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#1
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Hi,
I am having a great deal of difficulty in tracking down a problem with my Bay Tree. We originally had two Bay Trees, the first one died last year with this problem and now it's spread to the other one. These are the symptoms: a. Sticky Leaves b. Leaves go from normal green, to a light green and finally to a dried up golden brown and fall off. c. Occassionally the leaves go black at the tips I have inspected all the leaves and there is no signs of any insects big or small. There is also no sign of any "soot". Please help! Thanks. |
#2
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In message m,
peter123 writes Hi, I am having a great deal of difficulty in tracking down a problem with my Bay Tree. We originally had two Bay Trees, the first one died last year with this problem and now it's spread to the other one. These are the symptoms: a. Sticky Leaves b. Leaves go from normal green, to a light green and finally to a dried up golden brown and fall off. c. Occassionally the leaves go black at the tips I have inspected all the leaves and there is no signs of any insects big or small. There is also no sign of any "soot". Please help! Peter, this sounds very much like scale insect (not sure if that's their proper name)to me. They are tiny creatures that are hard to spot because they are flat and look like flaky bits. It happened to my grapefruit tree a few years ago. Take a magnifying glass to the undersides of the leaves at the main vein that runs beneath the leaf. If you see brown flat bits there, you may have scale. I found it almost impossible to eradicate them, and finally had to dump the tree altogether, and I'd grown it from seed. It was 10 years old. -- Chris Boulby National Collection of Diascias Please note new email address: |
#3
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In message m,
peter123 writes Hi, I am having a great deal of difficulty in tracking down a problem with my Bay Tree. We originally had two Bay Trees, the first one died last year with this problem and now it's spread to the other one. These are the symptoms: a. Sticky Leaves b. Leaves go from normal green, to a light green and finally to a dried up golden brown and fall off. c. Occassionally the leaves go black at the tips I have inspected all the leaves and there is no signs of any insects big or small. There is also no sign of any "soot". Please help! Peter, this sounds very much like scale insect (not sure if that's their proper name)to me. They are tiny creatures that are hard to spot because they are flat and look like flaky bits. It happened to my grapefruit tree a few years ago. Take a magnifying glass to the undersides of the leaves at the main vein that runs beneath the leaf. If you see brown flat bits there, you may have scale. I found it almost impossible to eradicate them, and finally had to dump the tree altogether, and I'd grown it from seed. It was 10 years old. -- Chris Boulby National Collection of Diascias Please note new email address: |
#4
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In message m,
peter123 writes Hi, I am having a great deal of difficulty in tracking down a problem with my Bay Tree. We originally had two Bay Trees, the first one died last year with this problem and now it's spread to the other one. These are the symptoms: a. Sticky Leaves b. Leaves go from normal green, to a light green and finally to a dried up golden brown and fall off. c. Occassionally the leaves go black at the tips I have inspected all the leaves and there is no signs of any insects big or small. There is also no sign of any "soot". Please help! Peter, this sounds very much like scale insect (not sure if that's their proper name)to me. They are tiny creatures that are hard to spot because they are flat and look like flaky bits. It happened to my grapefruit tree a few years ago. Take a magnifying glass to the undersides of the leaves at the main vein that runs beneath the leaf. If you see brown flat bits there, you may have scale. I found it almost impossible to eradicate them, and finally had to dump the tree altogether, and I'd grown it from seed. It was 10 years old. -- Chris Boulby National Collection of Diascias Please note new email address: |
#5
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In article ,
