Questions tagged [diseases]

For questions related to plant diseases.

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3
votes
2answers
2k views

What is causing large white spots on my sweet basil seedling's leaves, and can the plant be saved?

Several weeks ago, I put soil and sweet basil seeds into part of a plastic water bottle that I cut. I put one seed in each of the water bottles, and made a hole at the bottom of the bottles to allow ...
1
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1answer
21 views

thimbleberry leaf browning

I have a young thimbleberry that I planted this past spring. It has been growing well and seemed to be getting established. Now I am seeing some leaf browning. We are in Denver and it has been hot and ...
1
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0answers
53 views

How to control fungal infection on Moringa

7 week old moringa grown from seed started exhibiting white spots and yellowing on leaves. The bottom ones died and dropped off, although new growth continues. Reading that it could be a nutrient ...
2
votes
1answer
570 views

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
60 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?
2
votes
1answer
81 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 ...
4
votes
1answer
279 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 ...
0
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0answers
9 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 ...
0
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0answers
37 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 ...
5
votes
3answers
20k views

What are these small black things appearing on my cucumber leaves, and are they harmful?

There are these little black things on my cucumber plants that have started appearing recently. They are more concentrated towards the 'top' of the plant. They don't seem to be eating away the leaves ...
3
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1answer
237 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?
1
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1answer
4k 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 ...
8
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2answers
5k views

Will peach leaf curl affect my fruit?

My peach trees have peach leaf curl. (Spring came too fast this year, I wasn't prepared, and I didn't get a chance to spray.) They're still young/small trees (10' tall), but they've got a bit of ...
3
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0answers
56 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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2answers
2k views

What could be the cause of rust spots and holes on leaves?

What could be the cause of rust spots and holes on the leaves of my Pluot tree? Other trees nearby do not have this. I'm guessing that those rust spots on the left leaf turn into the holes seen on the ...
12
votes
4answers
61k views

Brown Spots on peppers

I have been growing peppers this summer and they have been doing great. The fruit is really starting to take off, but now I have 3 or 4 of my larger fruit getting these brown spots. This is a Red ...
2
votes
0answers
37 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 ...
1
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1answer
89 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, ...
1
vote
0answers
29 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
votes
1answer
353 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 ...
1
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0answers
31 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. ...
17
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6answers
43k views

What is happening to my chilli plant? How can I help it?

Some white spots appeared recently on my Twilight chilli plant (indoors), on some leaves brown spots start appearing in the middle. First I thought - aphids, but it doesn't quite look like insects. Or ...
3
votes
3answers
70 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. ...
3
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0answers
178 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
74 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 ...
3
votes
1answer
67 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 ...
2
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0answers
88 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 ...
1
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1answer
111 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 ...
1
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1answer
39 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 ...
1
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0answers
39 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 ...
1
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0answers
21 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 ...
2
votes
0answers
42 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 ...
4
votes
1answer
82 views

How can we save the trees in our historical garden from dying?

Our historical building is located in a big garden with 2700 pine trees in Khaf city, Iran, and about 300 trees have died. Is there anything we can do to save these huge trees? Khaf city has warm ...
0
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0answers
46 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 ...
1
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0answers
50 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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0answers
38 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
4
votes
3answers
170 views

Is there a problem with my Japanese Maple shrub?

We live in Vienna, Austria, very near the Danube. We planted this Japanese Maple in the first year after moving in the spring of 2013. It has been slow but steady growing, improving a bit every year. ...
1
vote
0answers
23 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 ...
1
vote
1answer
84 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?
0
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0answers
221 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 ...
1
vote
1answer
60 views

Crippled nectarine tree leaves

Not sure what's causing this crippling on the leaves of nectarine leaves. Please help. Zone:9 (northern California)
5
votes
2answers
4k views

Is the rapid new growth on this rose bush a sign of Rosette?

I recently trimmed back a rose bush (I believe it's a Liebeszauber Hybrid Tea Rose?) that sits in some shade in my front yard, as its branches grow pretty long and eventually start leaning into its ...
2
votes
1answer
937 views

Need help with disease on bronze loquat

I have a bronze loquat in my front yard and noticed some dark brown spots (see pictures) on the leaves. I need help identifying what the plant disease is and what I can do to get rid of it.
1
vote
1answer
76 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?
1
vote
1answer
1k 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?
1
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0answers
22 views

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 ...
3
votes
2answers
170 views

Diseased roses: salvagable, or a danger to my other plants?

This poor potted rose bush (don't know the type) has just been getting worse and worse: Clearly a disease, but what? Can it be saved? I've already pruned 2 branches that had basically died, but it's ...
0
votes
0answers
383 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 ...
6
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3answers
2k views

What are these white streaks on my tomato plant?

I've also seen similar streaks on my basil's leaves but not as pronounced.
15
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2answers
13k views

How to treat a succulent with holes in its leaves?

I have a succulent plant that got some disease and is covered with holes. The holes started to appear a month ago. At first they were green (like something was eating it), probably growing and then ...

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