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Mycorrizae and trichoderma as BS control
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Posted by taoseeker zone6b? (My Page) on Fri, Oct 16, 09 at 1:51
| I see that there is several interesting products with beneficial micro organisms available in US. You are very lucky that way. I have read a lot about a few of these products. Here I can get hold of something called RootGrow, a type of granulate with mycorizal fungi, and a few products based on trichoderma fungi that are to be applied on soil surface for it to have an action on the leafs as well. There are other products based on different non-pathological fungi and bacteria but they are not available here.
Have any of you here on Gardenweb tried them?
To really test them out I shall have to plant varieties prone to blackspot like Mme Pierre Oger. I have ordered this one for fall planting, and it will arrive any day.
I think the combination of adding mycorrizal fungi to the root, and trichoderma type fungi to the soil and leafs should be a good combination. One important thing to remember is that when these are used there must be no spraying with any kind of fungicide, conventional or biological like neem.
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Follow-Up Postings:
RE: Mycorrizae and trichoderma as BS control
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| In addition to the prohibitions regarding fungicides when these products are used, consideration also has to be given to the negative effects of certain fertilizers -- especially on mycorrhizae. High levels of phosphorus can negate the benefits of the fungi. Some literature on the subject advises that only organic fertilizers, or chemical fertilizers having VERY low levels of phosphorus, be used on areas where the fungi have been applied to the soil. Peat moss as a soil amendment is also discouraged (depending on the source of the peat), as is fresh compost (which generally is rich in phosphorus). Well-aged compost, however, does not appear to inhibit the fungi. I'm not familiar with trichoderma. In response to a lot of mycorrhizae fungi hype in the U.S. several years ago, I gave serious consideration to using it in some new rose beds I was developing at the time. I abandoned the fungi idea because of the added complications relative to fertilization and disease control. It's been quite a while since I investigated this matter, so pehaps there have been new research findings that make my comments hopelessly dated. Your post is the first mention I've seen regarding the use of these fungi as a BS control. Is it the trichoderma specifically that is thought to control BS? |
RE: Mycorrizae and trichoderma as BS control
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| I use mychorrhizae with every rose I plant in my 3-year old garden. In fact, with everything except azaleas which I read do not benefit from it. I also read about the phosphorous conflict, specifically bone meal, so I have generally not used any phosphorus at planting. I've wondered if this lack has adversely effected my roses. More recently I sprinkled a little bone meal in the bottom of the pot when potting on bands. Then real recently I read that phosphorous/bone meal should be placed in the hole in one to three handfuls - little piles - rather than spread around the hole, and this is the way I'm doing it now. Phosphorus doesn't move so maybe this would prevent interference with most of the fungi. Don't know anything about trichoderma. I grow mostly OGRs - Teas, Chinas and Noisettes - and some roses that are supposed to be BS resistant. I did notice that this year inspite of heavy Florida summer rains I did not see any general outbreaks of BS like I did the previous summer when there was less rain. I was pretty surprised. Could that be the effect of the mycorrhizae? I don't use fungicides and have even resisted the temptation to spray "one or two" roses that are more susceptible because of the detrimental effect on soil fungi. Thank you for confirming that practice for me. BTW, the brand I use is "Rooter's". Sherry |
RE: Mycorrizae and trichoderma as BS control
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| I didn't know about mycorhizzae and bonemeal. I some times use that, and I might have counter acted this stuff on some of my fall planting this year. There are a few products with a lot of work and research behind them, and they mostly targeted black spot. Unlike the mycorhizzae, trichoderma is present in good compost and lives on soil and plant surfaces too. The theory is that when lots of trichoderma is present, it outconcers blackspot fugus. Specific strains of trichoderma seams to trigger plants own imune system for it to be fully up-and-going when conditions for the patogenic microbes are more favorable. I have a box of something called BINAB, and is a sort of granulate that are applied on soil surface near the rose. I think tere are several brands.
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RE: Mycorrizae and trichoderma as BS control
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| Hi - Google has info re. BINAB, it seems to be made for fence posts, telephone poles, etc. to control rot. Has anyone used it for roses ? and what were the results, over a period of time ? thanks, sally |
RE: Mycorrizae and trichoderma as BS control
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| It seems to me that it's important to create some healthy, living, rich soil. The fungi tend to do that. If one adds chemicals to a balanced healthy living soil, it is going to upset the balance. Robert |
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