Chris Boulby wrote: Peter, this sounds very much like scale insect (not sure if that's their proper name)to me. They are tiny creatures that are hard to spot because they are flat and look like flaky bits. It happened to my grapefruit tree a few years ago. Take a magnifying glass to the undersides of the leaves at the main vein that runs beneath the leaf. If you see brown flat bits there, you may have scale. I found it almost impossible to eradicate them, and finally had to dump the tree altogether, and I'd grown it from seed. It was 10 years old. Yes. That's their name, all right, and there are several that can infest bay. I have got rid of them from bay and citrus on SMALL plants, by scraping off or damaging every scale with a blunt knife or similar. 2-3 goes and they have gone. But that does mean going over EVERY stem and EVERY leaf, which could be time consuming on a larger plant .... Regards, Nick Maclaren. |
#6
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In article ,
Chris Boulby wrote: Peter, this sounds very much like scale insect (not sure if that's their proper name)to me. They are tiny creatures that are hard to spot because they are flat and look like flaky bits. It happened to my grapefruit tree a few years ago. Take a magnifying glass to the undersides of the leaves at the main vein that runs beneath the leaf. If you see brown flat bits there, you may have scale. I found it almost impossible to eradicate them, and finally had to dump the tree altogether, and I'd grown it from seed. It was 10 years old. Yes. That's their name, all right, and there are several that can infest bay. I have got rid of them from bay and citrus on SMALL plants, by scraping off or damaging every scale with a blunt knife or similar. 2-3 goes and they have gone. But that does mean going over EVERY stem and EVERY leaf, which could be time consuming on a larger plant .... Regards, Nick Maclaren. |
#7
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I would imagine if it was scale insect you would see the scales especially
if they are totally killing the plant.You could look at other things like if it is pot planted does it need repotting,check the roots ,could it have a deficiency,have a good look at the plant for pests they should be visible.Is the plant in a exposed position.If it is none of these it must be diseased. -- Thanks Keith "Nick Maclaren" wrote in message ... In article , Chris Boulby wrote: Peter, this sounds very much like scale insect (not sure if that's their proper name)to me. They are tiny creatures that are hard to spot because they are flat and look like flaky bits. It happened to my grapefruit tree a few years ago. Take a magnifying glass to the undersides of the leaves at the main vein that runs beneath the leaf. If you see brown flat bits there, you may have scale. I found it almost impossible to eradicate them, and finally had to dump the tree altogether, and I'd grown it from seed. It was 10 years old. Yes. That's their name, all right, and there are several that can infest bay. I have got rid of them from bay and citrus on SMALL plants, by scraping off or damaging every scale with a blunt knife or similar. 2-3 goes and they have gone. But that does mean going over EVERY stem and EVERY leaf, which could be time consuming on a larger plant .... Regards, Nick Maclaren. |
#8
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I would imagine if it was scale insect you would see the scales especially
if they are totally killing the plant.You could look at other things like if it is pot planted does it need repotting,check the roots ,could it have a deficiency,have a good look at the plant for pests they should be visible.Is the plant in a exposed position.If it is none of these it must be diseased. -- Thanks Keith "Nick Maclaren" wrote in message ... In article , Chris Boulby wrote: Peter, this sounds very much like scale insect (not sure if that's their proper name)to me. They are tiny creatures that are hard to spot because they are flat and look like flaky bits. It happened to my grapefruit tree a few years ago. Take a magnifying glass to the undersides of the leaves at the main vein that runs beneath the leaf. If you see brown flat bits there, you may have scale. I found it almost impossible to eradicate them, and finally had to dump the tree altogether, and I'd grown it from seed. It was 10 years old. Yes. That's their name, all right, and there are several that can infest bay. I have got rid of them from bay and citrus on SMALL plants, by scraping off or damaging every scale with a blunt knife or similar. 2-3 goes and they have gone. But that does mean going over EVERY stem and EVERY leaf, which could be time consuming on a larger plant .... Regards, Nick Maclaren. |
#9
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On Sun, 01 Feb 2004 12:56:01 GMT, peter123 wrote:
