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Fern with a disease??
Hi, I have two ferns in large containers that I inherited with my house a few years ago. I'm sure that they are Dryopteris, and look possibly like Filix-Max from comparing them with photos.
From coming up over the last 3 months, one of them has i) developed a black growth on the underside of the fronds ii) collapsed in structure, so that all the fronds are lying compltely down. I have always kept them moist, so its not lack of water. Is this somethign that I can treat, shoudl I cut it back and leave it for this year, or should I pull it out completely for fear of contamination with other plants? N.b. it is in an individual container so there's no danger of transmission through the soil |
#2
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Fern with a disease??
'Jono',
http://www.ppath.cas.psu.edu/EXTENSI...EASE/fern.html Regards, Emrys Davies. "jono" wrote in message s.com... Hi, I have two ferns in large containers that I inherited with my house a few years ago. I'm sure that they are Dryopteris, and look possibly like Filix-Max from comparing them with photos. From coming up over the last 3 months, one of them has i) developed a black growth on the underside of the fronds ii) collapsed in structure, so that all the fronds are lying compltely down. I have always kept them moist, so its not lack of water. Is this somethign that I can treat, shoudl I cut it back and leave it for this year, or should I pull it out completely for fear of contamination with other plants? N.b. it is in an individual container so there's no danger of transmission through the soil -- jono Jono ---------------------------------------------------------------------- -- posted via www.GardenBanter.co.uk |
#3
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Fern with a disease??
Xref: kermit uk.rec.gardening:241133
"Emrys Davies" wrote in message ... 'Jono', http://www.ppath.cas.psu.edu/EXTENSI...EASE/fern.html Regards, Emrys Davies. "jono" wrote in message s.com... Hi, I have two ferns in large containers that I inherited with my house a few years ago. I'm sure that they are Dryopteris, and look possibly like Filix-Max from comparing them with photos. From coming up over the last 3 months, one of them has i) developed a black growth on the underside of the fronds ii) collapsed in structure, so that all the fronds are lying compltely down. I have always kept them moist, so its not lack of water. Is this somethign that I can treat, shoudl I cut it back and leave it for this year, or should I pull it out completely for fear of contamination with other plants? N.b. it is in an individual container so there's no danger of transmission through the soil -- jono Jono ---------------------------------------------------------------------- -- posted via www.GardenBanter.co.uk ------------------ The underside discolouration is most likely their masses of sporangia. These produce spores that grow into a totally different plant~ the 'prothallus' which is capable of producing gametes that will grow into a new fern. The diploid fern alternates with the haploid prothallus. 'Alternation of Generations'. These sporangia are very obvious on the underside of the pinnae of D. filix-mas. The spores are microscopic. Collapsed, mature, fronds is/are quite normal. You should be able to see immature fronds forming in the centre with their diagnostic 'crook' shape. Keep very moist and shaded. Best Wishes Brian. |
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