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RCA #354 BCMA #PD0008b Administrator |
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| <Mark>
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Perhaps willow blight? You really need a first-hand analysis by someone who knows tree diseases. Has anything changed in the planting site? Is the tree getting enough water? Is bark coming off? Do you see insect bore holes? When did the symptoms begin?
willow blight |
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| <Dan>
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hi, i also have a weeping willow but it has some kind of red buds on the trunk base & i have no idea what it is or how to treat it.the leaves are also turning yellow & falling off.im in new jersey ,would too much have something to do with it?
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| <Mark>
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The "red buds", if very small, may be fruiting structures of the fungus Nectria cinnabarina. If so, they are an indication of dead tissue. The cause of the dead tissue may be something else.
In your post there seems to be a word missing after the words "too much". You really need an on-the-spot expert analysis of the tree and site conditions in order to get an accurate evaluation of the tree and a recommendation for what to do. There is an Asian longhorn beetle that is reported to cause leaf yellowing. But the cause could be something else. See the linked site for description of beetle and signs of its presence. About Asian longhorn beetle |
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| <Dawn>
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We have a tall willow tree which never really grows since it was planted in 1999. It has yellow and dotted leaves and dead branches. But the tree is not dead,it just never grows more leaves or branches.
What might be the problem and how to solve the problem? |
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| <Mark>
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Any suggestions I might make are merely guesses. Relevant information may offer us clues, but there is no substitute for an on-the-spot analysis by a qualified professional.
We do not know, for instance, where in the world the tree resides, nor the conditions where it is sited. Be a detective. I like to begin with a good identification of the tree species, since it gives us a starting point for researching diseases. The fact that the tree has been in the ground for part of five years tells me that it is relatively young, and that while "tall", is probably not really very big. It is within what is generally considered an establishment period. The fact that it has dead branches, "yellow and dotted" leaves, and is stagnant in growth indicates a general condition of disease, but doesn't show us what we might see upon examination of the tree in person. Problems of disease may be mainly abiotic, such as improper planting, improper watering, poor soil conditions, physical injury, etc. Or they may be caused by pathogenic organisms. Often there is a complex of the two types of problem. Young trees that aren't doing well are often the victims of potbound nursery stock, girdling roots, root breakage, stem girdling by tape or wire or line trimmers, poor soil water drainage, inadequate irrigation, planting the tree too deeply, over-mulching against the trunk, inadequate light exposure, or a combination of any of these problems. Examine the conditions that affect your tree's happiness. Can you clearly see a flaring of the trunk base, or does it go straight in the ground like a pole? Are there any visible wounds on the bark? Are the yellowing leaves uniformly distributed, or is there a pattern, such as only old or new leaves yellowed, or only on certain branches, etc.? Some conditions can be improved that may result in good growth response by the tree. If the tree has been invaded by pathogens or secondary insect pests attacking a weakened specimen, it may be that nothing will help. Trees are energy systems. They require sufficient light energy to drive photosynthesis to make their own food. They must have efficient transport of water and minerals from the soil through the roots and stem tissues. They must be able to exchange gases in the soil because they respire (use oxygen). They can suffocate in compacted or waterlogged soil. If no other reasons can be found for the tree's stagnation, there may be a soil nutrient or pH problem. High soil acidity or alkalinity can make some elements unavailable for the plant. In more rare events, toxic substances may be influencing the plant, such as gas leaks, deicing salt, herbicides, etc. |
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