peper50 - 2012-08-06, 13:35 Temat postu: Communis'y i nagoć. Witam serdecznie, Na wstępie przepraszam za objętość tematu. Chciałbym się jednak dowiedzieć czegoś więcej o nagoci (Gymnosporangium). Przeglądając tematy na forum zauważyłem, że większość porad odnośnie tego grzyba była jednoznaczna ze spaleniem rośliny, niektórzy próbowali też usuwać chore gałęzie. Na IBC znalazłem temat sprzed 2 lat i rozmowa dotyczyła Communis’ów i właśnie o nie mi chodzi. Jeden z rozmówców uważa, że 80% jałowców żyjących w ich naturalnym środowisku posiada tego grzyba. Co ciekawsze radzą sobie one z nim, czego nie można powiedzieć o Communis’ach już pozyskanych (yamadori). Po przeczytaniu wypowiedzi można zauważyć, że jedni hamują rozprzestrzenianie się grzyba środkami grzybobójczymi a inny tracą gałęzie w swoich roślinach. Grzyb ten z rodziny rdzowatych jest na tyle dokuczliwy, że wiele osób rezygnuje z pozyskiwania Communis’ów ze względu na zbyt duże ryzyko zejścia rośliny. Czytając wypowiedzi poniższych osób sprawa wygląda bardzo poważnie ale przyznam się, że nigdy nie miałem z tym grzybem do czynienia ani nie zauważyłem, żeby właściciele Communis’ów narzekali na niego w większym gronie. Chciałbym się dowiedzieć czy z nogacią u Communis’ów faktycznie jest tak źle? Mieliście jakieś doświadczenia z tą chorobą grzybową i czy komuś się udało z tym wygrać? Poniżej wybrane wypowiedzi z tematu na IBC, żeby nie trzeba było czytać wszystkich wypowiedzi nie związanych z tematem debaty. Źródło. Zapraszam wszystkich cierpliwych, ciekawych i posiadających jakąś wiedzę na temat do rozmowy. Pozdrawiam. “Pavel Slovak: About ten years ago, we gathered all three trees and two years of gradually died as a result of unknown fungal disease.” “Ian Young: … The fungal disease you refer to is a big problem. I read somewhere that 80% of Common Junipers in the wild have it! They seem to cope with it in the wild but not after collection. It has a habit of killing important branches!! ...” ”Ian Young: ThanYou can see the signs of the fungal infection on the trunk and branches. It tends to swell the area and has a dappled look to it. Not easy to see at times, but it's there. The fungus usually appears/flowers with gusto in Feb/March time, usually after a heavy shower of rain. Literally overnight the tree sprouts an orange gel type fungus. It can swell a lot and sometimes can split the cambium. I keep meaning to photograph it. I have a few in the garden but the cold snap this year seems to have delayed the fungus flowering this year. …I've tried a few treatments but this type of 'rust' seems to survive deep in the wood. 'Bonsai from the Wild' By A.N. Lenz has a brilliant piece about this rust and even though it's American based it sounds identical to our European one. He states that the only way to get rid is to burn the tree!” “Ian Young: The great weather we are having seems to be holding it back this year. No doubt in the next heavy rain shower it will explode! As you can see it runs along he branch as opposed to around it, that said it can overwhelm smaller branches causing their demise.” “Paul Landis: The rust Mr. Lenz refers to is Cedar Apple Rust. It is quite prevalent here in the eastern US. It is a rust that requires 2 types of trees to complete its life cycle. The galls (the orange ones) turn into globby gel like flowers after a rain and when they dry again explode sending out their spores. This stage is seen in Junipers which host the galls. The most common ones are Eastern Red cedar(Juniperus Virginiana) and Juniperus Communis although the galls can be found on any type of juniper. The second stage is the rust that forms on the leaves of infected apples, crabapples, quince etc. as a result of the spores. Although a serious infection can weaken a tree, Cedar apple rust is generally not a life threatening condition for either tree. That being said--I'm not running an orchard, in which case I'm sure this fungus would be far more troubling to me!” “Ian Young: … today we had a thunder storm and I decided to check on the juniper as this is usually when the fungus expands. As expected it had grown considerably during the storm and will probably expand further over night. I sprayed with a fungicide but this particular type can lie deep in heartwood and prove stubborn to shift.” “Ian Young: I have collected Common Juniper here over the years. I collected this one about 10 years ago. It grows well except for the fungus issues. I have sprayed it with just about everything on the market! Some years it seems to work and things look great, then out of the blue it's back. I think it survives deep in the heartwood and is therefore always going to be there. It is after all what makes the great deadwood in nature. Some absolute stunning ones where I used to collect. I haven't bothered collecting them for years now, too painful to see them die after maybe 6 or 7 years work. Even if they don't die they will throw branches due to the swelling and bursting of the cambium by the fungus. This is somewhat annoying if its an important branch! You can find some without the fungus but I would say that 80% in the wild have it. I would only every collect one again if it was a stunner and showed no signs of infection.” “Peter Adams: I collected several common junipers which developed the dreaded orange ‘jelly babies’ very quickly once humidity built up. They were treated by wire brushing the growths off whenever they appeared, combined with a fungicidal spray given very three weeks or so. Copper based fungicide was one I used. The fungus tried to come back a couple of times but the treatment seemed to cure it after a month or so.” |
||||||
