Questions tagged [diseases]

For questions related to plant diseases.

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Brown flecks on Monstera Deliciosa

I just received a Monstera Deliciosa in the post today and noticed what look like brown flecks all over the leaves. Anybody know what they are? If it's rust, any advice on how I can treat it? It ...
2
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1answer
69 views

Having Various Issues With Multiple Tomato Plants

I'm a beginner backyard gardener and I have been growing vegetables in hydroponic containers for a few years. This is the first time I tried to grow vegetables on the soil (22 pots total) and I'm ...
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3answers
88 views

Why does this chili pod have spikes?

I got some hot pepper seeds off the internet earlier this year and managed to get a couple of plants to fruit. The two plant that I've kept were supposed to be scotch bonnets and lemon drop peppers. ...
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0answers
78 views

What is wrong with my Hydrangeas

My hydrangeas were looking beautiful until a few weeks ago. Then I started noticing that some of their leaves had these gray powdery looing spots on them, their blooms started having brown spots and ...
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1answer
30 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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27 views

Indoor plumeria disease … help!

It's in a pot, was doing well until recently. it started with the white spots (embedded in the leaf, cannot be scratched of or not seen on the other side). Then the brown spots show up, leaf turns ...
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0answers
26 views

This asian squash leaves got black edges

This is a type of Asian squash (very common in Vietnam): I am trying to grow in Pacific Northwest in the summer but I got unlucky People have done this before so this plant definitely can survive ...
2
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1answer
32 views

Gardening. Potted cucumber plants

My potted cucumber plants appear to have mosaic virus. How is an insect barrier created?
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7 views

Leaves turning brown?

This is one of two indoor planta I bought a Walmart. It used to be nice, but then I noticed that the leaves are turning brown. It’s not overwatering because I bought two of them and the other doesn’t ...
2
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2answers
53 views

What to do about a flowering currant covered with white disease or fungus?

Does anyone know what this is and how to deal with it please (I am in the UK)? Are there any precautions I need to take if I just remove the whole shrub? It is a flowering currant. Thanks
2
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1answer
234 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.
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24 views

HELP for diagnosis: Young pepper leaves are curling inward with no pests evident

I’ve been growing this plant hydroponically for about 1 month now and the new growth and some older leaves are curling inward. I suspected that it might be due to insects but there seems to be no ...
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3answers
78 views

Colocasia esculenta leaves drying

I have a few colocasia tubers planted since 2 months in a cocopeat perlite vermiculite compost 2:1:1:2 potting mix. Its leaves dry up when they reach a medium size after having a crispy bit of edge ...
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23 views

Fungus on mango leaves

Help! My seed-potted mango plant is struggling with white fungus-like dots on the youngest leaves. Plant is about 7-8 mo, on balcony (open air), fertilizer never used. Last few weeks were very hot. ...
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1answer
38 views

What’s wrong with my Marigolds?

Not sure what’s wrong with my plants. They get water, fertilizer and have been sprayed with Safer’s 3-in-1 as well. Any ideas?
4
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1answer
127 views

Why are my tomato plants wilting?

Leaves are yellowing then wilting up. BELOW: If you zoom in on the leaf you can see white organisms along the midrib and veins. Indoor grown under LED lighting with air conditioning. These ...
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0answers
21 views

Problems with new cherry trees (UK)

About three weeks ago I had a pair of sweet cherry trees planted -- they are 3-4 years old, about a meter high, and were planted where I'd previously had a seriously overgrown cotoneaster and a ...
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299 views

Leaf curling in curry leaf plant and white patches on stems?

I've looked at the reason for leaf curl and another question on curry leaves, but this is slightly different. Since it's been raining quite a bit and the plant is in this type of a grow bag, I'm ...
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0answers
48 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 ...
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0answers
22 views

Disease on Thuja Occidentalis

In our garden there are two northern white-cedars (thuja occidentalis) that have gotten a strange light-greenish area on the base of their stem (see the image enclosed). The infected species are in ...
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1answer
66 views

What is this white web-like, mold-like thing on the plant

what is this web-like, mold-like thing on the base of the watch chain succulent plant? I searched in google for plant "molds" --> I saw powdery mildew. I think this is not that. It's more similar to ...
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25 views

My nectarines looks sick - what to do?

Our young nectarine tree just started to give fruits (after we managed to save it from the hyraxes), but the fruits look sick - they are browny and sticky. Also, many leaves have small holes in them: ...
3
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1answer
87 views

What causes purple spots in basil?

I have grown a lot of green basil in my life. I've had less luck with purple basil until last summer, when I was able to grow several basil species, including green (genovese) and purple (amethyst I ...
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1answer
58 views

What is this plant and the white stuffs?

This plant is in my front yard from previous owner and now I just pay attention. It has white stuffs all over the places. What is it and is it normal?
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30 views

Is this burnt from fertilizer?