I am having a great deal of difficulty in tracking down a problem with my Bay Tree. We originally had two Bay Trees, the first one died last year with this problem and now it's spread to the other one. These are the symptoms: a. Sticky Leaves b. Leaves go from normal green, to a light green and finally to a dried up golden brown and fall off. c. Occassionally the leaves go black at the tips I have inspected all the leaves and there is no signs of any insects big or small. There is also no sign of any "soot". Look at the underside of the leaves near the mid-rib. Are there thin, pale yellowy-browny deposits there that look something like wax? If so, you have "soft brown scale." It's a bitch to get rid of, but if you don't mind using pettochemical-based insecticides, malathion will do a splendid job. Spray *thoroughly*, leave it for about 15 minutes, then wash it off with spray from a hose. Do NOT try to use malathion in the house. You must do this outside. I'm also assuming that the stuff is still on the market. Alternatively, methodically scrub the scale insects off using a soft toothbrush and soapy water. Soap, not detergent. No matter what method you use to get rid of scale, stay alert for reinfestations; it's a very difficult pest to eradicate completely and is sufficiently ubiquitous in the environment that clean plants can easily become reinfested. -- Rodger Whitlock Victoria, British Columbia, Canada [change "atlantic" to "pacific" and "invalid" to "net" to reply by email] |
#10
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On Sun, 01 Feb 2004 12:56:01 GMT, peter123 wrote:
I am having a great deal of difficulty in tracking down a problem with my Bay Tree. We originally had two Bay Trees, the first one died last year with this problem and now it's spread to the other one. These are the symptoms: a. Sticky Leaves b. Leaves go from normal green, to a light green and finally to a dried up golden brown and fall off. c. Occassionally the leaves go black at the tips I have inspected all the leaves and there is no signs of any insects big or small. There is also no sign of any "soot". Look at the underside of the leaves near the mid-rib. Are there thin, pale yellowy-browny deposits there that look something like wax? If so, you have "soft brown scale." It's a bitch to get rid of, but if you don't mind using pettochemical-based insecticides, malathion will do a splendid job. Spray *thoroughly*, leave it for about 15 minutes, then wash it off with spray from a hose. Do NOT try to use malathion in the house. You must do this outside. I'm also assuming that the stuff is still on the market. Alternatively, methodically scrub the scale insects off using a soft toothbrush and soapy water. Soap, not detergent. No matter what method you use to get rid of scale, stay alert for reinfestations; it's a very difficult pest to eradicate completely and is sufficiently ubiquitous in the environment that clean plants can easily become reinfested. -- Rodger Whitlock Victoria, British Columbia, Canada [change "atlantic" to "pacific" and "invalid" to "net" to reply by email] |
#11
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peter123 wrote:
Hi, I am having a great deal of difficulty in tracking down a problem with my Bay Tree. We originally had two Bay Trees, the first one died last year with this problem and now it's spread to the other one. These are the symptoms: a. Sticky Leaves b. Leaves go from normal green, to a light green and finally to a dried up golden brown and fall off. c. Occassionally the leaves go black at the tips I have inspected all the leaves and there is no signs of any insects big or small. There is also no sign of any "soot". Have you used a good hand lens? Pot grown? Indoors or out? The sticky leaves are almost certainly the result of honeydew excreted by a sucking pest. Scale insects are the usual suspects, aphids at this time of year are unlikely outdoors, indoors they will be small and difficult to see, look right inside the growing points. If it's indoors get it outside this spring and keep it outside in a sheltered place. Pests are probably not your only problem. What about watering/feeding, especially critical if pot grown. A typical scenario is 'See plant looking poorly - water it, A day or 2 later it looks worse - water it more - some days later - it wasn't enough!? - put some feed in with the water............and so it goes on - feed wasn't strong enough?! - double the dose...............dead plant' Like feeding a sick baby on gin and kippers. All this is worse if what is essentially a hardy plant is grown in a pot indoors. I'm putting this as a suggestion, not an accusation but you wouldn't be the first and you won't be the last. -- Rod http://website.lineone.net/%7Erodcraddock/index.html My email address needs weeding. |
#12
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peter123 wrote:
