 20, 12 at 21:47
| Maude, the full name is "Bayer Advanced Disease Control for Roses, Flowerws and Shrubs". The clincher is to read the label and see: Tebuconazole, 2.9%, other ingredients, 97.1%. |
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| That's it, Maude. Go for it! Remember, only spray on calm days. No wind. Early morning is good, but sometimes late afternoon, the winds will all calm down for about an hour before sundown. Morning is better, however, since the leaves have plenty of time to dry off then. You'll need to buy a portable hand-pump sprayer. I got mine at Home Depot for less than $20, if I remember correctly. You will also need to put a couple drops of dishwash soap (like Dawn) in the mixture--for the stick-em quality. And wear clothing covering your legs and arms. Plan on shedding them immediately afterwards and dumping them, plus your tennis shoes in the washingmachine and yourself in the shower. No wind--very important! Kate |
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| Thanks so much for the info. Kate, I had no idea this stuff was so toxic. I don't want to create another chernobyl in my yard but I did put in quite a few hybrid teas this year. If I start to sprout another head I will be going back to african violets...lol.. Thanks all:) Maude |
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| "I had no idea this stuff was so toxic." It's not, but we regular sprayers recommend PPE (Personal Protective Equipment) at all times. Actually, the old Funginex and Daconil were more toxic and they were used since the 60's, at least - maybe earlier than that. 'Azoles, which constitute the primary ingredient in the Bayer, Banner Maxx, and Honor Guard fungicides, is used in a dandruff shampoo that can be bought at your local Kroger or Walmart - it's called Nizoral: |
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| P.S. You don't need the dishwashing liquid if you use the Bayer - it has a spreader/sticker (surfactant) built-in. If you buy the BannerMaxx or Honor Guard from Rosemania, then you need it or something like Indicate 5. Those products are only needed if you have a ton of roses and go through 5-10 gallons of spray at a time. |
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- Posted by henry_kuska z5 OH (kuska@neo.rr.com) on Sat, Apr 21, 12 at 10:46
| The word "toxic" can be misleading. Something can kill humans immediately. Of course that is "toxic". But something can affect your (or your children's) quality of life 20 or 30 years down the road "potential for endocrine disrupting effects" and "unreasonable adverse effects". See below. ----------------------------------------- The European Union has banned tebuconazole as of 2018. http://digitaljournal.com/article/265134 Apparently the reason for the ban is: "Due to the potential for endocrine disrupting effects, tebuconazole was assessed by the Swedish Chemicals Agency [3] as being potentially removed from the market by EU regulation 1107/2009.[4]" http://en.wikipedia.org/wiki/Tebuconazole
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Here is a link that might be useful: one commercial adv with NY restriction
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| Shampoo and conditioner - Nizoral - available on the open market: Walgreens Kroger Walmart Ketoconazole is the ingredient in Nizoral. Its differences are insignificant with propiconazole (Banner Maxx) or tebuconazole (Bayer). It's also taken orally as an anti-fungal agent in the form of pills. In the over-the-counter shampoo, its concentration is 1%. As Mike Rivers notes above, the -azole concentration in Bayer Advanced is 2.9%. That's before mixing at a rate of 3/4oz per gallon! Is that going to cause us any more harm in spraying our roses than using a shampoo? About the only known serious interaction is taking the pill form of an -azole with V*agra, C*alis, or L*vitra. (I couldn't post those names without the asterisks.) IMHO, we need to get over the hysteria of using chemicals in our rose gardens, as if using other concoctions is "natural." |
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| I once read the NYS report on the Bayer Fungicide. They tested the equivilent of 100 gallons of spray mixture A DAY. Then they revised to to 30 gallons A DAY. I use the Bayer every two weeks for 6 months. that's 12 times. I use about 4 gallons each time. That's 48 gallons A YEAR. And I have over 100 roses. I'd worry more about the junk we eat than the minimal exposure from something that is also sold as a shampoo. |
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- Posted by mike_rivers z5 MI (My Page) on Sat, Apr 21, 12 at 13:46
| Tebuconazole is not sold as a shampoo. Nor is it possible to state with even the tiniest degree of confidence that the toxicity or lack of toxicity of ketoconazole has any bearing on the toxicity or lack of toxicity of tebuconazole. |
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- Posted by henry_kuska z5 OH (kuska@neo.rr.com) on Sat, Apr 21, 12 at 14:35
| An example that 2 compounds can have the same active group but different chemical, health properties. Methanol and ethanol both contain the OH active group. the rest is carbon and hydrogen. Does anyone suggest that because we can drink ethanol that we can drink methanol? |
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| "IMHO, we need to get over the hysteria of using chemicals in our rose gardens, as if using other concoctions is "natural."" Water is a chemical and if you ingest too much of it it will kill you. |
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| WOW Henry! And here, we all think of CA as being restrictive of chemicals. Nice! Thank you for the info! Jeri |
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