Questions tagged [diseases]

For questions related to plant diseases.

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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 ...
Sue Will's user avatar
  • 106
6 votes
1 answer
119 views

Mysterious anthurium disease…

My friend has just acquired this beautiful Anthurium wendlingeri for me! Sadly it had some scales and mealy bugs, which I’ve already washed off… but there is also this very strange damage: What kind ...
sunnylaraa's user avatar
6 votes
0 answers
38 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?
brandon's user avatar
  • 513
6 votes
0 answers
36 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 ...
Janko Bradvica's user avatar
6 votes
0 answers
675 views

What disease is affecting my Dypsis lutescens?

I received this Dypsis lutescens (palm) plant as a gift last spring, it had only two leaves and it was potted in nursery soil with sand. Recently I have noticed that the outer leaf started to form a ...
Alina's user avatar
  • 5,416
5 votes
0 answers
31 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 ...
kial's user avatar
  • 51
5 votes
1 answer
98 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 ...
Georgia's user avatar
  • 51
5 votes
0 answers
47 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?
crmdgn's user avatar
  • 827
5 votes
1 answer
845 views

Black spots with white ring around them on Zinnia leaves

We have grown Zinnias in our garden since 3-4 years, In South India . The initial batches were very healthy and robust ,with stunning flowers. but since the last 1 year or so I have noticed that the ...
Amarylis Vaselaar's user avatar
5 votes
0 answers
486 views

What's wrong with my fairy castle cactus?

My cactus used to be really thick and dark green but now it's so much skinnier and starting to shrivel up. Some of the arms are turning a dusty kind of brown and they're all leaning away from the stem ...
Bob Brown's user avatar
5 votes
0 answers
89 views

What is this foliar/fruit disease on our pear trees?

This year both of our pear trees (especially our dwarf Bartlett) have a new foliar disease that I've never seen before. It looks a lot like edema with the bumps, but with a lot more discoloration and ...
Brōtsyorfuzthrāx's user avatar
5 votes
0 answers
1k views

What are these barely visible white spots and brown edges on my citrus plant?

I have a citrus plant and something else growing in a pot. The something else had some barely visible white mold-like spots for a few months, and now its and the nearby citrus plant's leaves are ...
user1306322's user avatar
5 votes
0 answers
380 views

Globe Willow keeps going into shock

I live in Northern Arizona and globe willows do really well around here. However, I am having the opposite problem. Mine has went into shock twice this year. The first time I trimmed the dead branches ...
Jason Dykstra's user avatar
4 votes
0 answers
105 views

Strange growth on a pepper plant

I noticed a strange growth on a Capsicum chinense plant. Based on location I believe, it is is some sort of deformation of the flower bud (maybe fasciation). It resembles broccoli florets. No other ...
user37509's user avatar
4 votes
0 answers
179 views

Dragon Fruit developing translucent areas which then turn tan/white

I have two dragon fruit plants which were started from healthy cuttings. The new growth segments have developed an odd thing which I can't figure out when reading up on problems and diseases. Along ...
jeremy simon's user avatar
4 votes
0 answers
36 views

Nest like structure in Japanese Blueberry tree

I recently planted a Japanese Blueberry tree and it seems to be under a bit of stress(dropping leaves) from the transplant. Today I noticed the nest structure shown in the images below. I am thinking ...
Mike's user avatar
  • 95
4 votes
0 answers
78 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 ...
Hinko Pih Pih's user avatar
4 votes
0 answers
156 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 ...
Amaya Marshall's user avatar
4 votes
0 answers
50 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?
Louise Millar's user avatar
4 votes
0 answers
77 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 ...
Jithin Jose's user avatar
4 votes
0 answers
149 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 ...
Kay's user avatar
  • 41
4 votes
0 answers
93 views

Why are the leaves on my mango seedling turning brown?

Also the tiny new leaves (on the top of the plant) are falling off right after they pop up. Then the plant grows new ones and they fall off again. Is it because of overwatering? I also recently had a ...
Mancato Il Dottore's user avatar
4 votes
0 answers
32 views

What are these gall like growths on my spuds?

I noticed a volunteer potato plant in the garden a month or so ago which I thought was cool. It's just now at the tail end of winter in the southern hemisphere. Today I noticed that it had gall like ...
Graham Chiu's user avatar
  • 23.2k
4 votes
0 answers
50 views

Squash vine stopped growing?

I've seen this on several squash plants, where the vine seems to stop growing but the growth tip is still trying to produce fruit. Not sure what this is called - internode shortening or something? ...
engil's user avatar
  • 163
4 votes
1 answer
106 views

Chilli plant leaves disease

My chilli plant leaves seem to get some white shiny spots on them and then go brown and die off. The pics don’t look like anything I’ve seen from googling; is it rescueable? Thanks! Malcolm
mlflatcoated's user avatar
4 votes
0 answers
180 views

What wrong with my cactus

Ive had this cactus which i think is a Pachycereus Schotti/Monstrosus since years and its been growing fabulous. Ive just recently noticed it acquired some brown scales (non Insect) and looks like ...
Desertbum's user avatar
4 votes
0 answers
182 views

No leaves on tree tops. What’s wrong?

