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#1
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Paph Leaf Problem
Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank |
#2
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Frank,
I really cannot be of any help other than to say that while that probably isn't "natural," it sure is common. I used to see it fairly frequently, and other than being bothersome, it really doesn't seem to affect flowering or putting out new growths. I haven't seen that in a while on my paphs, but I cannot say why that might be. I do grow them all in semi-hydroponics, so maybe it's the fact that they get a more-or-less constant food and water supply is part of the question, but I also have been more diligent about the use of disinfectants and neem oil as a preventive measure. I doubt that it's nutritional, as that usually expresses itself either by chlorosis or by leaf tip browning. At what concentration do you feed and how often? I suppose it could be bacterial or fungal in nature, or insect damage, but the fact that it affects all of your plants suggests that it's not bugs. -- Ray Barkalow - First Rays Orchids - www.firstrays.com Plants, Supplies, Books, Artwork, and Lots of Free Info! .. "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank |
#3
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Frank,
I really cannot be of any help other than to say that while that probably isn't "natural," it sure is common. I used to see it fairly frequently, and other than being bothersome, it really doesn't seem to affect flowering or putting out new growths. I haven't seen that in a while on my paphs, but I cannot say why that might be. I do grow them all in semi-hydroponics, so maybe it's the fact that they get a more-or-less constant food and water supply is part of the question, but I also have been more diligent about the use of disinfectants and neem oil as a preventive measure. I doubt that it's nutritional, as that usually expresses itself either by chlorosis or by leaf tip browning. At what concentration do you feed and how often? I suppose it could be bacterial or fungal in nature, or insect damage, but the fact that it affects all of your plants suggests that it's not bugs. -- Ray Barkalow - First Rays Orchids - www.firstrays.com Plants, Supplies, Books, Artwork, and Lots of Free Info! .. "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank |
#4
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You don't mention if the browning area is firm or soft. How rapid does the
spot spread? Have you tried any treatments, physiological or chemical besides cutting off the spot? You say it's on various leaves. Are they usually the bottom ones? Do the same plants get spots again in the same areas (lower, medium or new leaves)? Have any of your plants died from this? It certainly does not appear to be "natural" meaning normal. And I doubt it's nutritional or more leavs would be affected on each plant. It certainly looks like it could be fungal or bacterial. I also resembles sunburn if a drop or two of water or fertilizer was on the leaf and got some sun coming in the window. But I'd go with the former especially if the brown is soft and waterlogged. Try cutting off the affected area and soaking the cut end in Physan for 10-15 min and then treating with sulfur or cinnamon. I had a St Swithin that lost several leaves to Erwinia (Brown rot) and I'm sure would have died. In desperation, I knocked the plant out of the pot, shook off all the medium, and soaked the whole plant in Physan for 20 min. I still have that plant today and it's big and beautiful. Good Luck Gary "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank |
#5
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You don't mention if the browning area is firm or soft. How rapid does the
spot spread? Have you tried any treatments, physiological or chemical besides cutting off the spot? You say it's on various leaves. Are they usually the bottom ones? Do the same plants get spots again in the same areas (lower, medium or new leaves)? Have any of your plants died from this? It certainly does not appear to be "natural" meaning normal. And I doubt it's nutritional or more leavs would be affected on each plant. It certainly looks like it could be fungal or bacterial. I also resembles sunburn if a drop or two of water or fertilizer was on the leaf and got some sun coming in the window. But I'd go with the former especially if the brown is soft and waterlogged. Try cutting off the affected area and soaking the cut end in Physan for 10-15 min and then treating with sulfur or cinnamon. I had a St Swithin that lost several leaves to Erwinia (Brown rot) and I'm sure would have died. In desperation, I knocked the plant out of the pot, shook off all the medium, and soaked the whole plant in Physan for 20 min. I still have that plant today and it's big and beautiful. Good Luck Gary "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank |
#6
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You don't mention if the browning area is firm or soft. How rapid does the
