Questions tagged [diseases]

For questions related to plant diseases.

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1
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0answers
39 views

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
4
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3answers
178 views

Is there a problem with my Japanese Maple shrub?

We live in Vienna, Austria, very near the Danube. We planted this Japanese Maple in the first year after moving in the spring of 2013. It has been slow but steady growing, improving a bit every year. ...
1
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0answers
23 views

Apple tree concerns

I purchased a house with an apple tree, maybe 15' tall and 6" in diameter. The tree has two longer branches and I was wondering how to go about trimming them. If anyone can tell me where to make the ...
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1answer
90 views

What cactus' disease is this?

My sister has this cactus with those brown spots in it. It does not seem to be spreading, or if it is, is very slowly. Does anyone know what it is so we can treat it?
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0answers
237 views

Why is my marigold drooping

Just a couple of hours ago my marigold was fine, the next time I saw it.... It had its leaves dropping, soil dry but the flowers were fine. The two leaves at the beginning of the stem are starting to ...
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1answer
63 views

Crippled nectarine tree leaves

Not sure what's causing this crippling on the leaves of nectarine leaves. Please help. Zone:9 (northern California)
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2answers
4k views

Is the rapid new growth on this rose bush a sign of Rosette?

I recently trimmed back a rose bush (I believe it's a Liebeszauber Hybrid Tea Rose?) that sits in some shade in my front yard, as its branches grow pretty long and eventually start leaning into its ...
2
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1answer
947 views

Need help with disease on bronze loquat

I have a bronze loquat in my front yard and noticed some dark brown spots (see pictures) on the leaves. I need help identifying what the plant disease is and what I can do to get rid of it.
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1answer
76 views

What are these things on my apple tree?

I have recently bought an orchard. And one of my trees has these things on its bark. Is these some kind of infection? is it important and what should I do about it?
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1answer
1k views

Is something wrong with my ZZ plant?

This morning I looked over my ZZ plant and saw these white spots underneath some of the leaves. The best match I could find is something called powdery mildew. Is it that or is it something else?
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0answers
22 views

Cherry tree fungus

I’ve got a cherry tree of some variety (at least, I think that’s what it is). Last winter, some black fungus clusters started forming on some of the branches. I figured I should snip them all off the ...
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2answers
170 views

Diseased roses: salvagable, or a danger to my other plants?

This poor potted rose bush (don't know the type) has just been getting worse and worse: Clearly a disease, but what? Can it be saved? I've already pruned 2 branches that had basically died, but it's ...
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0answers
395 views

Purple edge on black berry leaves

Hi, I recently bought a blackberry plant (Navaho) and was wondering if any one can help me work out what's going on with it. It has purple edges on all the leaves, one or two have larger purple ...
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3answers
2k views

What are these white streaks on my tomato plant?

I've also seen similar streaks on my basil's leaves but not as pronounced.
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2answers
13k views

How to treat a succulent with holes in its leaves?

I have a succulent plant that got some disease and is covered with holes. The holes started to appear a month ago. At first they were green (like something was eating it), probably growing and then ...
3
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0answers
57 views

What is wrong with my hibiscus?

enter image description here The growth on this little tree seems much slower than it's sibling. The leaves appear to be growing very misshapen and start to curl under. It's almost as if it's being ...
2
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3answers
7k views

yellowing leaves and black leaf parts on alocasia

info alocasia plant bought from a nursery placed in a well-lit corner of the room, without direct sunlight plant is not over-watered, only watered when soil dries got it for about 3 weeks now issues ...
1
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1answer
190 views

White spots on cactus

I’m fairly new to gardening but purchased some cactus’ last year. I noticed one started to develop a white spot on the side of it. I isolated this cactus into its own pot. Any idea’s what it is or ...
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0answers
173 views

What are these spots on my new bamboo palm?

Hi all! I’m new to gardening and want to know what’s going on with this palm I just bought from the Home Depot. There are white spots near the roots that look like fungus to me, brown spots higher up ...
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1answer
822 views

Wounded rhipsalis hanging cacti

I need advice caring for my hanging cacti. I think it's rhipsalis lepismium bolivianum? It's started to develop black patches along its limbs. Also some weird spots. And some white muck gathering, ...
18
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4answers
4k views

What else besides calcium deficiency could be causing tomato blossom end rot?

I've been using "Tomato Maker" (4-2-6) fertilizer, which supposedly has enough calcium to prevent blossom end rot, but I'm still getting blossom end rot on my super marzano tomatoes (no BER problems ...
2
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1answer
62 views

Is my tree diseased? Can I cure it?

I have a two-year-old apricot tree about six feet tall growing in a salvaged water tank. Many if not most of the leaves have one or more of little "blisters" on their stalks, as shown below (each ...
2
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0answers
33 views

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 ...
2
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0answers
34 views

Whats wrong with my Basil sapling?

