Questions tagged [diseases]

For questions related to plant diseases.

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4
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1answer
2k 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 ...
1
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1answer
2k 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 ...
1
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1answer
313 views

What is this disease with sticky transparent liquid and brown spots on leaves?

here is a picture of the plant, a shefflera. It has some very sticky transparent liquid on many leaves, and also brown spots. The spots themselves are kind of "dry" and mostly located at the leaves ...
0
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1answer
74 views

What's causing dry crispy leaves on Vaccinium Membranaceum?

I'm in the Willamette Valley in Oregon, USA, (USDA zone 8b) and I have a Vaccinium Ovatum, Vaccinium Parvifolium, and a Vaccinium Membranaceum in a section of my garden. They're shaded up until noon ...
0
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1answer
267 views

Basil leaves are scarred and wrinkled

My indoor basil plant has developed some scarring and has some pretty deformed leaves. Could it be due to the caterpillar that chewed up quite a few leaves a few weeks ago, or is something else the ...
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0answers
34 views

What disease does my hemlocks have

I am not entirely sure they are hemlock trees. They were not doing so hot when I moved in 2015, but it's getting worse over the past few years. They are located near Albany, New York State, US. ...
0
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1answer
59 views

Foliage Plant identification and help with yellow spotting on leaves

Can you please help me with two (related) things? Firstly, can anyone tell me what the non-ivy plant in the picture is? I got it at a local supermarket for Christmas a couple of years back, and it ...
4
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1answer
284 views

Why do I have brown “jelly” and rotten smell inside my healthy looking tomatoes?

I have about 30 tomato plants of several varieties, all hybrid except for one heirloom. Every single tomato plant is having the same issue but my peppers, eggplant, green beans, and cucumbers are fine ...
3
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1answer
136 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. ...
2
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1answer
545 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 ...
3
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1answer
61 views

Disease on walnut - light green convex lumps on leaves

There are convex light green lumps on the leaves of my family's black Walnut - only in one region of the tree. The reverse side of affected areas has like a fuzzy yellow crust. What is this and is it ...
5
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2answers
135 views

Is a virus, or something else, causing my tomato leaves to become shriveled, yellow and wrinkled?

Information: two tomato plants - one is some kind of a plum tomato, and the other is a black tomato. the plum tomato's seed was taken from a freshly cut plum tomato (which was bought at the ...
2
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3answers
4k 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 ...
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0answers
58 views

What pest is affecting my tomato plants?

This is the fourth year I've been growing tomatoes in my garden, but this is the first time I see this pest affecting my plants. The plants have black, brown spots on yellowing leaves. On some of the ...
2
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0answers
33 views

Is this green scale?

I have a small orange tree, and for the last few days the leaves are getting sticky and some green bumps and small white dots appeared in the trunk and leaves. From my google search it looks like ...
3
votes
1answer
526 views

What’s wrong with my Aloe Vera plant?

I have absolutely no idea what’s wrong with my aloe. It started getting these patches of light brown spots a few weeks ago and appears to have spread. Any advice on what it is/how to treat it?
5
votes
1answer
100 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. ...
5
votes
1answer
122 views

How to treat a magnolia with white fuzz on its leaves?

I can’t find photos with similar problem in the internet. Therefore, I don’t know how to treat this. Please help me, the tree looks worse each day.
3
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1answer
51 views

Fig tree leaf color lighter than usual

Why does the fig tree (about 10x10x10feet in size) leaves have light green spots like this?
5
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1answer
518 views

Need identification on this growth on cherry & possibly plum trees and possible remedies

It's what I like to call The Alien Fungus, the plants don't seem to be happy about it, but they do give fruit - it grows in continental Croatia, Europe, typical yearly temperature range -20 to 40 ...
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1answer
41 views

Spots on Magnolia

My Kay Parris Magnolia has some odd white spots on it. I’m wondering what these could be and how to deal with them?
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0answers
26 views

treating potato plant disease with ridomil

Potatoes in our garden got attacked by a disease. Take a look: Presumably, this is late blight. The recommended practice is to spray potatoes with ridomil fungicide. I am very skeptical about using ...
3
votes
1answer
120 views

Problems with Camellia sinensis

All my Camellia sinensis appear with the leaves like the foto shows. All the other Camellias ( japonica and sasanqua are Ok)- Please, someone knows what it is?
2
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0answers
69 views

why do the leaves of my papaya tree twist and dry

I have papaya and mango saplings. But there are such problems on their leaves. Could you please help me ??I wanted to send a photo but I could not upload it.
3
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0answers
148 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 ...
4
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0answers
51 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 ...
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2answers
83 views

What are the diseases that affect Angelica?

I've never grown angelica, or seen anyone else growing it. What diseases should I look for when growing it? How do I cure the disease to make the plant healthy again?
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0answers
111 views

White spots on Ocimum tenuiflorum leaves (chlorosis?)

