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Questions tagged [diseases]

For questions related to plant diseases.

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1answer
28 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
13 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
33 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, ...
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0answers
26 views

Black spots on echeveria leaves - cause?

Activity on 28-01-2019: Watered - soil is damp as of 29-01-2019, but it is a fast-draining cactus mix. Pest control - sprayed 2~3 times with pyrethrum bug spray (brand below) Fertilized - about half ...
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0answers
25 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 ...
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0answers
16 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.
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0answers
13 views

What’s wrong with my aloe Vera

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
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0answers
9 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
18 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
23 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.
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0answers
29 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.
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1answer
30 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 ...
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1answer
56 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?
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1answer
36 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
49 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?
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0answers
26 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
56 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, ...
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0answers
44 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
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1answer
47 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
38 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?
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0answers
13 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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0answers
33 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, ...
2
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1answer
69 views

Are black spots on Areca Palm contagious to other flowers?

I read here that those black spots caused by either bacteria of fungus aren't bad for my Majesty/Areca palm, but are they bad for other flowers which will be next to the palm? Will they become ...
3
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1answer
66 views

How can we save the trees in our historical garden from dying?

Our historical building is located in a big garden with 2700 pine trees in Khaf city, Iran, and about 300 trees have died. Is there anything we can do to save these huge trees? Khaf city has warm ...
4
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1answer
59 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.
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0answers
25 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.
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1answer
57 views

Can These Plants Be Saved?

I believe the more dead one is sage. How should I help it? Also the plant with brown ends on the stems is mint. Should I cut off the brown bits? I don't care about harvesting or eating them I mostly ...
3
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1answer
43 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
87 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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0answers
16 views

Magnolia not flowering well

My Magnolia ‘Vulcan’ flowers are not looking right. Attached photos are all new growth (in Australia, just entering Spring). Any thoughts as to the issue?
2
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2answers
81 views

What illness/pest has this dipladenia and what to do with it?

I've successfully rooted 6 dipladenias 4 month ago, they are in pots since 3 month. All went well so far, but now it seems they have some illness or pests. (All the six, although in different progress)...
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2answers
85 views

What are these raised brown sections on the backs of the leaves on my pear tree?

I have this brown stuff growing on all the leaves on my pear tree in my garden. Does anyone know what this is? I think it might be some plant disease. Does anyone have any advice on fixing this?
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0answers
19 views

My song of india plant have these light brown spots. What are they? [duplicate]

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.!
3
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3answers
69 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. ...
3
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2answers
68 views

How to tackle this disease on an apricot tree

We live in Vienna, Austria, very near the Danube river. We planted this apricot tree back in spring of 2015 as a small tree bought from a local nursery. It has been growing very quickly and was ...
2
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1answer
41 views

Camelia with virus?

What is the problem with this white camellia? Some leaves are getting completely yellow but the plant is generally very vigorous. Is it virus? Is there a treatment?
4
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1answer
54 views

What’s happening to my grapes?

Just in the past week, just as my grapes are ripening, this powder is showing up on some of them, and some of the green stocks are showing some brown. What’s wrong and how do I fix it? The vine is ...
2
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1answer
34 views

What is this disease on my carrots?

I have just discovered that some of my carrots have this very dense presence of insects. Are they aphids? I have learned recently that ants love to grow aphids and I could notice some ants around ...
7
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2answers
2k views

Why do my Cherry tomatoes split as they ripen? [duplicate]

It doesn't matter what I do, my Cherry tomatoes always seem to have many of them crack when/as they ripen. I have tried everything - more sun, less sun, more water, less water, different varieties etc....
2
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1answer
38 views

Who is bugging this Deutzia Gracilis?

The depicted Deutzia Gracilis has apparently begun suffering from some kind of invasion. Who is bugging it (probably aphids) and how can this be fought off (preferably without "strong" pesticides)? ...
4
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0answers
117 views

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 ...
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1answer
144 views

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 ...
4
votes
1answer
82 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 ...
3
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2answers
68 views

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: ...
2
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1answer
52 views

Leaves are dying slowly on Raspberry plant-what on earth is wrong?

I am in desperate need of some help. I have been trying to figure out what is killing my Raspberry plants and have come up with nothing so far. Let me give some background information that may be of ...
4
votes
1answer
81 views

What are the little white eggs on rose leaf?

Somes weeks ago rose food /w bad things killer was sprinkled on the ground. The three roses were, just a little over a week ago, hacked back for better access to attempt to clear myrtle that had ...
4
votes
1answer
59 views

Is this the cucumber mosaic virus?

We tried growing cucumbers in our backyard near San Francisco, California for the first time this year and have had all sorts of problems. We had to remove three cucumber plants because they seemed to ...
4
votes
1answer
514 views

Why has 20% of my pumpkin plant suddenly died and how can I save it?

So I had a thriving Pumpkin plant. For about a couple of weeks the big leaves in the middle of the plant (so the oldest leaves) started to yellow and get crisply on the edges. We've had 90 to 100 ...
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1answer
422 views

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 ...