I live in Pune, India. The weather these days is like Temp: 15 to 30 deg C, Humidity: 30 to 60%. The sapling bought from a local nursery a month ago, the plant is kept in the shade. We water regularly,...
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0answers
17 views

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.
5
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1answer
249 views

What caused this grass to die and how can I treat it

Trying to identify what has happened to my lawn. The first image with the long stripe was irrigated well so I don't think this is drought related. This is a Florida lawn with St Augustine and ...
2
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0answers
11 views

What is wrong with pedilanthus?

I live in Uttar Pradesh, India and I have planted pedilanthus in my vertical garden. They are in bright indirect sunlight. Their tips are turning pink and there is also some white fungus. What should ...
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0answers
53 views

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 ...
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1answer
29 views

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.
5
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1answer
638 views

My lemon tree has not grown for the last few years and has remained stick thin. Can you help me revitalise it?

Unfortunately this lemon tree hasn't grown for the last 3 years when it was planted. Its situated on the north side of the house and should have plenty of sun although it's winter now in Melbourne. ...
3
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0answers
39 views

Buxus sempervirens - Deformed leaves

Can anyone help me? Suddenly my Buxus sempervirens appeared with the new shoots with deformed leaves. I'm in zone 9. It has not been cold though, and yes, it's a lot humidity every night.
2
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1answer
2k views

Why did my hibiscus flower size reduce?

My hibiscus plant used to give really big and yellow (dark pinkish almost magenta shade in centre) flowers but after a month the leaves began to curl inwards and the buds started to fall off before ...
3
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1answer
2k views

messy curry leaf plant

Couple of questions, 1) The leaves doesn't look very healthy, any idea what might help them? 2) What bugs are these? they are making a big mess, how to get rid of them?
3
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1answer
80 views

Peach root fungus?

Could someone recognize the disease in these peach tree roots? The smell is hard to describe but it's definitely not pleasing.
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2answers
58 views

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?
5
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1answer
276 views

How to recover a stressed hemlock?

I have a well-established hemlock tree in my yard that has started producing large quantities of cones. This is apparently a result of it being "stressed" (according to a nursery worker and a tree-...
3
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0answers
48 views

Why aren't my year-old apple seedlings thriving?

I planted a variety of seeds from apples from a local orchard. They have been growing for almost a year. They are about 8" and have suffered aphids and a white powdery fungus. I have sprayed plants ...
3
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1answer
206 views

Unhealthy orange tree

Our young orange tree (planted in the spring) has been healthy but growing slowly. I’ve noticed light blue spots on the leaves (EDIT: upon a second look, I realized that the spots are really white, ...
4
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1answer
164 views

Orchid has browning foliage. Can you help diagnose the problem?

My Phragmipedium is showing some symptoms. I am wondering if it is a nutrient deficiency or disease. I water them once a week and with the occasional ice cube that doesn't touch the foliage. ...
2
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0answers
52 views

What type of disease is my rose suffering from?

Can anyone help me identify what disease is infecting my rose canes as shown in the attached photos? Thank you Janice
2
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1answer
103 views

Is this some viral / disease on my plant?

I planted this 4 weeks ago and now I see that the plan developed a couple of these spots as you can see in the picture.
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0answers
642 views

Why are my potted outdoor Plumeria leaves turning yellow and brown?

All the leaves are yellow, with red around the edges and then eventually start turning brown?
4
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1answer
108 views

Agave is sweating

It looks as if my agave is "sweating" a crystalline substance. The droplets are approx. 2 mm in diameter and twice as long. Is this as it should be (also the surrounding yellowish patch in the ...
2
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0answers
39 views

Magnolia leaves browning and falling

My Kay Paris Magnolia has browning leaves, which ultimately fall off. I also notice spotting on the leaves. Neighboring trees have a scale problem, but not much on this tree, which I also put white ...
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6answers
7k views

Are my tomato plants damaged by a chemical or a disease?

Most of my tomato plants have started showing signs of what I think is Cucumber Mosaic Virus. I have shoestring, fernleaf, and curling leaves. They also have a leathery appearance. At first I thought ...
3
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0answers
78 views

Black spot on leaf of cardboard cycad (zamia furfuracea)

I live in Korea. I think that my precious cardboard cycad has some problem. Where the plant came from? I purchased cardboard cycad on the internet. It was delivered in 36hr. When it was delivered, ...
5
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1answer
486 views

What is this disease is this on my basil and mint?

I have a mint and a basil right next to each other. First the mint and then the basil developed a similar leaf disease. Any advice is appreciated.
3
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0answers
39 views

Pineapple leaf discoloration?

Can some tell me what’s going on with my plant? I have not done anything different and this started when we moved it inside.
3
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1answer
214 views

Is this oak powdery mildew? How can I manage it?

I have just bought a new property that has a range of oak trees. Unfortunately, I noticed that some of the young trees in one area have a white discolouration of the leaves. After some searching ...
3
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1answer
1k views

Webs, black spots, and dying leaves- what disease is inflicting my plants?

I'm trying to identify an plant disease that has infested my sage, rosemary, and oregano. The plants have have a few webs on their leaves and there are black dots all over the plant, which don't seem ...

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