Questions tagged [diseases]

For questions related to plant diseases.

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25 views

What causes boxwood hedging to lose its leaves in the UK's winter months?

Boxwood is supposed to be an 'ever-green', yet in the UK it's becoming increasingly noticeable over the past few years how they shed their leaves, especially on the top surface, over the winter months ...
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0answers
17 views

Should I treat soil after slime flux?

I inherited a tree that suffered from slime flux (bacterial wetwood). It had sores on the trunk that oozed liquid and foam, and the run-off created a smelly puddle at the base of the tree. The stink ...
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1answer
29 views

What's wrong with my citrus?

First two are a lime, second two are a tangerine. Both of these have done well in previous years. The lime is especially bad it does not seem able to add new leaves, and the existing leaves have ...
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1answer
30 views

Aloe vera plant has rot deep in the leaf, and is looking wilted

I've had this plant for several years. Last summer I replanted it. It seems to have significantly wilted over the past few months. The leaves used to reach for the sky. A healthy leaf had fallen out ...
3
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1answer
19 views

How to treat black stem-tips and leaf-veins in Mango?

The plant in question is a Mallika grafted onto Gomera. It is planted in a fabric pot with general purpose potting soil and resides outdoors in a sunny spot while being protected from the rain. ...
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1answer
45 views

Flamingo flower (Anthurium) dying: three years on

After a few months of neglecting my plants (only watering and not checking for health problems) I noticed the anthurium is not doing too well. The youngest leaves are withering back, and there aren't ...
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1answer
39 views

Bring wilting plant back to life

I don't know what kind of plant this is. A few months ago it started to wilt. If I watered it it seemed to get worse, so I cut way back on watering. The past two weeks I didn't water at all, then I ...
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0answers
18 views

Walnut Sapling Stem Getting Black

I am worried about this walnut sapling. It was replanted last month and look healthy, hewever, I noticed the lower part of the stem got black. I am worried that the sapling might die. What is causing ...
3
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1answer
49 views

What are these white hairs on the underside of water spinach leaves?

I am growing water spinach (Ipomoea aquatica) under grow lights indoors. Most of them seem to have white 'hairs' growing on the under side of the leaves. The cotyledons don't seem to be affected. I ...
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33 views

Why do the Walnuts of Our Trees Get Black and Could Not Ripe

We have a cottage in a very close proximity to the Black Sea (around 2 kilometers) in what is referred to as a Temperate Climate Zone environment. We have 3 old walnut trees that give a fair amount of ...
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Hydrangea got these brown dried spots

So I planted this hydrangea and it has these brown dried spots. Please let me know if I need to add/spray anything or simply sniping it of or ignore it. Im located in south Jersey Soil is clay but was ...
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How to detect Mosaic virus infestation in Hippeastrum seedlings?

If a seed was harvested from an infected Hippeastrum plant, it may happen that by handling the seed pod a virus was transferred to the seed while handling the mother plant and then touching the seed. ...
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0answers
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Healthy leaf fell off aloe vera plant. Looks like there may be some mold

I transplanted an aloe vera into a larger pot a couple months ago. I used cactus soil. Suddenly a leaf fell of it. The leaf had looked healthy and was green and plump. Upon looking closer I can see ...
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0answers
16 views

Whats up with my hydrangea

Im located in south Jersey Soil is clay but was amended with leafcompost, micronutrients stuff and topped with 4" woodchips. Only watered it when planted and monitored the moister level before ...
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1answer
68 views

My plant is sick, what can I do?

This plant used to be green, since a year ago it's mostly yellow (most but not all of the leave is yellow) and stopped growing - even shrinking a bit. I suppose it has a disease. But I don't even know ...
6
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1answer
55 views

What is this disease attacking the leaves of most of my plants?

more than half of my plants (total about 100, from a wide variety of plant families, all on a large balcony) are affected stems, roots, flowers and fruit show weak growth but no direct sign of the ...
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0answers
22 views

What are the issues plaguing my lemon tree and how can I bring it back to glory?