spot spread? Have you tried any treatments, physiological or chemical besides cutting off the spot? You say it's on various leaves. Are they usually the bottom ones? Do the same plants get spots again in the same areas (lower, medium or new leaves)? Have any of your plants died from this? It certainly does not appear to be "natural" meaning normal. And I doubt it's nutritional or more leavs would be affected on each plant. It certainly looks like it could be fungal or bacterial. I also resembles sunburn if a drop or two of water or fertilizer was on the leaf and got some sun coming in the window. But I'd go with the former especially if the brown is soft and waterlogged. Try cutting off the affected area and soaking the cut end in Physan for 10-15 min and then treating with sulfur or cinnamon. I had a St Swithin that lost several leaves to Erwinia (Brown rot) and I'm sure would have died. In desperation, I knocked the plant out of the pot, shook off all the medium, and soaked the whole plant in Physan for 20 min. I still have that plant today and it's big and beautiful. Good Luck Gary "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank |
#7
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Ray, thanks for the feedback. I feed them with a 1/4 strength solution four times as often as the instructions advise (so they get a weaker dose, but more often). I agree with you, I don't believe it is bugs. The plants are indoors in a clean area, and I have never spotted of the usual pests. At this point, I am leaning towards believing that the cause is some kind of infection, mainly for lack of any other idea... Thanks again, Frank "Ray" wrote in message ... Frank, I really cannot be of any help other than to say that while that probably isn't "natural," it sure is common. I used to see it fairly frequently, and other than being bothersome, it really doesn't seem to affect flowering or putting out new growths. I haven't seen that in a while on my paphs, but I cannot say why that might be. I do grow them all in semi-hydroponics, so maybe it's the fact that they get a more-or-less constant food and water supply is part of the question, but I also have been more diligent about the use of disinfectants and neem oil as a preventive measure. I doubt that it's nutritional, as that usually expresses itself either by chlorosis or by leaf tip browning. At what concentration do you feed and how often? I suppose it could be bacterial or fungal in nature, or insect damage, but the fact that it affects all of your plants suggests that it's not bugs. -- Ray Barkalow - First Rays Orchids - www.firstrays.com Plants, Supplies, Books, Artwork, and Lots of Free Info! . "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank |
#8
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Good questions Gary, The browning area is firm (kind of leathery). The spot will spread rapidly, you can see a change everyday. No, I have not tried any treatment yet. I will probably try a fungicide real soon, but I have been hesitant, because (being indoors) the humidity level is not high (about 50%) and I really have not experienced any other types of fungus problems (even the coconut husk is not moldy). It seems to hit the leaves at random. Sometimes it gets the lower leaves, but not always. I have had a few seedlings die from this, mostly because they are so small. I agree with you, I am beginning to believe that it is an infection (probably a fungus, because of the lack of "mushiness"). Thanks, Frank "V_coerulea" wrote in message ... You don't mention if the browning area is firm or soft. How rapid does the spot spread? Have you tried any treatments, physiological or chemical besides cutting off the spot? You say it's on various leaves. Are they usually the bottom ones? Do the same plants get spots again in the same areas (lower, medium or new leaves)? Have any of your plants died from this? It certainly does not appear to be "natural" meaning normal. And I doubt it's nutritional or more leavs would be affected on each plant. It certainly looks like it could be fungal or bacterial. I also resembles sunburn if a drop or two of water or fertilizer was on the leaf and got some sun coming in the window. But I'd go with the former especially if the brown is soft and waterlogged. Try cutting off the affected area and soaking the cut end in Physan for 10-15 min and then treating with sulfur or cinnamon. I had a St Swithin that lost several leaves to Erwinia (Brown rot) and I'm sure would have died. In desperation, I knocked the plant out of the pot, shook off all the medium, and soaked the whole plant in Physan for 20 min. I still have that plant today and it's big and beautiful. Good Luck Gary "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank |
#9
