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Questions tagged [diseases]

For questions related to plant diseases.

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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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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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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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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
29 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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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: ...
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1answer
45 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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37 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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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
52 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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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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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
47 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
35 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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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
42 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
23 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
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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
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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
34 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
22 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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32 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
23 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
48 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
32 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
21 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
30 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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28 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 ...
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1answer
35 views

Sansevieria disease

Anyone know what is happening to this sansevieria?
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1answer
55 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
21 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
56 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
23 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
56 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?
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0answers
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Cherry tree fungus

I’ve got a cherry tree of some variety (at least, I think that’s what it is). Last winter, some black fungus clusters started forming on some of the branches. I figured I should snip them all off the ...
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44 views

Purple edge on black berry leaves

Hi, I recently bought a blackberry plant (Navaho) and was wondering if any one can help me work out what's going on with it. It has purple edges on all the leaves, one or two have larger purple ...
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1answer
32 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. ...
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0answers
22 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 ...
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1answer
43 views

White spots on cactus

I’m fairly new to gardening but purchased some cactus’ last year. I noticed one started to develop a white spot on the side of it. I isolated this cactus into its own pot. Any idea’s what it is or ...
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0answers
47 views

What are these spots on my new bamboo palm?

Hi all! I’m new to gardening and want to know what’s going on with this palm I just bought from the Home Depot. There are white spots near the roots that look like fungus to me, brown spots higher up ...
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1answer
81 views

Wounded rhipsalis hanging cacti

I need advice caring for my hanging cacti. I think it's rhipsalis lepismium bolivianum? It's started to develop black patches along its limbs. Also some weird spots. And some white muck gathering, ...
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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 ...
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0answers
25 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 ...
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0answers
22 views

Whats wrong with my Basil sapling?

I live in Pune, India. The weather these days is like Temp: 15 to 30 deg C, Humidity: 30 to 60%. The sapling bought from a local nursery a month ago, the plant is kept in the shade. We water regularly,...
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0answers
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Ragweed that has lost its' bloom and now has a cott0n type substance

Why does ragweed develop a cotton type of substance before it had a yellow flowers. It did have worms which I took care of with water.
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0answers
26 views

Why is my Aloe losing leaves?

I’ve had this plant since August and recently it has lost a couple of leaves, I was wondering if anyone could identify a cause. Thanks
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0answers
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What is wrong with pedilanthus?

I live in Uttar Pradesh, India and I have planted pedilanthus in my vertical garden. They are in bright indirect sunlight. Their tips are turning pink and there is also some white fungus. What should ...
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0answers
27 views

Part of the citrus leaves are dull and dark graying

I did look up different diseases online but I'm having a hard time finding a match for these symptoms, the leaves with the dull color feel drier and not as smooth the the touch as regular normal ...
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1answer
28 views

What's wrong with my tamarind?

These four saplings are grown from seed around 6-10 months was growing perfect untill around 4 weeks ago I started to see a little bit of yellowing thinking its nothing untill now.
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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.