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Sort of palm tree has sticky secretion on underside of leaves
Sorry for not being able to offer an accurate description of the
problem but I'm a complete newbie at gardening. I'm posting another question separately, too. I have a plant that looks a little palm-tree- ish and it appears to be growing fine. However it has a sticky secretion on the underside of its leaves and I'd really like to know what it is. The whole plant: http://img204.imageshack.us/i/palmproblem2a.jpg/ The secretion: http://img521.imageshack.us/i/palmproblem2b.jpg/ Any thoughts would be greatly appreciated! Paul |
#3
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Sort of palm tree has sticky secretion on underside of leaves
"Paul" wrote in message ... Sorry for not being able to offer an accurate description of the problem but I'm a complete newbie at gardening. I'm posting another question separately, too. I have a plant that looks a little palm-tree- ish and it appears to be growing fine. However it has a sticky secretion on the underside of its leaves and I'd really like to know what it is. The whole plant: http://img204.imageshack.us/i/palmproblem2a.jpg/ The secretion: http://img521.imageshack.us/i/palmproblem2b.jpg/ Any thoughts would be greatly appreciated! Paul I couldn't receive your first picture, but the second shows another Cordyline. I can see some white detritus which may be the old egg cases of aphids. I suggest you spray with insecticide, but be careful not to overwet the crown. The stickiness you're feeling is the secretion (actually, excretion) of the aphids, often known as 'honeydew', for obvious reasons. The aphids, if left, will suck the sap of your plant, which is bad enough, but they may also introduce virus from another plant. It is unlikely that you would be able to treat the virus so the plant would need to be destroyed. Another secondary problem is that the honeydew can attract black sooty mould, which is more unsightly than harmful, but still unwanted. When clean of the pest, you may wish to sponge the leaves carefully. Spider |
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#5
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Sort of palm tree has sticky secretion on underside of leaves
"echinosum" wrote in message
... 'Spider[_2_ Wrote: ;856237']"Paul" wrote in message ...- Sorry for not being able to offer an accurate description of the problem but I'm a complete newbie at gardening. I'm posting another question separately, too. I have a plant that looks a little palm-tree- ish and it appears to be growing fine. However it has a sticky secretion on the underside of its leaves and I'd really like to know what it is. The whole plant: http://tinyurl.com/mgdvnw The secretion: http://tinyurl.com/npsgve Any thoughts would be greatly appreciated! Paul - I couldn't receive your first picture, but the second shows another Cordyline. I can see some white detritus which may be the old egg cases of aphids. I suggest you spray with insecticide, but be careful not to overwet the crown. The stickiness you're feeling is the secretion (actually, excretion) of the aphids, often known as 'honeydew', for obvious reasons. The aphids, if left, will suck the sap of your plant, which is bad enough, but they may also introduce virus from another plant. It is unlikely that you would be able to treat the virus so the plant would need to be destroyed. Another secondary problem is that the honeydew can attract black sooty mould, which is more unsightly than harmful, but still unwanted. When clean of the pest, you may wish to sponge the leaves carefully. Spider The first picture to me is plainly Dracaena marginata, a common house-plant, neither a cordyline (cabbage tree) nor a palm. If I only had the second picture, I wouldn't know what it was. But whatever it is, I would have offered the same diagnosis as Spider. -- echinosum I bow to your greater wisdom, Echinosum, esp since you saw the bigger picture (as the saying goes). Thanks for your support on the remiander. :~) Spider |
#6
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Sort of palm tree has sticky secretion on underside of leaves
On Jul 16, 12:15*am, "Spider" wrote:
"echinosum" wrote in message ... 'Spider[_2_ Wrote: ;856237']"Paul" wrote in message ....