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microfungus
Here is the link to Steve's pictures and it works. (All praise the
internet!) It is hard to read the archived post but it looked like some people, including Pat and Aaron (two people who from my point of view tend to know what they are talking about)thought some of the pictures looked like what they called microfungus. (To me one looks like mite damage, but not all of them. Taken together, the group of pictures looks like a lot of different problems to me.) Okay group, from top to bottom, refresh my memory....which pictures look like microfungus? http://www.geocities.com/tlswilso/Phal_problems.html "Diana Kulaga" wrote in message ... It was indeed Steve, and I think he lost some plants that he had owned for many years. I don't know if he ever found a cure. I had never seen anything like what he posted. Diana "al" wrote in message news:HanNg.10072$OI1.7228@trnddc05... Cool. What do these two books say are the symptoms to look out for? Does Bob Gordon say if the term "microfungus" refers to a specific pathogen or group/subgroup of fungus pathogens? It is such a funky word. I am not saying it does not exist as a pathogen to be dealt with... Steve posted links to pictures and the thread you are referring to is mentioned among the threads that come up in the search I mentioned. I don't know if the pictures can still be accessed. I also scanned the links and read some of the symptoms describe when the term was used and they didn't sound like what Van described, of course this means nothing except I didn't see any common buzzword symptoms in the verbal descriptions. I do remember thinking Steve's pictures looked like a mite infection to me, but that's a memory. I didn't try to access the picture link he posted. I also noticed about 3 or 4 over the counter fungicide names that were mentioned as being a cure or treatment in these links. And what you listed used over a 6 month treatment period would cure just about any fungus nature could throw at an orchid plant. "Pat Brennan" wrote in message ... The best and only write up on the topic that I know of are in BobGordon's books "Culture of the Phalaenopsis Orchid" and '"Phal Cultu A Worldwide Survey." The pages on cure are well worn in my books. Two of the three required fungicides are not sold in home consumer sizes. If you do not already have Subdue, that will set you back over 200 bucks. I have bought Triadimefon (Bayleton) as Strike 50% WDG (under $100). If I was a hobby grower and it showed up I would try Daconil (consumer size available around $20) and (and not or!) Cleary 3336 (around $50, but a good chemical to have if you have a greenhouse.) treatments for six improvements. If I saw no improvements after 6 months I would toss the plants. Do not assume the plant is cured until you get clean leaves for a year without chemical treatments. A few years back someone in this group posted very good examples of what I call microfungus. I do not think he ever cured it. Based on what I have read in this group it sounds like it can spread to Oncs and maybe other orchids. Pat "al" wrote in message news:BOkNg.3297$xh3.3254@trnddc01... if you go to Google groups at http://groups.google.com/group/rec.gardens.orchids/ and search the archive of this newsgroup for the term "microfungus" you will find threads in which the term has been mentioned as far back as 1995. I don't think anything conclusive has ever been posted about it and I tend to think of it as a kind of 'internet' lore, because I have not been able to find anything written about it anyplace else. I have even asked a few agriculture extension agents I know... None of my text books on botany or pest management mention it, but they all talk a lot about fungus problems. And most fungus diseases that infect living plant tissue are microscopic so the term is somewhat confusing and misleading to begin with and probably applied a bit loosely when nothing else seems to apply... Whenever this term comes up I wait to see if somebody can post something definative. "van" wrote in message oups.com... I was talking with an orchid grower today who warned me about a problem that orchid growers seem to be having, but don't know much about it or what to do. It is called a microfungus and once it sets in it eventually kills the orchid. It spreads very easily throughout a greenhouse or collection and affects phrags, paphs, phals, and other things. Small brown or orange lesions appear mostly on the undersides of leaves and discoloration eventually spreads killing the leaf or entire new growth or eventually the plant. Healthy established plants may have the microfungus symptoms but still grow and bloom. Apparently not much is known about this and there is no known cure. Phyton 27 may help control it but it never seems to go away. One West Coast commercial greenhouse operation apparently lost an entire greenhouse orchid collection to what was attributed to this mysterious "microfungus." Anyone know more about this "microfungus?" Thanks |