| Subject | Date Asked | Expert |
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| small bead-like structures in soil | 11/16/2009 | kathy crowley |
Q: I have small (approx. 0.5 - 0.75 mm) white bead-like structures that are spreading in the soil of my ...
A: what we are coming up with is scale as scale can turn brown. There are so many new insects and ...
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| diseased ligustrum | 11/16/2009 | kathy crowley |
Q: I live in Hollywood Florida and have several ligustrum in my garden, planted in the ground. They ...
A: It may be root rot although if the tree has been there that long its probably not likely. It could ...
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| Krauter Vesuvius flowering plum | 11/15/2009 | Jim Hyland |
Q: I have had a flowering plum for 12 years. Two years ago, I had it pruned, sense that time it blooms ...
A: By "does not leaf out in the Spring' you mean that it has no leaves then it is dead. If you mean ...
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| peas | 11/15/2009 | Dr Stephen Vann |
Q: I have a small hydroponic garden using auto-pot technology.My snow peas were producing really well ...
A: Wayne: The leaves look a bit hungry, however this symptom can be caused by several things- usually ...
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| sick Yucca plant | 11/14/2009 | Dr Stephen Vann |
Q: This is a follow up to my previous questions about my Yucca. I'm in the middle of looking at the ...
A: Alissa: Good Morning! It's Sunday morning here. House calls? WOW. I wish, however I am in Arkansas. ...
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| sick Yucca plant | 11/13/2009 | Dr Stephen Vann |
Q: I've had a Yucca plant for years, but about 3 years ago it started to get sick. It had a bad case of ...
A: Alissa: Thanks for your patience. I do not think that the "film" is a disease, but probably young ...
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| sick Yucca plant | 11/13/2009 | Dr Stephen Vann |
Q: I've had a Yucca plant for years, but about 3 years ago it started to get sick. It had a bad case of ...
A: Alissa: Is the "film" cover the entire leaf or is it in splotches or patches? I cannot see the ...
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| sick Yucca plant | 11/13/2009 | Dr Stephen Vann |
Q: I've had a Yucca plant for years, but about 3 years ago it started to get sick. It had a bad case of ...
A: Alissa: Can you send a closeup photo of the film? If so, review photo on your computer first to be ...
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| Japanese Maple infested by borer | 11/12/2009 | Dr Stephen Vann |
Q: I have discovered my maple tree arrox 30 yrs old has a disease on the bark which has killed one limb ...
A: Ruth: Once in the tree, borers are difficult if not impossible to kill inside the tree. If you ...
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| lemon infestation | 11/12/2009 | Dr Stephen Vann |
Q: Dr Vann, my lemon tree has an infestation of black, semi circular growths all along the branches. ...
A: Madeleine: I do not recognize any sort of plant disease from your photo, however these structures ...
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| Apple tree | 11/12/2009 | Dr Stephen Vann |
Q: I moved in this new place and there's an apple tree in the yard. The apples are quite small and ...
A: Filip: I do not recognize a disease from your image, however there appears to be some possible ...
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| white spots on maple leaves & holes on trunk of tulip tree | 11/11/2009 | Dr Stephen Vann |
Q: What are the white spots on maple leaves? Can this be spread to other trees? There are small round ...
A: Jane: The holes in the tree are from a sapsucker (type of woodpecker)-maybe a yellow bellied ...
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| Weeping Willow Disease | 11/11/2009 | Jim Hyland |
Q: My old, formerly-healthy Alameda, CA weeping willow is suddenly exuding a clear, gelatinous ...
A: Larger, reasonably healthy trees seem to outgrow the problem. A weaker tree may have frothy flux for ...
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| Palm Tree | 11/10/2009 | Dr Stephen Vann |
Q: Do you know what is causing this on this filifera. Can anything be done for it? Thank you very much ...
A: John: Thanks for the followup information. I am not familiar with the effects of cold temperatures ...
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| Weeping Willow | 11/8/2009 | Dr Stephen Vann |
Q: I have a weeping willow in my back yard. It was here when I bought my home in 1998. It has always ...
A: Patti: Look for any evidences of bark damage or loosening, especially near the base and up on the ...
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| Palm Tree | 11/8/2009 | Dr Stephen Vann |
Q: Do you know what is causing this on this filifera. Can anything be done for it? Thank you very much ...
A: John: I was unable to locate the images that you mentioned. Can you send the specific link and I ...
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| mulberry trees | 11/8/2009 | Jim Hyland |
Q: Do large black blotches on the trunk of a Mulberry tree indicate some type of disease?
A: Sounds like Lichens. Lichens are an example of a symbiotic relationship between algae and certain ...
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| white rice looking things on all leaves of gardenia plant | 11/4/2009 | Dr Stephen Vann |
Q: I brought the plant for the winter and it has developed in a short period of time this white rice ...
A: It's getting about that time of the year to bring the plants in off the deck or porch. We have ...
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| gnats | 11/4/2009 | kathy crowley |
Q: I have New Guinea Impatiens that I brought into the house for the winter about a week ago. The soil ...
A: sounds like white flies as they are small and scatter when you move the plant. I sould suggest ...
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| brown spots on maple leaves | 11/4/2009 | Jim Hyland |
Q: I live near Philadelphia and have an almost 30-year-old maple tree in my backyard. This fall I have ...
A: These are leaf spot caused by a fungus. I am going to guess it is Phyllostict leaf spot. A leaf spot ...