- Sorry for not being able to offer an accurate description of the problem but I'm a complete newbie at gardening. I'm posting another question separately, too. I have a plant that looks a little palm-tree- ish and it appears to be growing fine. However it has a sticky secretion on the underside of its leaves and I'd really like to know what it is. The whole plant:http://tinyurl.com/mgdvnw The secretion:http://tinyurl.com/npsgve Any thoughts would be greatly appreciated! Paul - I couldn't receive your first picture, but the second shows another Cordyline. *I can see some white detritus which may be the old egg cases of aphids. *I suggest you spray with insecticide, but be careful not to overwet the crown. *The stickiness you're feeling is the secretion (actually, excretion) of the aphids, often known as 'honeydew', for obvious reasons. The aphids, if left, will suck the sap of your plant, which is bad enough, but they may also introduce virus from another plant. *It is unlikely that you would be able to treat the virus so the plant would need to be destroyed. *Another secondary problem is that the honeydew can attract black sooty mould, which is more unsightly than harmful, but still unwanted. When clean of the pest, you may wish to sponge the leaves carefully. Spider The first picture to me is plainly Dracaena marginata, a common house-plant, neither a cordyline (cabbage tree) nor a palm. *If I only had the second picture, I wouldn't know what it was. But whatever it is, I would have offered the same diagnosis as Spider. *-- echinosum I bow to your greater wisdom, Echinosum, esp since you saw the bigger picture (as the saying goes). *Thanks for your support on the remiander.. :~) Spider Hi all, Thanks for such detailed responses! Charlie - I am in Israel so harsh winters are not so much of a problem :-) Spider - I'm trying to see what "white detritus' you mean. It could be the photograph because the material on the underside of the base of the leaves in the centre of the photograph is a clear-ish sticky substance. The top side of the leaves towards the bottom of the picture are just very dusty (it's hard to keep them free of dust in the desert!) - is that what you were referring to? If you click on the picture a couple of times it allows you to zoom in. Could you describe in more detail where the detritus you describe is located? Thanks again in advance, Paul |
#7
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Sort of palm tree has sticky secretion on underside of leaves
"Paul" wrote in message ... On Jul 16, 12:15 am, "Spider" wrote: "echinosum" wrote in message ... 'Spider[_2_ Wrote: ;856237']"Paul" wrote in message ...- Sorry for not being able to offer an accurate description of the problem but I'm a complete newbie at gardening. I'm posting another question separately, too. I have a plant that looks a little palm-tree- ish and it appears to be growing fine. However it has a sticky secretion on the underside of its leaves and I'd really like to know what it is. The whole plant:http://tinyurl.com/mgdvnw The secretion:http://tinyurl.com/npsgve Any thoughts would be greatly appreciated! Paul - I couldn't receive your first picture, but the second shows another Cordyline. I can see some white detritus which may be the old egg cases of aphids. I suggest you spray with insecticide, but be careful not to overwet the crown. The stickiness you're feeling is the secretion (actually, excretion) of the aphids, often known as 'honeydew', for obvious reasons. The aphids, if left, will suck the sap of your plant, which is bad enough, but they may also introduce virus from another plant. It is unlikely that you would be able to treat the virus so the plant would need to be destroyed. Another secondary problem is that the honeydew can attract black sooty mould, which is more unsightly than harmful, but still unwanted. When clean of the pest, you may wish to sponge the leaves carefully. Spider The first picture to me is plainly Dracaena marginata, a common house-plant, neither a cordyline (cabbage tree) nor a palm. If I only had the second picture, I wouldn't know what it was. But whatever it is, I would have offered the same diagnosis as Spider. -- echinosum I bow to your greater wisdom, Echinosum, esp since you saw the bigger picture (as the saying goes). Thanks for your support on the remiander. :~) Spider Hi all, Thanks for such detailed responses! Charlie - I am in Israel so harsh winters are not so much of a problem :-) Spider - I'm trying to see what "white detritus' you mean. It could be the photograph because the material on the underside of the base of the leaves in the centre of the photograph is a clear-ish sticky substance. The top side of the leaves towards the bottom of the picture are just very dusty (it's hard to keep them free of dust in the desert!) - is that what you were referring to? If you click on the picture a couple of times it allows you to zoom in. Could you describe in more detail where the detritus you describe is located? Thanks again in advance, Paul Hi Paul, I see what you mean. I zoomed right in (400 o/o) and it was apparent that what looked white is actually clear globules reflecting white light! Sorry about that. Mmmm. It could still be aphid honeydew of course, although there's no real evidence now. I suppose it's just possible that the plant could be weeping sap. If it were my plant (and bearing in mind there are partial leaves where you've cut it back), I would cut away another band of leaf and **very carefully** taste the sap. Wash your mouth out well afterwards! I don't know myself whether it's bitter or sweet but, supposing it's bitter .. and the honeydue is sweet, you will know if the drops are sap or not. I would understand if you didn't feel safe doing this, especially as the result isn't exactly a precise indicator. The remaining options are to a) live with it or b) spray with an insecticde anyway, then clean up the foliage. It's really up to you. At the moment, it's not particularly unsightly and the plant looks healthy. Have a really close look in the leaf bases and central shoot to see if there is any kind of pest (aphid, red spider mite ..). Because you're in Israel, there may be a pest unknown to Britain, so you would need to check with your local garden centre or a good library. Spider |