Have just moved house and have a lemon tree that appears to be suffering from numerous issues. What exactly is causing the issues seen in the below pictures, and how can I effectively treat them? I've ...
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69 views

Why are leaves on my plant drying and have white spots?

I have a plant (I don't know what kind of a plant is it) which used to be in the hallway of the building I live in. I didn't really take good care of it and most of the leaves dried up and fell off. A ...
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0answers
19 views

Will Grow bags prevent soil pathogens from seeping into the bag from underneath?

I have an organic raised garden bed for tomatoes. Unfortunately a soil pathogen/fungi has damaged several of my plants this year. I could not find an environmentally safe way to treat soil pathogens ...
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2answers
18 views

What are these spots on my begonias' leaves?

My begonias aren't doing so well. They've developed spots on the leaves and it seems to be getting worse. I think it's some kind of disease, but I can't find a close enough match online to be sure. ...
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15 views

What would cause cherry tree leaves to dry from middle outward?

I have a 3-year-old cherry tree which is losing its leaves early this year. They appear to be drying and wilting from the middle (large vein) outward. What would cause this? Notes: Located in ...
4
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1answer
62 views

Why are my cucumbers deformed?

I'm growing a pickling variety of cucumber. Normally they grow in very predictable "pickle" shapes. A couple of weeks ago, I notice that most were oblong and sort of hooked. In the photo ...
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16 views

Immediately browned leaves on coral bark maple

Four months ago I transplanted two young maple trees, a coral bark and a Japanese, from nursery pots to larger pots. I went on vacation and the automatic irrigation did not trigger. Both scorched, ...
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167 views

Does my basil have fusarium wilt?

my basil has browning leaves and a dark stem and Im worried it has fusarium wilt! I only bottom water it every time it droops and keep it beside a semi sunny windowsill. It does live in a not so well ...
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0answers
37 views

Marigolds, clovers, and other plants have leaves mottled with white

I noticed our marigolds all seem to have some sort of leaf-mottling, but since they seem otherwise healthy (perky, blooming), I wasn’t too worried about it. But I’m noticing the same thing has ...
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0answers
21 views

Mango leaf disease

My mango plant has various symptoms so I'm not able to pinpoint the disease. Is it just a result of anthracnose or is it a lesser problem? I sprayed some Bonide copper fungicide. Is there a better ...
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0answers
24 views

What are these spots with yellow halos on my cucumber leaves?

They've been growing for 3 months so I assume they're at the end of their lifespan- but I want to identify this. Is this a disease or just some sun beating down on it?
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0answers
44 views

Why are cucumber leaves turning yellow and white and dying off?

My cucumber plants have leaves that are turning yellow and white and dying off. I've had trouble with a virus in the past, but this looks a little different. Any ideas?
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0answers
20 views

What could be causing these bands of discoloration on my grass leaves?

My lawn was replanted from seed last fall, and has been looking generally good this year, though the overall color seemed a bit lacking recently. Upon closer inspection, I found that throughout the ...
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17 views

Two potatoes in container are bad -- are the remaining potatoes affected?

I'm growing potatoes in containers. I just turned out one container to harvest the potatoes. Two of the potatoes were gelatinous and foul, as in the photo: Update: these weren't the seed potatoes, ...
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1answer
57 views

Half of a zucchini fruit is yellow. Is this a reason to worry?

So, one side is nice green with white dots as usual, but the other side (the side on the less blurry part of the picture) is yellow instead of green. Is this some disease? I've gotten normal looking ...
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1answer
29 views

How to treat lawn diseases (brown patch, leaf spot, melting) without fungicides?

Google tells me "stress your lawn", meaning cut the water for some time. But wouldn't that hurt it even more, given we are in mid summer? I live in Calgary, AB - Canada. Fungicides are a no-...
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23 views

Why is the top part of the stem on my umbrella tree turning soft and different colors? And the leaves have brown ish spots on the new leaves

Help! I got this umbrella plant just a little while ago and it did have aphids (I did get rid of them). After them, the plants condition has gotten worse! The upper part of the stem is extremely soft ...
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13 views

Can someone tell me what’s wrong with my foxtail palm?