Hi, I am having a great deal of difficulty in tracking down a problem with my Bay Tree. We originally had two Bay Trees, the first one died last year with this problem and now it's spread to the other one. These are the symptoms: a. Sticky Leaves b. Leaves go from normal green, to a light green and finally to a dried up golden brown and fall off. c. Occassionally the leaves go black at the tips I have inspected all the leaves and there is no signs of any insects big or small. There is also no sign of any "soot". Have you used a good hand lens? Pot grown? Indoors or out? The sticky leaves are almost certainly the result of honeydew excreted by a sucking pest. Scale insects are the usual suspects, aphids at this time of year are unlikely outdoors, indoors they will be small and difficult to see, look right inside the growing points. If it's indoors get it outside this spring and keep it outside in a sheltered place. Pests are probably not your only problem. What about watering/feeding, especially critical if pot grown. A typical scenario is 'See plant looking poorly - water it, A day or 2 later it looks worse - water it more - some days later - it wasn't enough!? - put some feed in with the water............and so it goes on - feed wasn't strong enough?! - double the dose...............dead plant' Like feeding a sick baby on gin and kippers. All this is worse if what is essentially a hardy plant is grown in a pot indoors. I'm putting this as a suggestion, not an accusation but you wouldn't be the first and you won't be the last. -- Rod http://website.lineone.net/%7Erodcraddock/index.html My email address needs weeding. |
#13
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![]() "peter123" wrote in message s.com... Hi, I am having a great deal of difficulty in tracking down a problem with my Bay Tree. We originally had two Bay Trees, the first one died last year with this problem and now it's spread to the other one. These are the symptoms: a. Sticky Leaves b. Leaves go from normal green, to a light green and finally to a dried up golden brown and fall off. c. Occassionally the leaves go black at the tips I have inspected all the leaves and there is no signs of any insects big or small. There is also no sign of any "soot". Please help! Thanks. +----------------------------------------------------------------+ | Attachment filename: bay leaf 2.jpg | |View attachment: http://www.gardenbanter.co.uk/attach...?postid=329318| +----------------------------------------------------------------+ -- peter123 ------------------------------------------------------------------------ posted via www.GardenBanter.co.uk |
#14
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![]() "peter123" wrote in message s.com... Hi, I am having a great deal of difficulty in tracking down a problem with my Bay Tree. We originally had two Bay Trees, the first one died last year with this problem and now it's spread to the other one. These are the symptoms: a. Sticky Leaves b. Leaves go from normal green, to a light green and finally to a dried up golden brown and fall off. c. Occassionally the leaves go black at the tips I have inspected all the leaves and there is no signs of any insects big or small. There is also no sign of any "soot". Please help! Apart from the scale insects, especially if pot grown, they can succumb to vine weevil. I guess you would have to remove the plant from the pot (assuming potted) and examine the roots. If there aren't any, then this is probably your problem :-( If the roots are healthy then repot and look for 'sucking' pests. However scale insect should not kill a bay - bad feeding/watering is the thing that normally kills them. HTH Dave R |
#15
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![]() "peter123" wrote in message s.com... Hi, I am having a great deal of difficulty in tracking down a problem with my Bay Tree. We originally had two Bay Trees, the first one died last year with this problem and now it's spread to the other one. These are the symptoms: a. Sticky Leaves b. Leaves go from normal green, to a light green and finally to a dried up golden brown and fall off. c. Occassionally the leaves go black at the tips I have inspected all the leaves and there is no signs of any insects big or small. There is also no sign of any "soot". Please help! Thanks. +----------------------------------------------------------------+ | Attachment filename: bay leaf 2.jpg | |View attachment: http://www.gardenbanter.co.uk/attach...?postid=329318| +----------------------------------------------------------------+ -- peter123 ------------------------------------------------------------------------ posted via www.GardenBanter.co.uk |
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