Gardening and Landscaping Stack Exchange
Gardening and Landscaping Stack Exchange

Questions tagged [diseases]

For questions related to plant diseases.

Plants can be infected by a number of diseases. These can be caused by micro-organisms (e.g. bacteria, fungi, viruses; and multi-cellular creatures such as nematodes).

Macroscopic creatures (e.g. mites and aphids) and water/nutrient problems (too little or too much) can also cause symptoms that can be confused with diseases.

Use this tag for all questions related to diseases - especially diagnosis, management, and cures. Please include pictures of the affected parts of the plants.

838 questions
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Ring around the collar?

I have an English walnut that is approx. 5-6 years old. There is a White fungus growing in the collar from a branch I removed. Is it harmful or caused by moisture? The tree is 20 feet tall and is bearing nuts. In the state of Wisconsin.
Sue Will
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7
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How to get rid of the White fly

I noticed I got once again the white flies on my herbs and vegetables. I tried to get rid of it by planting Basil close to them, and it worked for some time but now they are back again. I have heard and tried vinegar mixed with water? This time the…
Valentina Droguett
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6
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2 answers

Dieback: Syndrome or Disease?

Is dieback a real disease? As in; a living pathogenic microorganism (i.e. germ, virus, bacteria)? Or is it just a term used to describe a common correlation (of symptoms) or syndrome?
voices
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5
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Hibiscus buds turning brown before opening

My Hibiscus is loaded with buds, however they turn dark brown and never open. The leaves did have some signs of disease but we have sprayed the plant and it is looking better, however the buds are ready to open and then they turn brown. This only…
Gloria Rakes
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4
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help identifying fungi/virus on Agave americana

TL;DR I'm trying to identify a pathogen on my agave. I have an Agave americana in my yard in New Orleans, LA. It has generally grown vigorously, although it sometimes struggles during wet + cloudy spells. For a while there was clearly an infection…
sformel
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4
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1 answer

Bark is falling off on our trees. Could it be Dutch elm disease?

We live in New York. Bark is falling off several of our trees. Could it be Dutch elm disease? It’s falling off in slivers.
Concerned
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4
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Whats wrong with our two Jasmine Plants

We bought these two grown Jasmine plants 2 months ago when they had a few flowers and healthy green leaves. But now it looks like they are afflicted with some disease. We live in Pune, India. The weather these days is like Temp: 15 to 30 deg C,…
lithiumhead
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4
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Can someone identify Desert Rose Leaf problem?

I bought this Desert Rose from a big box store on clearance about a month ago. The leaves had this trailing/patchy lighter discoloration on the leaves when I purchased. Thought I could re-pot it and fertilize and get rid of the issues. Although I am…
Raesunrae
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3
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1 answer

Gardening. Potted cucumber plants

My potted cucumber plants appear to have mosaic virus. How is an insect barrier created?
Janeth J Childers
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3
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1 answer

What’s wrong with my Marigolds?

Not sure what’s wrong with my plants. They get water, fertilizer and have been sprayed with Safer’s 3-in-1 as well. Any ideas?
Kanayo101
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3
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I was wondering if my Chocolate Mint plant had some type of disease?

So, I've had this Chocolate Mint plant for about a month now and some/most of the stems are brown. Some leaves on this plant also have brown spots on them, but not all are affected! So my question is: does my mint plant have a disease, too much…
Savannah O
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3
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What disease does my hemlocks have

I am not entirely sure they are hemlock trees. They were not doing so hot when I moved in 2015, but it's getting worse over the past few years. They are located near Albany, New York State, US. Photos are taken on Jun 3rd, 2018. There are growths on…
Morio
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3
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1 answer

Can I do anything about horse chestnut leaf miner?

I have a young horse chestnut tree in the garden, about twelve feet tall. Most of the leaves are discoloured by leaf miner. Can I do anything? I am in London UK.
John Nygate
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3
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Is there anything wrong with my raspberry (heritage everbearing, zone 7)

I'm trying to find out if there is something wrong with my raspberry plant. I was gifted with this plant about two weeks ago. It did have some damaged canes which had to be cut away, but I do not remember making this cut as I would not have cut it…
SouthernGardner
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2
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what is this on my cowpea leaves?

Found this on my cowpeas. Looks like some kind of infection splashed onto the leaves, so bacterial or fungal probably. Any ideas? My best guess so far is Cercospora.
Korgan Rivera
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