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Good questions Gary, The browning area is firm (kind of leathery). The spot will spread rapidly, you can see a change everyday. No, I have not tried any treatment yet. I will probably try a fungicide real soon, but I have been hesitant, because (being indoors) the humidity level is not high (about 50%) and I really have not experienced any other types of fungus problems (even the coconut husk is not moldy). It seems to hit the leaves at random. Sometimes it gets the lower leaves, but not always. I have had a few seedlings die from this, mostly because they are so small. I agree with you, I am beginning to believe that it is an infection (probably a fungus, because of the lack of "mushiness"). Thanks, Frank "V_coerulea" wrote in message ... You don't mention if the browning area is firm or soft. How rapid does the spot spread? Have you tried any treatments, physiological or chemical besides cutting off the spot? You say it's on various leaves. Are they usually the bottom ones? Do the same plants get spots again in the same areas (lower, medium or new leaves)? Have any of your plants died from this? It certainly does not appear to be "natural" meaning normal. And I doubt it's nutritional or more leavs would be affected on each plant. It certainly looks like it could be fungal or bacterial. I also resembles sunburn if a drop or two of water or fertilizer was on the leaf and got some sun coming in the window. But I'd go with the former especially if the brown is soft and waterlogged. Try cutting off the affected area and soaking the cut end in Physan for 10-15 min and then treating with sulfur or cinnamon. I had a St Swithin that lost several leaves to Erwinia (Brown rot) and I'm sure would have died. In desperation, I knocked the plant out of the pot, shook off all the medium, and soaked the whole plant in Physan for 20 min. I still have that plant today and it's big and beautiful. Good Luck Gary "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank |
#10
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I can't tell exactly what the problem is -- some kind of fungus. My best
suggestions a 1) Cut with a bigger margin into healthy tissue next time. 2) Coat the cut edge with cinnamon, or a stronger fungicide paste, immediately after cutting. -- Kenni Judd Juno Beach Orchids http://www.jborchids.com "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank |
#11
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I can't tell exactly what the problem is -- some kind of fungus. My best
suggestions a 1) Cut with a bigger margin into healthy tissue next time. 2) Coat the cut edge with cinnamon, or a stronger fungicide paste, immediately after cutting. -- Kenni Judd Juno Beach Orchids http://www.jborchids.com "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank |
#12
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On Sun, 15 Aug 2004 17:09:37 GMT, V_coerulea wrote:
You don't mention if the browning area is firm or soft. How rapid does the spot spread? Have you tried any treatments, physiological or chemical besides cutting off the spot? You say it's on various leaves. Are they usually the bottom ones? Do the same plants get spots again in the same areas (lower, medium or new leaves)? Have any of your plants died from this? It certainly does not appear to be "natural" meaning normal. And I doubt it's nutritional or more leavs would be affected on each plant. It certainly looks like it could be fungal or bacterial. I also resembles sunburn if a drop or two of water or fertilizer was on the leaf and got some sun coming in the window. But I'd go with the former especially if the brown is soft and waterlogged. Try cutting off the affected area and soaking the cut end in Physan for 10-15 min and then treating with sulfur or cinnamon. I had a St Swithin that lost several leaves to Erwinia (Brown rot) and I'm sure would have died. In desperation, I knocked the plant out of the pot, shook off all the medium, and soaked the whole plant in Physan for 20 min. I still have that plant today and it's big and beautiful. Good Luck Gary "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank Thanks for the info Gary, I just noticed the same problem with my St. Swithin.(still in bloom) A rapid browning, a whole leaf in a day!!! Have it unpotted & soaking in Physan as we speak. Cheers Wendy |
#13
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On Sun, 15 Aug 2004 17:09:37 GMT, V_coerulea wrote:
You don't mention if the browning area is firm or soft. How rapid does the spot spread? Have you tried any treatments, physiological or chemical besides cutting off the spot? You say it's on various leaves. Are they usually the bottom ones? Do the same plants get spots again in the same areas (lower, medium or new leaves)? Have any of your plants died from this? It certainly does not appear to be "natural" meaning normal. And I doubt it's nutritional or more leavs would be affected on each plant. It certainly looks like it could be fungal or bacterial. I also resembles sunburn if a drop or two of water or fertilizer was on the leaf and got some sun coming in the window. But I'd go with the former especially if the brown is soft and waterlogged. Try cutting off the affected area and soaking the cut end in Physan for 10-15 min and then treating with sulfur or cinnamon. I had a St Swithin that lost several leaves to Erwinia (Brown rot) and I'm sure would have died. In desperation, I knocked the plant out of the pot, shook off all the medium, and soaked the whole plant in Physan for 20 min. I still have that plant today and it's big and beautiful. Good Luck Gary "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank Thanks for the info Gary, I just noticed the same problem with my St. Swithin.(still in bloom) A rapid browning, a whole leaf in a day!!! Have it unpotted & soaking in Physan as we speak. Cheers Wendy |