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| green growth on maple tree trunk | 11/4/2009 | Jim Hyland |
Q: I live near Philadelphia and have a treasured maple tree in my backyard that has a fairly heavy ...
A: These are lichens. Lichens are an example of a symbiotic relationship between algae and certain ...
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| Black Knot on Cherry Trees | 11/3/2009 | Jim Hyland |
Q: My wife and I have a 7 acker lot on a lake in Northern Minnesota. A summer place and we will be back ...
A: Black knot can be managed by pruning out and destroying all galls infecting the tree. Prune trees ...
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| junipers & boxwoods | 11/3/2009 | Dr Stephen Vann |
Q: I will try to explain as best as possible; firstly we recently moved into a new home that already ...
A: Eileen: Good Morning! A bit too cold for me where you are. Tonight here- 40's w/clear skies. Highs ...
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| mold in and on soil | 11/3/2009 | kathy crowley |
Q: Ok im not going to candy coat this so please do not get offended . I grow medical marajuana for ...
A: Mold is a by product of excessive moisture due to lack of sunlight, air, over watering etc... in ...
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| emerald arbovitaes disease? | 11/2/2009 | Dr Stephen Vann |
Q: Dr. Van We have 19 emeralds I am very concerned about.Much like Trish we have a golden/orange ...
A: Jim: Just keep an eye on them. Browning/bronzing foliage on the inside is a normal event this time ...
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| boxwood problems | 11/1/2009 | Dr Stephen Vann |
Q: I planted three boxwoods about 2 months ago. Purchased from a very reputable nursery. The leaves on ...
A: Ellen: From your description, this doesn't sound like a normal thing. This discoloration may be ...
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| junipers & boxwoods | 10/31/2009 | Dr Stephen Vann |
Q: I will try to explain as best as possible; firstly we recently moved into a new home that already ...
A: Eileen: I'd suggest not replacing the junipers until you can determine their health status- maybe ...
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| Cleveland Pear in trouble? | 10/30/2009 | kathy crowley |
Q: We bought a Cleveland Pear about 2 months ago (late August) and planted it immediately in our ...
A: I would turn off the hose. The tree is resistant to droughts, which means you do not have to ...
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| junipers & boxwoods | 10/30/2009 | Dr Stephen Vann |
Q: I will try to explain as best as possible; firstly we recently moved into a new home that already ...
A: Eileen: Junipers prefer well drained soils. Excessive soil moisture can lead to comlicated root ...
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| emerald arbovitaes disease? | 10/29/2009 | Dr Stephen Vann |
Q: Dr. Van We have 19 emeralds I am very concerned about.Much like Trish we have a golden/orange ...
A: Jim: I suspect that the change in color, especially if it is occuring on many of these plants is ...
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| Arborvitae Damage | 10/29/2009 | Jim Hyland |
Q: Our trees had some bagworms that did some damage. One of the trees is still brown on top...can we ...
A: Yes the foliage should grow back from bagworm feeding. I would wait until next spring and see how ...
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| Winterberry | 10/28/2009 | Dr Stephen Vann |
Q: Steve here are some pictures of that winterberry with those black spots. thanks again Mike
A: Mike: Thanks for the photo. This photo may suggest some type of fungus disease. There are a few ...
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| Fox Tail Palm Diease? | 10/28/2009 | Dr Stephen Vann |
Q: We have some foxtail palms that we planted 3 years ago. This year, we noticed that several of the ...
A: Lois: I don't think this is an infectious/contagious situation. It may be related to a potential ...
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| Mimosa Wilt | 10/27/2009 | Jim Hyland |
Q: Most articles talk about Maryland and south. Any history of this disease occuring on Long ...
A: Yes the disease is on mimosa trees where ever they will grow. The mimosa tree's native range is ...
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| New Bradford Pear tree dying? | 10/26/2009 | Dr Stephen Vann |
Q: I recently purchased 2 Bradford Pear Tree's. They are still in their plastic 20 gal. containers. ...
A: Mary: Leaf browning may be due to root related stress. This can be, among other things lack of or ...
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| Ivy | 10/26/2009 | Dr Stephen Vann |
Q: Over the past few months the ivy outside my walk way has lost it's leaves and the vines are exposed. ...
A: Judy: In most cases, the "root rots" are associated with the soil remaining wet or saturated for ...
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| Oak tree damage | 10/26/2009 | Dr Stephen Vann |
Q: I live in the panhandle of FL and have a young pin oak whose leaves are looking awful. They have ...
A: Annette: Congratulations! It came through in flying colors. This is a very common fungus disease ...
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| Fruitless Mullberry | 10/26/2009 | Dr Stephen Vann |
Q: We have a fruitless mullberry tree that is 65 to 70 years old. It is beginning decay. Do you have ...
A: Kathy: Unfortunately, there is not a magic bullet. The decay is often a slow, yet progressive ...
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| pin oak tree | 10/25/2009 | Dr Stephen Vann |
Q: We have a mature pin oak tree in our front year. This year, the bark has started to fall off, the ...
A: Jeff: From your description, I would suspect that your tree may have some level of decay inside. If ...
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| Honey Locust Tree | 10/25/2009 | Dr Stephen Vann |
Q: For the first time ever, 20+ years, our two side-by-side honey locust trees have no seed pods. ...
A: Michelle: If the tree seems and looks healthy otherwise, I'd sit tight and relax. Weather conditions ...
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