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Tue, Jun 5, 12 at 10:09
| Hello my australian friends.I have an eucalyptus tree planted in the field about 1 year old and few weeks ago i noticed that red spots start to appear on the leaves.So i took the camera and captured it,please look at this and try to help me because the tree almost does'nt grow and now is the beggining of the summer so it shoud grow fast.
http://www.youtube.com/watch?v=-0Iy_FHvYlY |
Follow-Up Postings:
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| Dear Lucaci, In Australia, it is common for Eucalyptus trees to have individual damage to their leaves through many many causes - insects, disease, damage from wind or animals, too much water, too little water. Or, age. The list goes on. In fact, if you were to look at a tree here, it would be rare to find one leaf that did not have a mark of some kind. But, Australia has its own pests and diseases and climate, and I am sorry I don't know very much about those of Israel, or your soils or other factors. To say "red spots" here, would suggest either an insect like a psyllid or similar - a sort of bump or indentation on the leaf, which is either the insect or the leaf's reaction to the attack. I do not think this is your problem. Also I am not aware of your area having the sort of fungal problems that have become known in Australia. Your video gives a good idea of the area, but it is not terribly clear on the leaf problem. I would say that if you google "red spot" you would receive the wrong results - they would relate to a raised lump on the leaf. In the case of your tree, the marking seems to be a discolouration on an other-wise smooth leaf. Yet, the tree itself, does not look well. I am thinking the blotching of the leaves reflects some general unwellness of the plant, and not a pest or disease. Please, I am no expert in this field, just my opinion. I notice two things immediately from your video and that is - your trees are planted in an area very heavy with other vegetation, and I wonder if firstly the competition of roots from grasses or other close shrubs, is affecting the trees' growth and causing a stress which is reflected in the slow growth and leaf markings (and I wonder if the markings are just a prelude to the death of those leaves_ Secondly I notice your lovely dogs, but I wonder if on your walks, your dogs may urinate on or immediately near the tree, in which case there may be an adverse reaction to the concentrated nitrogen. Finally I am sorry again not knowing your area, there may be factors of soil, rainfall, weather, any of which might contribute to ill-health of a young plant which is grown in a "new home". The type and depth of soil, watering, coldness or heat, fertilizing or otherwise might all be factors. I hope your trees survive - do you know their species? Regards Alison |
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| Yeah species and answers to Alison's other questions together with an immediate photo (without having to go to youtube) would help. Why not post one directly to your messgage via 'Photobucket'? Bill |
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| Guys thanks for reactions,finnaly i found the problem..i am shure it's a Gall Wasp..Yes it took me a while to find it on google but it seems that's the reason of those spots that are in fact an eggs of the wasp...In 2000 they got here and now some israeli forest activists braught their natural enemy(other wasp) from Australia but my tree is already affected so i think those red leaves will fall down..I will make a good photo and upload into here..Sorry about my english... |
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| Lucaci, your English is fine, don't worry. We have no trouble understanding you. You can only post a photo in this thread, if you have a link to another source of the photo, or embed the photo within your message but right now I forget how. It may be easier if you post in the Australian photo gallery, then you can post here that you have done so. Your photos that way have to be under 61k though. |
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| I posted your photo on another gallery, someone came back with the comment that he didn't think it was gall wasp, as the wasp actually lives in the gall and id didn't look like the bumps on the leaves of yours were distinct enough. Instead he suggested it might be Oedema or Septoria blight. I suggest if you google both of those coupled with the word "eucalyptus" there seem to be plenty of articles, and some google photos also. Hope that helps a little. Good luck with your trees |
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| Thank you Alisonoz i checked on the web about that simptom and it seems the problem was lead by a long rainfall that we had this year..actualy the temperature was not enough high for growing and the eucalyptus grew up maybe a few cm. during the winter but it affected the roots probably or something.. |
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| Ok guys forget about the spots..sheeps ate all the leaves..yeah it's real,look at the photos.. |
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- Posted by emily_aust nsw,aust (My Page) on Sun, Sep 16, 12 at 18:45
| In truth, no one knows, I had a 4yr old Eucalypt die from those red spots, other Eucalypts near by are doing just fine. |
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| Ok,now part 2! After new leaves beautifly grew up i ve noticed this Septoria blight appeard again..I feel helpless that i cannot do anything..the simptom apears from the bottom leaves and goes up ..i removed all bottom leaves but the spots appear at the left leaves later.. |
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| You never said, what type of Euc it is... that might make a difference if it is a species which is not resistant. Do you know its specie? If you have looked at articles on the Web, you have also probably read that younger Euc nitens esp have this problem but that if they survive past 2 years they may outgrow it. I guess for now you could try fungicide but then you have a couple of problems - what to use, and how to use it - creating a small "tent" of plastic would probably be of more use to reach all affected leaves without the fungicide simply spraying into the air - easier now while they are small - you could probably do it a couple of times now and then wait over winter until before the new growth starts - is there any harmful effect from using fungicide on anything else there - you mentioned sheep - can you remove them while this is going on? - what else is in the neighbourhood that might be a host to the fungus, or might be infected by the fungus - and can you do anything about that - what do if the plants survive but still have the fungus and grow too big to spray with fungicide? - again, is it a species too susceptible to this and should they be replaced with another species of euc- what is your purpose of growing them? |
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| Thanks for the reply.I have no idea what tye of euc is it.I know only that i took the seed near the home from euc that fell good and are growing about 10 years without any deseases.I ve planted mine in the field close to ditch but the water is there only during the winter so there is not overwater.Now after the sheeps ate the affected leeves and new grew up only one of the trees is affected,the one with a lot of leeves.The other with slightly leaves feels good. I will try some unconventional method and today i gonna spray on it water mixed with a bit of kefir |
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| Two months growing with Noa da model! |
This post was edited by lucaci on Tue, Jan 1, 13 at 20:36
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| Two months growing with Noa da model! |
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| congratulations, what a difference! |
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