#8
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Sort of palm tree has sticky secretion on underside of leaves
On Jul 16, 5:06*pm, "Spider" wrote:
"Paul" wrote in message ... On Jul 16, 12:15 am, "Spider" wrote: "echinosum" wrote in message ... 'Spider[_2_ Wrote: ;856237']"Paul" wrote in message ...- Sorry for not being able to offer an accurate description of the problem but I'm a complete newbie at gardening. I'm posting another question separately, too. I have a plant that looks a little palm-tree- ish and it appears to be growing fine. However it has a sticky secretion on the underside of its leaves and I'd really like to know what it is. The whole plant:http://tinyurl.com/mgdvnw The secretion:http://tinyurl.com/npsgve Any thoughts would be greatly appreciated! Paul - I couldn't receive your first picture, but the second shows another Cordyline. I can see some white detritus which may be the old egg cases of aphids. I suggest you spray with insecticide, but be careful not to overwet the crown. The stickiness you're feeling is the secretion (actually, excretion) of the aphids, often known as 'honeydew', for obvious reasons. The aphids, if left, will suck the sap of your plant, which is bad enough, but they may also introduce virus from another plant. It is unlikely that you would be able to treat the virus so the plant would need to be destroyed. Another secondary problem is that the honeydew can attract black sooty mould, which is more unsightly than harmful, but still unwanted. When clean of the pest, you may wish to sponge the leaves carefully. Spider The first picture to me is plainly Dracaena marginata, a common house-plant, neither a cordyline (cabbage tree) nor a palm. If I only had the second picture, I wouldn't know what it was. But whatever it is, I would have offered the same diagnosis as Spider. -- echinosum I bow to your greater wisdom, Echinosum, esp since you saw the bigger picture (as the saying goes). Thanks for your support on the remiander. :~) Spider Hi all, Thanks for such detailed responses! Charlie - I am in Israel so harsh winters are not so much of a problem :-) Spider - I'm trying to see what "white detritus' you mean. It could be the photograph because the material on the underside of the base of the leaves in the centre of the photograph is a clear-ish sticky substance. The top side of the leaves towards the bottom of the picture are just very dusty (it's hard to keep them free of dust in the desert!) - is that what you were referring to? If you click on the picture a couple of times it allows you to zoom in. Could you describe in more detail where the detritus you describe is located? Thanks again in advance, Paul Hi Paul, I see what you mean. *I zoomed right in (400 o/o) and it was apparent that what looked white is actually clear globules reflecting white light! *Sorry about that. Mmmm. *It could still be aphid honeydew of course, although there's no real evidence now. *I suppose it's just possible that the plant could be weeping sap. *If it were my plant (and bearing in mind there are partial leaves where you've cut it back), I would cut away another band of leaf and **very carefully** taste the sap. *Wash your mouth out well afterwards! *I don't know myself whether it's bitter or sweet but, supposing it's bitter .. and the honeydue is sweet, you will know if the drops are sap or not. *I would understand if you didn't feel safe doing this, especially as the result isn't exactly a precise indicator. *The remaining options are to a) live with it *or b) spray with an insecticde anyway, then clean up the foliage. It's really up to you. *At the moment, it's not particularly unsightly and the plant looks healthy. Have a really close look in the leaf bases and central shoot to see if there is any kind of pest (aphid, red spider mite ..). * Because you're in Israel, there may be a pest unknown to Britain, so you would need to check with your local garden centre or a good library. Spider Hi Spider, Thanks for getting back to me again. As far as I can tell, there are no pests hiding between the leaf bases but you never know. I didn't realise plants sometimes just leaked sap. Your suggestion of local knowledge is probably the most sensible - I might go back to where I bought it with a leaf to ask them what they think. Thanks again, Paul |
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