Gardening and Landscaping Stack Exchange
Gardening and Landscaping Stack Exchange

Questions tagged [diseases]

For questions related to plant diseases.

Plants can be infected by a number of diseases. These can be caused by micro-organisms (e.g. bacteria, fungi, viruses; and multi-cellular creatures such as nematodes).

Macroscopic creatures (e.g. mites and aphids) and water/nutrient problems (too little or too much) can also cause symptoms that can be confused with diseases.

Use this tag for all questions related to diseases - especially diagnosis, management, and cures. Please include pictures of the affected parts of the plants.

816 questions
8
votes
2 answers

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 to be showing these symptoms. The palm is…
user3016278
  • 81
  • 1
  • 1
  • 3
8
votes
1 answer

What is eating the leaves of my rubber plant?

They were fine few days ago, now these almost transparent patches exist on the leaves. I inspected the leaves, and there is no bug I can see. But they look like they got chewed by some small insect. What is this and how should I avoid…
4-K
  • 3,117
  • 10
  • 42
  • 61
8
votes
2 answers

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 for a period of about half a year when the…
toniedzwiedz
  • 440
  • 3
  • 12
8
votes
1 answer

Zucchini leaves yellowing - but not powdery mildew

I have about 8 zucchini plants, about 6- 8 weeks along, which are starting to show signs of disease on the leaves. It's definitely not powdery mildew, but the end result is quite similar. Leaves are getting yellowish patches which then develops…
going
  • 6,342
  • 6
  • 35
  • 64
8
votes
1 answer

Pinus sylvestris yellowing problem

I'm pretty new to gardening and I recently (~2 weeks ago) got a Pinus sylvestris 'Fastigiata' plant and I noticed that some needles started to yellow. Here are a few pics:- The yellowing is mostly on the internal and lower needles, but there is…
Milan
  • 81
  • 4
8
votes
3 answers

Can you eat lettuce that your dog pees on

I planted some leafy greens on a space of dirt where my dog likes to pee and poo. She has almost certainly pee/pooed on the lettuce, or near the lettuce, a couple of times. The plant was perpetual spinach. Can I eat it, given that I wash it? Can I…
Joao Noch
  • 323
  • 1
  • 2
  • 6
8
votes
1 answer

What's this black spot on my gasteraloe?

I have another question about this plant. I noticed a large black area at the base, surrounded by little black spots. When touching this area it seems normal, it's just turned black. So my guess is that it's not rot but a disease/fungus. It seems…
Augustin
  • 687
  • 1
  • 6
  • 12
8
votes
1 answer

How do I get rid of box rust in December? Will fungicide work?

I have two buxus which have suffered a lack of water due to irrigation failing in the summer and no time to hand water them. There is a definite orange tinge to the first 2 or 3 inches of top growth. I fear pruning at this time of year will kill…
Stu gardener
  • 81
  • 1
8
votes
5 answers

What is wrong with my beefsteak tomato?

My beefsteak tomato is setting lots of fruit, but the larger leaves are curling, and have fine black spots. The pot is 24x24 inches, and the soil is miracle gro. It's new in this pot this year. The temperatures have been 75-80F degrees and…
Bre
  • 81
  • 1
  • 5
8
votes
1 answer

Can I use waste water from kitchen for plants?

Can I use the waste water mixed with dish washing liquid from kitchen for watering my garden?
Poornima Kumar
  • 129
  • 2
8
votes
2 answers

How to treat diseases and bugs on peach tree?

I have a young peach tree (18 months old, never gave fruits) in my yard in Florida that recently lost all its leaves. The leaves are eaten but also covered with brown spots. I'm wondering if the issue is caused by bugs, or a disease, or both, and…
Julien Vehent
  • 183
  • 5
8
votes
1 answer

Is this fig tree disease or just malnourished?

My folks in Berkeley, CA (San Francisco Bay Area) showed me their young fig tree the other day to see if I could figure out what was wrong with it, but I wasn't certain. I searched here (during title search) and found a nice document from the…
NOTjust -- user4304
  • 215
  • 2
  • 6
8
votes
1 answer

What is the cause of the dead spots in my lilac bush?

Last year, we built a home and got a Lilac as part of our landscaping package. The landscaping was planted in August, so it's almost made it a full year now. In June, we started to see dead spots appearing in the bush, where the leaves shrivel up…
Mike Cornell
  • 183
  • 1
  • 7
8
votes
3 answers

What happened? - Chilli plants are developing spots on leaves and the edges are curling

I found some questions about other chilli plants, but I don't think the leaves look quite the same as mine, though it may be the same as the 2nd question posted. What is happening to my chilli plant? How can I help it? Dry brown patches on cayenne…
Megasaur
  • 1,165
  • 5
  • 16
  • 23
7
votes
3 answers

What are these white streaks on my tomato plant?

I've also seen similar streaks on my basil's leaves but not as pronounced.
Soo
  • 491
  • 4
  • 8
1 2 3
…
54 55