I have a double foxtail palm tree with one of the trunks showing signs of disease. Can someone tell if this is treatable and how? Thanks a bunch
3
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1answer
25 views

Lemon Meyer - unidentified disease

my young Meyer lemon tree has been growing something I though was bark. However it is not bark but brown spots with tiny white dot in the middle. They come off easily as you can see some of them on my ...
4
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1answer
63 views

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 ...
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16 views

Can't identify tomato spots

I've looked through tons of tomato problem pictures, but I can't seem to find any that match my problem. The plant is a Big Boy variety and seems (to my mostly untrained eye) quite healthy (it's about ...
2
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1answer
126 views

Why the leaves of the Barbados cherry plant are turning yellow?

The leaves of my seven month old Barbados cherry plant are developing pale yellow spots, which then spread till covering the entire leaves. The spreading of the yellow spots to cover an entire leaf ...
2
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1answer
24 views

Lilac Bush - A parasite of some sort? How to treat?

This is related to this post, I'm having the same issue: spiny growths on lilac bush (Colorado) There is something growing from my Lilac Bush that isn't the Lilac itself. It grows directly out of the ...
4
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1answer
302 views

What is causing the brown streaks and holes in my young cherry blossom tree's leaves (Ireland)?

My cherry blossom tree was just purchased in April, and it's about 2-3 years old. It gets decent sun for at least 4 hours a day on sunny days but not every day, and lots of rain (I live in Ireland). ...
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0answers
21 views

Weird spots on my cactus

My cactus has significantly grown over the past few weeks and iv noticed these weird spots on it, it’s spreading around it. Dose anyone know what it could be or how to treat it?
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2answers
34 views

How do I tell the difference between fungus and natural coloration in zucchini?

I've read that white patches on zucchini can be natural, powdery mildew, or another fungus. How do I know which? 2 of my zuchinni have large patterns of white areas on all leaves older than about a ...
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0answers
35 views

Why are my raspberry floricanes dying?

I have a good size raspberry patch in my yard that was there when I bought my house, and for the first 2 years I lived here I got a ton of raspberries. Starting last year, early in the summer, the ...
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1answer
30 views

What are these brown spots on my sweet peppers (fruit)?

This has just happened in the past two days. I accidentally smeared wet dirt on them while tending, but surely this isn't a result of that?
4
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2answers
52 views

What are these light green spots on my tomatoes?

I saw this in nearly all of the old growth. In researching this I found that it could be eggs of a leaf-miner, or simply just sun damage. I wanted to confirm if this is something to worry about, and ...
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0answers
10 views

Why is my Black Locust dropping spotted leaves?

I have a Black Locust tree that has been planted for 1 year. It has full sun and as of this Spring I have watered it every other evening for 20-30 minutes. It has grown significantly the last few ...
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0answers
27 views

Leyland Cypress dieback

Approx 3 years ago I planted a row of 13 Leyland Cypress as a screening hedge at the back of my garden (London, UK). Over the years the trees have been growing well and have approximately doubled in ...
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1answer
30 views

Cat Palm in the early stages of death?

I’m worried about my cat palm. I got it maybe 6 weeks ago. I repotted it within a few days and seemed to be ok. Its growing new fronds but I noticed a couple of leaves at the bottom went a bit yellow ...
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1answer
31 views

Sweet potato - wrinkled leaves

I'm getting some leaves wrinkled. Is there anything to worry about? Or it's still ok? Slips were wrinkled as well, directly growing from tubers, but now that effect becomes less visible on new young ...
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1answer
42 views

What's killing my apricot tree?

bought my house a few month ago, the apricot tree in the garden seemed fine at first and I thought it would be ok because a lot of buds appeared early, but now it seems to be dying. Do you think it ...

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