#14
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"Wendy" wrote in message .. . On Sun, 15 Aug 2004 17:09:37 GMT, V_coerulea wrote: You don't mention if the browning area is firm or soft. How rapid does the spot spread? Have you tried any treatments, physiological or chemical besides cutting off the spot? You say it's on various leaves. Are they usually the bottom ones? Do the same plants get spots again in the same areas (lower, medium or new leaves)? Have any of your plants died from this? It certainly does not appear to be "natural" meaning normal. And I doubt it's nutritional or more leavs would be affected on each plant. It certainly looks like it could be fungal or bacterial. I also resembles sunburn if a drop or two of water or fertilizer was on the leaf and got some sun coming in the window. But I'd go with the former especially if the brown is soft and waterlogged. Try cutting off the affected area and soaking the cut end in Physan for 10-15 min and then treating with sulfur or cinnamon. I had a St Swithin that lost several leaves to Erwinia (Brown rot) and I'm sure would have died. In desperation, I knocked the plant out of the pot, shook off all the medium, and soaked the whole plant in Physan for 20 min. I still have that plant today and it's big and beautiful. Good Luck Gary "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank Thanks for the info Gary, I just noticed the same problem with my St. Swithin.(still in bloom) A rapid browning, a whole leaf in a day!!! Have it unpotted & soaking in Physan as we speak. Cheers Wendy Wow! A whole leaf in a day! I'd definaately guess brown rot which can become systemic. I don't know how long it takes or what conditions are necessary for the systemic mode of infection. But once it happens, supposedly the plant is a goner. I don't know if a Physan soak can cure that or not. Old Physan instructions say it can which is why I tried it originally but I can't swear that my St Swithin was infected systemically by erwinia spp since I didn't have anything tested. I do know it worked and I still have the plant in a healthy condition. Good luck with yours. Gary |
#15
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"Wendy" wrote in message .. . On Sun, 15 Aug 2004 17:09:37 GMT, V_coerulea wrote: You don't mention if the browning area is firm or soft. How rapid does the spot spread? Have you tried any treatments, physiological or chemical besides cutting off the spot? You say it's on various leaves. Are they usually the bottom ones? Do the same plants get spots again in the same areas (lower, medium or new leaves)? Have any of your plants died from this? It certainly does not appear to be "natural" meaning normal. And I doubt it's nutritional or more leavs would be affected on each plant. It certainly looks like it could be fungal or bacterial. I also resembles sunburn if a drop or two of water or fertilizer was on the leaf and got some sun coming in the window. But I'd go with the former especially if the brown is soft and waterlogged. Try cutting off the affected area and soaking the cut end in Physan for 10-15 min and then treating with sulfur or cinnamon. I had a St Swithin that lost several leaves to Erwinia (Brown rot) and I'm sure would have died. In desperation, I knocked the plant out of the pot, shook off all the medium, and soaked the whole plant in Physan for 20 min. I still have that plant today and it's big and beautiful. Good Luck Gary "Frank Rittwager" wrote in message ... Can anyone take a guess at what this leaf problem is? I have numerous Paphs of several kinds (species, primaries, and novelties), and they all seem to get this type of spot on various leaves on a regular basis. When I cut off the end of the leaf, the problem seems to stop spreading for a couple of months, and then the leaf starts to die (becomes dark brown) again (starting at the end of the leaf). Is this just natural? http://216.160.131.65/LeafSpot1.jpg http://216.160.131.65/LeafSpot2.jpg Environmental Details: Grown In: Medium Sized Coconut Husk Plant Food: "Grow More" Urea Free 20-10-20 Watering Schedule: Every 4-5 days Temperatu ~75 degrees F. Lights: Natural and 4 Foot Cool-Warm Bulb (Mixed) Please let me know if I can supply any more details or additional photos... Thanks for any information or opinions!!!! Frank Thanks for the info Gary, I just noticed the same problem with my St. Swithin.(still in bloom) A rapid browning, a whole leaf in a day!!! Have it unpotted & soaking in Physan as we speak. Cheers Wendy Wow! A whole leaf in a day! I'd definaately guess brown rot which can become systemic. I don't know how long it takes or what conditions are necessary for the systemic mode of infection. But once it happens, supposedly the plant is a goner. I don't know if a Physan soak can cure that or not. Old Physan instructions say it can which is why I tried it originally but I can't swear that my St Swithin was infected systemically by erwinia spp since I didn't have anything tested. I do know it worked and I still have the plant in a healthy condition. Good luck with yours. Gary |
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