Questions tagged [diseases]

For questions related to plant diseases.

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2answers
115 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 ...
16
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2answers
4k views

Why did my sweet corn kernels grow into this?

This corn is about 2 weeks premature to be picked. It had lots of green bugs and japanese beetles chowing on it, but I didn't do anything weird to it (no Ninja-Turtle ooze for instance). I can't ...
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1answer
47 views

what are these brown spots on my potato plant?

I have noticed brown spots on my potato plant but cannot figure out what it could be. Do you might have an idea?
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1answer
38 views

Why are my courgette leaves shrivelled and yellow?

I have a courgette (zucchini) plant growing in a container, and the older leaves have turned yellow, brittle and shrivelled at the edges, with a little mould also. What could be causing this? Is it ...
9
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4answers
18k views

Beet plant - leaves turning yellow-brown

I have a beet plant that I grew from seeds. They started off great and healthy. In fact I plucked some leaves to use in a salad. After that some of the leaves are turning yellow and drying up. What ...
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2answers
83 views

Not sure what is happening to tomato plant

Not sure what is happening to my tomato plant. Plants have been in a really sunny spot. We had been in a drought, but we’re consistently watered. Then the last few days it started raining pretty heavy ...
2
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0answers
19 views

Unknown discoloration on tomato plant: how serious is this?

One of the tomato plants in our garden has discoloration both on the upper leaves and on one or two of the fruit, as here: How serious is this, and how should I address it? Is the plant salvageable? ...
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1answer
47 views

Why is my mint dying?

My mint is developing brown spots on older leaves and is wilting. What disease is this? Can I save it? https://imgur.com/a/G3oceQM
1
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1answer
94 views

Brownish yellow spots on monstera

Spots have developed on the leaves of my monstera deliciosa, and I've found nothing online that's quite like it. It's not on top of the leaf, can't be wiped off, and it's not growing in regular ...
3
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2answers
95 views

Clematis leaves turning purple

The picture below is of clematis Bourbon. Some of its older leaves are turning purple and I don't understand the reason. It has been like this for couple of months, we have new growth which makes me ...
3
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1answer
39 views

Clematis leaves having white lines

On the below picture you can see some of the leaves of my clematis Hagley Hybrid having light grey lines of unusual pattern. I am afraid that if don't do anything, this might spread to other leaves. ...
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1answer
42 views

Grey spots on Clematis leaves

One of my clematis Tekla stopped growing a month ago and sort of froze in time. Its leaves started having grey spots and new growth leaves dried out as you can see from the picture below. Initially I ...
4
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1answer
49 views

What are those brown / white spots on my cactus?

There are 3 of this same cactus sharing the pot. Only one of them is getting these spots. What could it be? Fungus? Sun burn? They are in my balcony, they don't get rain, and they get like 3-4 hours ...
2
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1answer
47 views

Gardening. Potted cucumber plants

My potted cucumber plants appear to have mosaic virus. How is an insect barrier created?
4
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1answer
96 views

Apple tree - Is this a disease?

Started noticing this from last summer(December, NZ) and now getting bigger. Had a good harvest last season, but, getting worried :( any information on what it is and whether to treat it or not will ...
2
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3answers
41 views

What is damaging my tree Aloe?

I've had a Aloe plant for many years, mostly indoors. I finally repotted it a couple of months ago and split most of the pups off. All of the plants seem to have some sort of disease since then, ...
3
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1answer
24k views

Why is my philodendron getting these brown dry parts on its leaves?

Why is my philodendron getting these brown dry parts on its leaves? You can see in the attached photo where it is starting to get brown (bottom left). In the second photo you can see that almost the ...
3
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2answers
58 views

Lilac Tree Branches Suddenly Dying

I have a Japanese Lilac Tree that was fine 2 weeks ago now there is 2 dead branches and 1 that is starting to die. They are not isolated and are random, with the first near the base of the canopy one ...
1
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1answer
34 views

Mottled yellow leaves on Zucchini [pictures] - Disease ID?

I have some black beauty zucchini growing. I've noticed some leaves with a mottled orange/yellow color. It's not the whole plant but just some leaves. Other zucchinis in my garden of a different ...
3
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2answers
42 views

Zucchini, eggplant, melon and cucumber pest/disease?

I'm trying my hand at growing some vegetables on my balcony. I'm in Firenze, Italy, it's currently 30-35 degrees Celsius (about 95 Fahrenheit?) and I have full (10+ hours) sun on my balcony. The ...
7
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1answer
5k views

Grapes leaves too dry - is that normal?

Recently I noticed my green grapes leaves don't look too good. There's nothing like scales or ants or any other sign of parasites. Only older leaves are affected, new ones are fine as you can see on ...
1
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1answer
174 views

Pale green areas in new leaves of Draceana fragrans, disease?

Does anyone know whats wrong with my draceana? All the new leaves have those "pale green" areas, they have it already in the beginning. I´m familiar with the common pests and they are not the cause. ...
0
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1answer
24 views

(NW Indiana) Yellow pumpkin stems and leaves

Northwest Indiana. Pumpkins were planted at the end of May. I noticed within the last 2-3 weeks the stems on both plants started turning yellow and the skin started breaking open (for lack of a better ...
4
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0answers
40 views

Cucumber disease/ pest identification

Can anyone tell me what is happening with this cucumber plant?
2
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0answers
45 views

What's this white stuff on my petunias?

Any idea what is happening here and how do I fix it???
2
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0answers
454 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 ...
3
votes
2answers
44 views

Is it normal for an oak tree to slough off its thick bark without it growing back?