I'm growing Ocimum tenuiflorum (O. sanctum) from seed. Since 1 week ago, some seedlings have white spots on the leaves. I didn't see any insect or so and the spots look like a “depigmentation” of the ...
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0answers
40 views

Thin Pachysandra = Volutella Blight? How can I fix these areas?

I live in zone 6a (Ohio) and just purchased my first house April 2017. We have had problems with the Pachysandra in the landscaping around the home. It seems to be thinned out and weak in some of ...
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0answers
40 views

Help to ID tree and determine if it may be diseased

would like to identify this tree and determine whether it is diseased or not. Thanks for any feedback.
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0answers
17 views

can you use blight spray on all edible and ornamental trees, shrubs and bushes

At first, it was just my pear trees, then it seems everything has it. It looks like brown spots that turn the leaves yellow. But there are holes and half eaten leaves also. Some leaves such as my ...
3
votes
1answer
80 views

How to save a tree that is falling apart?

I have an issue with my trees. They have been gradually shedding bark and now it's to the point where a couple limbs have fallen off this spring. I've attached the pictures and hope someone will have ...
2
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3answers
82 views

My heuchera has acne!

Can anyone tell me what is going on here? I am not familiary with this plant disease but it sort of looks like the plan has acne. The plant is a "Berry Smoothie" variety of heuchera, so the leaves ...
4
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1answer
42 views

Spots on climbing rose canes

Last season my climbing rose had a very strong fungal infection, black-spot or something similar. It affected most of the leafs. This spring I have noticed black rings on most of the canes (see ...
4
votes
1answer
1k views

Flamingo flower (Anthurium) leaf discoloration

In February I received this flamingo flower, and the underside of some leaves has v-shaped brown patches. Initially, I kept it under a high-intensity energy-saving light bulb, and was wondering if ...
3
votes
1answer
9k views

Kentia palm leaves turn brown

I have bought a 7 foot Kenia Palm about 6 weeks ago and keep it indoors in spot with indirect light. The palm gets 1/2 gallon of water once a week and I added half a tablespoon of 20-20-20 all ...
5
votes
1answer
2k views

Dracaena Massangeana: Leaf spots on new growth

Over the course of the past week I noticed spots developing on some of the new leaves. These start as faint yellow halos and seem to develop a brown core quickly over the course of a few days. The ...
6
votes
1answer
1k views

Problems with fairy castles cactus

My beloved fairy castles cactus has been suffering for a while and I was wondering what could be happening now. It looks like having several different problems... specially worried as it looks ...
5
votes
1answer
343 views

Why is the trunk on my plum tree soft?

This hole was a soft spot. Peeled off the outer bark and the stuff under it was rotten. Feeling up the trunk from this spot, the trunk is soft about a foot further. The tree is a yellow plum and is ...
4
votes
2answers
579 views

What is/are the probable cause/s of Avocado leaf curl?

It is known that Avocado (Persea americana) is vulnerable to viral, fungal, and bacterial infections, as well as disease due to nutrient deficiencies. The specimen pictured below is growing within ...
20
votes
2answers
5k views

What is this green-ish thing inside the orange?

So, inside this orange there is this "alien" thing. Before I want to say that this is GMO, I need an reasonable explanation about this. What is this thing?
2
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0answers
113 views

Need help identifying rust-looking spots on Paphiopedilum

I've had this Paph for about 4 months, and recently it's gotten some spots that I'm not sure whether I should be worried, or if it's natural, or how to take care of it. It's only happening on the ...
3
votes
0answers
46 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 ...
3
votes
1answer
103 views

Why has my evergreen gone brown in spring?

I have a row of tall evergreen trees, I guess 25-30 feet tall. Don't know what they are but we've thought perhaps some sort of tree laurel due to the waxy, oval leaves - though much more delicate than ...
6
votes
3answers
60 views

Can I propagate a healthy plant from one that has a White root rot disease?

I have three Dracaena fragrans house plants that were propagated form another large plant. I've found that two of them have White root rot disease. (The plant that did not have the fungus was the ...
0
votes
1answer
444 views

Bay Leaf Tree - Scale [duplicate]

My tree is contaminated with scale and I am in the midst of cutting all the leaves/branches. The tree trunk appear to be infected minimally. Can I use Insect pest killer with 20 g/l petroleum oil, 0....
3
votes
0answers
880 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 ...
3
votes
1answer
2k views

Does anyone know what’s wrong with my Areca Palm?

I’m quite new to this, honestly should have done this earlier. I got plants to keep me company in this lonely place as I’m in uni, I’ve had my plants since September and to be honest it’s been a long ...
3
votes
1answer
94 views

What is wrong with this Strawflower?

I have a tom thumb/dwarf strawflower growing in a gallon plastic pot. It's not supposed to get higher than 15 inches and the plant next to it came from the same packet. It only has a few flowers on it,...
3
votes
1answer
832 views

Cactus with brown and white spots. What is the problem?

My cactus has had this brown spot on its side for a couple weeks now and I don’t know how to fix it. I think it happened when I was away for a month and forgot to have someone care for it. The house ...