Questions tagged [diseases]

For questions related to plant diseases.

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5
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0answers
41 views

Cucumber disease/ pest identification

Can anyone tell me what is happening with this cucumber plant?
2
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0answers
48 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
475 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
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2answers
45 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 ...
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1answer
83 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 ...
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0answers
19 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, ...
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0answers
33 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 ...
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
25 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 ...
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1answer
31 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 ...
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0answers
38 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
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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
92 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 ...
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1answer
35 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 ...
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2answers
63 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
74 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
20 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 ...
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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
votes
1answer
62 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
27k 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 ...
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1answer
36 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
995 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 ...
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0answers
13 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 ...
3
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2answers
69 views

Why does my orchid have spots on its leaves?

I have an orchid that has spots on two leaves, and no spot on the other leaves. Among these two leaves with spots, one (named "Leaf A") has more visible/pronounced/impressive spots than the other leaf ...
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0answers
35 views

Help! Tiny black eggs on thyme stem

I wonder if gardening gurus here can help? The thyme plant I bought from the garden centre has tiny little black dots all along the stems, though the leaves all look untouched and the plant seems ...
4
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2answers
1k views

Can dragon fruit get scale?

I think that my dragon fruit has scale. This is my first encounter with scale so I want to check first. I assume that any plant can get scale. When researching it I never saw it mentioned on cacti so ...
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0answers
12 views

What are these whitish patches on my fig (I think) tree?

https://imgur.com/a/HczqGq9 This is a link to a higher definition image. Lower resolution below. Is it a sunburn? Or a fungus? I’m very new to this, and I’m hoping someone could please help me out.
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0answers
37 views

Pomegranate bonsai looks ill (reddish brown leaves and leaf curl)

I live in coastal Virginia zone 7b and have had a small pomegranate bonsai for 6 years now. Unfortunately last spring it started to show signs of stress or nutritional deficiency. The leaves started ...
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1answer
49 views

Help me diagnose my tomato plant's stem problem!

I'm a beginner gardener, and growing tomato plants for the first time. I need help diagnosing a problem on my stems! I regrew my three plants from seeds of a small heirloom tomato that I came across ...
2
votes
1answer
39 views

3 Mango Trees (6 months old); Grayish-Orange Spots heavily progressed; Blackening/brown curling leaf tips; 1 Mango Plant losing all its leaves!

Mango #1 Picture Gallery Mango #2 Picture Gallery Mango #3 Picture Gallery I have had previous problems with Mango #1 and posted here a while ago, link here I have 3 mango trees I am growing ...
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0answers
11 views

Wrinkles on Mangoo tree leaves

In my lawn I have 3-4 different types of mangoo plants (1-3 years old). Few weeks back I diagnosed that leaves are curling and turning brown, I googled it and found that its some fungus and I need to ...
0
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0answers
28 views

What are the brown spots on my tomato leaves?

These spots have been developing since the weather turned from hot and sunny to overcast with showers. The closest images I've found online are of magnesium deficiency, but I'm not convinced enough ...
2
votes
1answer
42 views

Yellow/brown spots on monstera

For a couple of months, small black spots have been slowly spreading on two of the leaves of my monstera. On one leaf, they got worse, and ringed with yellow, then suddenly the leaf died. The black ...
0
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1answer
42 views

White and black spots on indoor plants: cayenne pepper and salad seedling

many of the plants I'm growing indoor are having these white and black tiny spots on leaves. Some of my seedlings are affected by it as well. The underside has mostly small black spots. From the ...
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0answers
10 views

Banana Tree Sucker Has a Brown Blotch on New Growth

I recently separated this banana tree sucker into its own pot and it's been growing tall very fast. However, some of the growth is brown as shown. Does this indicate anything such as a lack of ...
3
votes
1answer
192 views

translucent spots in basil leaves

Every year around this time I take my basil outside. After a couple of days maybe a week, transparent spots begin appearing in otherwise perfectly good leaves. Last year I had to throw it all away and ...
3
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2answers
2k views

Disease on peach fruit

Are the pink spots on this peach flesh some sort of disease? I got these from family who bought them at a farm stand in CO. The first one I ate had normal flesh, but the next two have looked like this....
0
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1answer
66 views

Problems with monkey puzzle tree

I’m Anna. I live in England . I have big monkey puzzle tree in my garden and it looks like it’s dying. We moved to the house a year ago . Last year we had very dry summer and since then we noticed ...
0
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1answer
46 views

What are these white fuzzy growths on the soil of my lawn?

This morning, at about 11am, I went outside and found white fuzzy patches growing on the exposed soil of my lawn in a shady spot (in north-west England). It does not appear to be on the grass itself. ...
0
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0answers
10 views

Help identifying cause of withering discoloration on raspberries

I am seeing the following discoloration and withering on a very small number of leaves of my raspberry primocanes I only see this on the tips of the canes, and only on the primocanes. Is this ...
2
votes
1answer
24 views

small brown bumps on majesty palm leaves

I am home visiting my parents and they have had a majesty palm for few years. It's never really thrived as we live in Canada and are not gardening experts. Besides its yellowing, it also has small ...
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0answers
18 views

Strange leaves marks on zinnia and Mint

This morning I have noticed some strange marks on my Zinnia leaves and the leaves of the mint growing nearby: What could that be? And what could be done with it? They both grow on an east-oriented ...
0
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0answers
12 views

Pepino gold has white spots (not edema, not midlew) and I’m clueless

My pepino gold melon developed some tiny white spots on leaves, first it was just the leaves and looked like edema caused by overwatering (which I know can happen for peppers) so I cut back the ...
1
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2answers
74 views

Tomato plant stem and leaves turning dark green/black with yellow circles

I have a few tomato plants where the tops of the leaves and stems are turning dark green/grey. Additionally, yellow circles are appearing on the leaves. These were recently transplanted from indoor ...
0
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0answers
19 views

Mango Tree Young & Old Leaves Curling, Turning Crispy, Drooping, and Browning at the Tips

My tree is grown under a 2000W grow light a little over 3 feet away from the top of the foliage in 70F indoor weather. I figured I had a salt toxicity problem with my old clay pot full of salt all ...
0
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0answers
8 views

Spots on cucumber leaves

Two leaves from teh same cucumber plant, thinking these are two separate issues (lucky me). As seen in the photo, the lesions on the left are pale tan and don't really look like they're bounded too ...
2
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0answers
22 views

What are these yellow spots on my Melocactus concinnus?

I purchased this Melocactus concinnus online a couple of months ago. I don't remember seeing those yellow spots on the bottom half of the cactus. It's possible, however, that I just didn't pay close ...
3
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0answers
18 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? ...

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