I plant this about two months ago and now it is showing yellow leaves I think it is due to some powder-like fertilizer I put around the root (5 inches away) and bury in the compost when I planted it. ...
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3answers
64 views

Tree not getting leaves in one section

I live in Illinois, and have a new construction home (I moved in April 2016). This tree was left and original to the land. Not sure what kind it is. The first year I moved in it was fine through fall. ...
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0answers
69 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 ...
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0answers
31 views

Tomato Plants wilting

Whats wrong with my tomato plant? The up close one is a Celebrity Hybrid Cherry tomato, and the one in the back is a Cherokee Tomato from “Bonnie plants.” I sprayed them with miracle grow All Purpose ...
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1answer
134 views

Is my red oak tree dead? Only suckers growing:(

I need help! I got this tree approximately two years ago May 2017 to be exact and it was fluffy lots of leaves!! However, this year it did not grow any new leaves only suckers, can anyone please give ...
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1answer
47 views

Recent tomato plant foliage growth suddenly covered with black dots

I went to water my tomato plants this morning and noticed that much of the most recent leaf growth was covered in black dots. As can be seen in the following photos. Note that the drops of water on ...
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0answers
37 views

Do these watermelon plants show signs of mosaic virus?

I salvaged and planted three watermelon seedlings a few weeks ago after my, somewhat flimsy, greenhouse blew over in a wind storm. The seedlings seemed to be thriving in their new homes, but this past ...
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1answer
62 views

Weird black egg-like things on cherry fruit tree leaves

My bing cherry fruit tree just developed this about a week or so. It is mostly near the top of the branches on small leaves: Here is another shot (shiny thing was Neem Oil I tried to put on but ...
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1answer
26 views

Dangers of powdery mildew

My neighbor has a medium sized tree right against our common fence that had a bad case of powdery mildew, so he decided to cut it down today. We have plants on the other side of the fence, and a lot ...
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0answers
28 views

Black spots on basil leaves

I just got these basil plants a week ago and now they seem to have these black spots on them. All three of the plants are in the same general area, and all of them have the same symptoms. I recently ...
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0answers
16 views

Pesticide for plants?

For some reason, most of the plants at my house have some sort of bug, from mealy bugs to whiteflies to other crap. I've been spraying with soapy water but it's not working. What pesticide can I buy ...
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1answer
44 views

What is wrong with my acer (and can I save it?)

I got given an acer about this time last year, and put it in a pot because I didn't have anywhere ready to plant it. It did fine last summer, and looked good in the spring with new leaves coming out, ...
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0answers
26 views

Fruit cherry leaves got eaten by something?

I have bing fruit cherry tree and the leaves look like these It is randomly at different spots. Is this something I should be concerning? Is it caused by disease or some bugs eating them? UPDATE 1 ...
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0answers
41 views

Is this a chili disease or just bad treatment?

Some days ago I found out that my chillies had some kind of small worms-looking things. Probably thrips or something else. And I had some kind of flies. I sprayed them with soapwater. Some of the ...
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0answers
34 views

Brown thing around Mango leave's veins

My 4 mango plants (from 5 to 8 months) are now struggling with weird disease. It started about 3 weeks ago, lower leaves got brown and finally gone. Now I have noticed brown thing on younger leaves. ...
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1answer
55 views

Should I take precautious measures?

Noticed these fuzzy little balls clumped together in my pot. Its not a root. The other holes have very very very small white dots in the soil almost like little tiny specs of mold or eggs. Should it ...
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2answers
122 views

Is this a bronze birch borer infestation?

I have three birch trees in my front yard that I've been told have a bronze birch borer infestation, based primarily on the presence of numerous holes, each about 6-7 mm wide. There does seem to be ...
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0answers
22 views

Apple tree concerns

I purchased a house with an apple tree, maybe 15' tall and 6" in diameter. The tree has two longer branches and I was wondering how to go about trimming them. If anyone can tell me where to make the ...
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1answer
54 views

What cactus' disease is this?

My sister has this cactus with those brown spots in it. It does not seem to be spreading, or if it is, is very slowly. Does anyone know what it is so we can treat it?
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77 views

Why is my marigold drooping

Just a couple of hours ago my marigold was fine, the next time I saw it.... It had its leaves dropping, soil dry but the flowers were fine. The two leaves at the beginning of the stem are starting to ...
2
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1answer
71 views

Sansevieria disease

Anyone know what is happening to this sansevieria?
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3answers
94 views

What disease is this (tomato plants)?

I got these seedlings that i re-potted. The bigger leaves get white/yellow spots and the baby leaves go dark as they sprout and wilt very fast. I have a few varieties in small containers that seem to ...
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1answer
111 views

White stuff in citronella plant?

What is this white stuff in citronella plant and how can I remove it? It looks like a type of insect. Both of my citronella plants have that. Is it contagious? I started spraying it today with soap ...
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1answer
60 views

What are these things on my apple tree?

I have recently bought an orchard. And one of my trees has these things on its bark. Is these some kind of infection? is it important and what should I do about it?
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1answer
25 views

Crippled nectarine tree leaves

Not sure what's causing this crippling on the leaves of nectarine leaves. Please help. Zone:9 (northern California)
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1answer
235 views

Is something wrong with my ZZ plant?

This morning I looked over my ZZ plant and saw these white spots underneath some of the leaves. The best match I could find is something called powdery mildew. Is it that or is it something else?