I have several oak trees in my forested back yard that are in various stages of loosing a thick outer layer of bark, revealing thinner whitish bark underneath. Once this bark is lost, it doesn't ...
1
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1answer
65 views

Pepper plants are showing strange, deformed new growth, what could it be? Virus? Deficiency? Herbicide?

New-ish gardener here! This year I have planted 5 varieties of peppers in a brand new raised bed in central Arkansas (zone 7b). Fill for the raised bed is 100% compost purchased from a local plant ...
0
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0answers
18 views

Damaged leaves - Bugs or what?

I've had an issue ever since I moved into my new apartment. I have plants in different rooms, all by the window in south/south-west orientation. There are different plants (basil, carrots, parsley, ...
1
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0answers
29 views

Yellow then brown spots on Kale leaves

I've been growing Kale under a 600W LED grow light for the past few weeks. My plants were doing quite well and I'd begun hardening off the oldest two to prepare them for transplantation. After 8 days ...
0
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1answer
15 views

Staghorn fern back turning black

I have not been overwatering my staghorn fern, I water them at the base about 60cc every week. I don't most my plants very often and they have been stable for a year until this happened. The only ...
4
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1answer
83 views

What are these white things on new leaves?

I have roselle planted. But I see these on the leaves. What are these? Edit: Added closeups
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0answers
20 views

Acer Palmatum: New buds dying

After an extensive research through the web I did not seem to find a clear answer to what my acer is experiencing or how to act on it. I am not an expert and this is my fist acer, so I find myself a ...
0
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1answer
29 views

Rose tip got brown burn quilted and dropped rose head

I bought this rose from David Austin last year https://www.davidaustinroses.com/us/the-poet-s-wife-shrub-rose Every since it was fine until I check it today in May 25 (I am in Pacific Northwest) It ...
8
votes
2answers
1k views

Brown spots around the veins on a hot pepper plant's leaves

I noticed this on some on my Carolina Reaper plants. A lot of the leaves have this kind of spots surrounding the midrib and the veins. The plants grow indoors in 5l pots but I kept them in the garden ...
2
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0answers
37 views

Can I save my lucky bamboo by replanting its leaves?

My lucky bamboo is turning yellow from the middle outwards, most likely because of microbes which entered through a wound. I have already cut off a small green top of the bamboo, disinfected the wound ...
2
votes
1answer
32 views

What is the diagnosis and treatment of a 5 year old Blueberry plant?

Our five-year-old blueberry plant, that has always produced well is full of berries and all of a sudden has dying branches and leaves turning red. I’ve included picture. We did fail to prune it last ...
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2answers
45 views

Lilac tree disease

I have a pair of lilacs, very close together, which have been fine for ten years. This year they have hardly any leaves (just patches of them) and what appears to be a whiteish and partly yellowish ...
1
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1answer
34 views

Use of hydrated lime as a calcium source

We have blossom end rot problem which is apparently a calcium deficiency. We have some builder's lime which I am told is calcium hydroxide and would like to use that as the calcium source. We can't ...
1
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2answers
54 views

Kumquat fruit drop: Always the same result, no matter what

I got different responses, often conflicting ones: It could have been from excess water as well as lack of water. While June drop may be associated with heat, even fruits which formed later in the ...
1
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1answer
52 views

Dark spots on plant with heart-shaped leaves

I have an indoor plant with thick, dark green heart-shaped leaves that has developed some small black and brown spots. Does anyone know what this is? I asked a question earlier this week about a ...
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0answers
18 views

Black and Yellow dots on Scallions

I'm new to gardening and well recently I decided to try to grow scallions from leftover Scallion ends. first I placed them in water to grow them out a bit then I planted them in a random pot that had ...
0
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1answer
28 views

Why do my roses look dry, brown and full of holes?

I've been using Bayer's BioAdvance Rose and Flower care to feed and prevent insects/diseases. It did ok last season, not wonderful, but ok. This season my rose bushes are dry, they have brown/rust ...
0
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3answers
62 views

Dealing with fungus and molds

I'm interested in ways to deal (remove) fungus from spaces used to germinate seeds. I noticed that hydrogen peroxide, isopropylacohol and baking soda. Are these just for fungus or mold too?
3
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1answer
1k views

yellow and dying leaves of grape vine

Just wondering the possible reason why the grape vine leaves are dying. The fresh leaves looks fine, though a bit yellowish. Here is some pictures. Any suggestions to cure the vine? Thanks.
3
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1answer
58 views

Avocado leaves have various type of browning and dying young leaves

I have two avocado trees each about a year old, planted first time around spring of 2019 in a pot in UK. They really grew well until this winter when the leaf tips started browning. I use filtered ...
7
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1answer
25k views

My Areca Palm is dying

I bought a 5ft areca palm about a month ago. About two weeks after I purchased it, I noticed some leaves had spots and others were turning brown. Initially I thought it was normal but more leaves seem ...
1
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1answer
35 views

What kind of tree is this, and is the white “powder” on some leaves mean it's diseased?

I live in southern California and moved into a new house a few months ago which had this tree planted in front of the house. When we moved in, it was basically bare, but over the past couple months ...
4
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1answer
781 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 ...
1
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0answers
12 views

Can I safely spray copper fungicide for peach leaf curl during summer?

My family has a peach tree with severe leaf curl which they did not notice; I picked up some copper octanoate (0.08%) fungicide today as soon as I noticed. With about half the leaves damaged, I'm ...

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