I’ve got two trees that didn’t get leaves on their tops. Should I be concerned? One is a twisted baby locust and the other is a scarlet oak tree. It did get really warm here and then freeze in the ...
thecoolmacdude's user avatar
4 votes
0 answers
802 views

How to diagnose brown spots on dogwood leaves

We have a pink dogwood that was planted two years ago. Its leaves all have brown spots, and some leaves are quite covered with brown. It is more pronounced this year than last year. From research ...
LarrySnyder610's user avatar
4 votes
0 answers
197 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 ...
Natalie Steele's user avatar
4 votes
0 answers
43 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 ...
lithiumhead's user avatar
4 votes
0 answers
59 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.
Maria's user avatar
  • 351
4 votes
0 answers
56 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 ...
Diane Hammond's user avatar
4 votes
0 answers
802 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?
Lynn's user avatar
  • 41
4 votes
0 answers
186 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, ...
paganinist's user avatar
4 votes
0 answers
78 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.
FELECIA DIXSON's user avatar
4 votes
0 answers
29 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?
Simon E's user avatar
  • 733
4 votes
0 answers
389 views

Can someone identify Desert Rose Leaf problem?

I bought this Desert Rose from a big box store on clearance about a month ago. The leaves had this trailing/patchy lighter discoloration on the leaves when I purchased. Thought I could re-pot it and ...
Raesunrae's user avatar
4 votes
0 answers
145 views

How come my majestic palm has patchy dried out spots?

This is an indoor pot plant. We have quite a bit of natural light thanks to a skylight, but not much direct sunlight unfortunately. The dry patches have been there for a while and I’ve tried various ...
Cisiko's user avatar
  • 41
4 votes
0 answers
4k views

What are the white and black spots on the under side of my chilli leaves?

I am a newbie to gardening and was so chuffed to see my chilli (the plants are Chile guajilo and Chile chipotle) plants grow up. However, I have noticed leaves starting to fall. These leaves have, on ...
Pallavi Chaudhari's user avatar
4 votes
0 answers
41 views

How effective is a phosphonate treatment for phytophthora dieback?

I found on the Internet that the fungal disease phytophthora dieback can be treated with phosphonates. I am asking how effective this treatment is. If it's not very effective, is there any other ...
Durgadass S's user avatar
4 votes
0 answers
1k views

What causes dark brown spots on guava fruit?

I am from India and I see that young guava fruits have dark black/brown spots on them. I grow them at my home. I have attached photos of the fruits. Could someone help in identifying the disease and ...
Krishna P S's user avatar
4 votes
0 answers
3k views

Is this bay tree dying?

This tree has just recently got these marks on all the leaves and there's no new growth this year. I'm afraid it's dying but is there anything I can do?
conorgriffin's user avatar
4 votes
0 answers
996 views

What is this substance that looks like red sap on my cucumbers?

I have this weird red sap on a few of my cucumbers. I was wondering if anyone has seen this before? These cucumbers were grown in our conservatory in the back garden (facing south) in pots, grown up ...
Michal Paszkiewicz's user avatar
4 votes
0 answers
152 views

How to keep cucumber beetles/bacterial wilt from spreading when removing infected plant?

I have some cucumber plants that are very infested with cucumber beetles (mostly striped, some spotted). The plants are dying from bacterial wilt, and although it's hard to access all leaf surfaces ...
NeutronStar's user avatar
4 votes
1 answer
409 views

What's wrong with my plants

I've recently bought Cestrum nocturnum from local nursery and transplant it in pot with 40% sand soil, 40% organic compost and 20% coco peat. But I don't know why its leafs are falling continuously. ...
Uzair Ali's user avatar
  • 141
4 votes
1 answer
2k views

Kiwi Actinidia arguta Issai black spots / patches on younger leaves

I bought 2 mini kiwi plants (Actinidia arguta Issai) online. It was delivered from Netherlands in case that matters. They are growing well except for black spots that seem to be spreading a little ...
DominicM's user avatar
  • 273
3 votes
0 answers
69 views

Avocado tree wilting indoors

My indoors avocado plants have been looking worse and worse over the past couple months, even though they are receiving plenty of sun (summer in Australia). Their leaves have been drooping, becoming ...
Clement C.'s user avatar
3 votes
0 answers
32 views

Large white marks and curled up basil leaves

I’ve grown this plant from seed indoors under grow lights. Potting mix is ProMix organic. They looked great at first but then started developing these white marks and the leaves started curling up all ...
Seb's user avatar
  • 31
3 votes
0 answers
24 views

Nyssa sylvatica - Identify possible disease?

Region is Pacific Northwest (Portland) We have a 12 ft tall Nyssa Sylvatica that's showing significant brown leaf spotting that is worse the higher you go. Photos are below. Last year, while still ...
Jim Garrison's user avatar
3 votes
0 answers
21 views

Diagnose illness in dying watermelon vines

It seemed to me that I had a nice health crop of water melon plants growing. Then I noticed the leafs developing brown spots and start to get brittle dry out, with some brown spots eventually turning ...
vegfarm-edward's user avatar

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