Questions tagged [diseases]

For questions related to plant diseases.

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0answers
24 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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16 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
46 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
23 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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0answers
15 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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0answers
10 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
17 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 ...
2
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1answer
32 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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0answers
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
35 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
18 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 ...
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1answer
278 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
17 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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1answer
18 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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28 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
14 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?
2
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1answer
37 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
24 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
22 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
28 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
31 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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0answers
12 views

Deformed leaves on Buddha Hand citron

What citrus disease is this? I picked up the very last Buddha Hand Citron from the store, so I couldn’t choose a better looking plant. Its leaves have wavy contours and the inside is bubbly. I don’t ...
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0answers
31 views

What is ailing my tomato plants?

My tomato plants have suddenly developed a nasty case of something or other: What is it, and how, if at all, can I rescue my plants?
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0answers
9 views

Orange blotches on my mango leaf

My mango leaves having the following condition: Example 1 Example 2 Example 3 The leaves start off with this grayish bluish blotches which turn into this bright orange. Is this due to some fungal ...
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1answer
36 views

Parts of pepper leaf became watery in after a cold and wet day

It has been cold(50F) and rained quiet a bit today and yesterday. One of my pepper plant's leaf have become "watery". parts of the leaf is wet and soft to the touch and slightly transparent, ...
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1answer
36 views

What is this growing in the soil of indoor plant?

What is the yellow thing protruding from the soil? Should I dig it out? Also there appears to be white mineral deposits at the top of the soil This is an indoor aloe vera plant in a pot.
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22 views

Did I damage my tomato blossoms by spraying them with neem oil?

I had aphids and spider mites so I bought a premixed neem oil and sprayed my tomato plans. I didn’t know to avoid the blossoms and now they’re starting to wither. Did I damage them? Will they bear ...
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2answers
50 views

Black spots on Fatsia japonica

does anybody have an idea about these small black spots on a lower leave of Fatsia japonica?
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2answers
25 views

Is this black spot on roselle leaf fungal?

I have had one leaf which had two of these black spots. Now this is the second one where I have one blackish spot (Pic 1). Is this due to fungi? It seems to be embedded in the leaf. Otherwise, in two ...
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0answers
35 views

What's happening to my Marigold plant?

I sowed seeds for Marigold (purchased from Home Depot) and used Miracle Pro potting mix. The seeds germinated quickly and my plant grew 6-8 inches. From past 10 days, I am seeing the peripheral leaves ...
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1answer
18 views

White spots growing on shrub

I've recently noticed some white spots growing on the branches of the shrub in my garden. May I ask what they are and what should I do about them? Thank you in advance.
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0answers
30 views

Is this image shows my strawberry plant have Leaf Scorch fungus infection?

I have brought new strawberry plants, they seem to have black dots even for green leaves. I can see a lot of dead leaves with these marks, is this a fungus infection? Based on my research is Leaf ...
6
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1answer
533 views

Does it make sense to spray a soccer field for ticks?

I work at a school in an area with a high incidence of tick-borne diseases (even the one that makes you allergic to red meat!) and some parents have asked the school to spray the grounds for ticks. I ...
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0answers
28 views

Suspecting pear fireblight but not sure.Any help appreciated

We have several fruit trees in our garden but having fruiting problem only with a pear tree.It is maybe 8 years old, every year has fantastic blossom but after the flowers turn into tiny fruits they ...
2
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1answer
56 views

Unexpected wilting and leaves curling in a serrano pepper plant

About 5 days ago, I noticed that one of my 5 serrano pepper plants that a planted in a 10l container started to wilt a bit with some leaves that started to curl. After searching on the internet, I ...
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1answer
17 views

Is large vertical crack on the trunk of a shrub a sign of disease or old-age, and can this be reversed?

I just noticed one of my shrubs in the garden has a huge, vertical crack spanning almost the entire length of the plant. This plant has no issues and had a lot of foliage in previous years. Is this ...
2
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1answer
18 views

Fungus cross infection

My Dendrobium Nobile Apollon has fungus ... Is it possible that this fungus could infect other plants like my Hoyas?
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0answers
7 views

Need help with identifying peace lily root disease

My peace lily started dying, it's leaves were turning yellow and then brown from past 2-3weeks. I speculated it to be a root rot. Today, I took out the plant from soil and along with root rot, I found ...
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0answers
23 views

Please tell me the disease/issue with my mint plant

These mint leaves are pale yellow-green. Please tell me what is wrong with them with all the discoloured appearance. Pot-12~14 inch Soil mix-Old vermicompost~vermiculite~perlite mixed with about 20 ...
2
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1answer
23 views

Pawpaw bark damage after first winter

Young pawpaw tree (planted last spring as a stripling, so first spring post planting) has damage to bark and trunk. What could have caused this? Is there anything I can do to help it? Tree is in a ...
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0answers
32 views

Is this a citrus disease I should worry about or contact the gardening authorities

I came across a kumquat the other day that was delicious, so I took some cuttings (with the permission of the owner). the fruit still on the tree was completely unblemished; however, I'm unsure as to ...
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1answer
49 views

Are these potted mint plants healthy?

These are some mint plants (Mentha arvensis) that have been grown from grocery store edible mint stems planted in a 60~40 ratio of cocopeat-perlite-compost and garden soil. The new leaves around the ...
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0answers
16 views

Yellow/Brownish bottom leaves in Cycas revoluta

I have a Cycas revoluta with bottom leaves with yellow/brown spots. I guess it's probably related with overwatering. However, the pattern that I saw in internet pictures was a bit different. So, it ...
3
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0answers
38 views

Little indentations on tea plant

I spotted these on 2 new leaves of my camellia sinensis, the other leaves don't have these at all, its inside against a western facing window, watered every 4 days fertilized every 2nd month, I want ...
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0answers
22 views

Is this a disease?

I have planted a curry leaf sapling taken from a local nursery in a 10 inch pot in fresh store bought potting mix (cocopeat, perlite, vermiculite, sand, rice husk, vermicompost, neem extract). I put ...
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1answer
37 views

Small brownish spots on succulents | how to cure?

What disease/fungi/insect is causing this and how can I get rid of it? thanks in advance!
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1answer
44 views

How to help seedlings recover from tip burn

I germinated some seeds and I had the seedlings under a two new 40w LED grow light for a few weeks. I'm used to keeping florescent lights very close to the plants, but apparently this LED light is ...
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1answer
36 views

What caused the roselle seedlings to emerge like this?

I had planted some roselle seeds in a seed tray with an old mix of cocopeat, perlite, vermiculite and compost. The seeds were soaked in water before planting for some time. Now after eight days or so ...

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