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.

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Ragweed that has lost its' bloom and now has a cott0n type substance

Why does ragweed develop a cotton type of substance before it had a yellow flowers. It did have worms which I took care of with water.
Denny Van Orman
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Why is my Aloe losing leaves?

I’ve had this plant since August and recently it has lost a couple of leaves, I was wondering if anyone could identify a cause. Thanks
Charlotte
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Part of the citrus leaves are dull and dark graying

I did look up different diseases online but I'm having a hard time finding a match for these symptoms, the leaves with the dull color feel drier and not as smooth the the touch as regular normal leaves. Could someone identify the problem here…
ammoun
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What's wrong with my tamarind?

These four saplings are grown from seed around 6-10 months was growing perfect untill around 4 weeks ago I started to see a little bit of yellowing thinking its nothing untill now.
Joseph Wit
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My poor sick apple tree - what’s the mould?

This apple tree has this growth on many of its branches (say, 30%). It also hardly produces any fruit. How can I make this tree healthier?
nasty pasty
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My song of india plant have these light brown spots. What are they?

These brown spots are worring me please tell me are they natural or a symptom of a disease. They are just printed on the leaves.!
Vinayak Jadia
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Chilli leaf curl downwards

I have few chilli plants in a medium sized pot. Last few days I could notice some of the leaves are curling downwards and there is no color change. I am unable to find other issues in the plant. I could see few leaves in the plant is like that and…
user23599
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Dwarf Umbrella Plant Drooping

My umbrella plant suddenly started drooping. The leaves at the bottom drooped first and then the ones at the top. Now the whole plant has drooped. Is there any way I can bring back the plant? What has caused this?
Alisha G
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What is this disease with sticky transparent liquid and brown spots on leaves?

here is a picture of the plant, a shefflera. It has some very sticky transparent liquid on many leaves, and also brown spots. The spots themselves are kind of "dry" and mostly located at the leaves knots. It seems that the entire plant is becoming…
Kev
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What's causing dry crispy leaves on Vaccinium membranaceum?

I'm in the Willamette Valley in Oregon, USA, (USDA zone 8b) and I have a Vaccinium ovatum, Vaccinium parvifolium, and a Vaccinium membranaceum in a section of my garden. They're shaded up until noon by a row of Leyland Cypress 10 feet to the east…
watkipet
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Basil leaves are scarred and wrinkled

My indoor basil plant has developed some scarring and has some pretty deformed leaves. Could it be due to the caterpillar that chewed up quite a few leaves a few weeks ago, or is something else the matter? The undersides of the leaves look healthy.
Ryan Kavanagh
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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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What pest is affecting my tomato plants?

This is the fourth year I've been growing tomatoes in my garden, but this is the first time I see this pest affecting my plants. The plants have black, brown spots on yellowing leaves. On some of the plants (see first two photos), the pest has…
Domi
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Spots on Magnolia

My Kay Parris Magnolia has some odd white spots on it. I’m wondering what these could be and how to deal with them?
Simon E
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treating potato plant disease with ridomil

Potatoes in our garden got attacked by a disease. Take a look: Presumably, this is late blight. The recommended practice is to spray potatoes with ridomil fungicide. I am very skeptical about using it. Do you think this is the way to go? Are there…
sanjihan
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