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.

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What are these hard white/brown spots growing on my houseplant?

A little more then an year ago I got six palm trees (two vases). It was the Californian equivalent of an Areca palm (the guy in the nursery suggested this one after I asked for an Areca for its air cleaning prowess but now I can't recall the exact…
gcb
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Is it necessary to purchase seed potatoes?

I recently tried growing potatoes using a method I saw on TV. This is just cutting up potatoes into reasonable sized sections and placing them several inches down. The results have been fantastic. While doing some research on how to grow potatoes I…
going
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What is this green-ish thing inside the orange?

So, inside this orange there is this "alien" thing. Before I want to say that this is GMO, I need an reasonable explanation about this. What is this thing?
Zlatan Ibrahimpasic
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What else besides calcium deficiency could be causing tomato blossom end rot?

I've been using "Tomato Maker" (4-2-6) fertilizer, which supposedly has enough calcium to prevent blossom end rot, but I'm still getting blossom end rot on my super marzano tomatoes (no BER problems on any other varieties I'm growing this year).…
eipi10
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Why did my sweet corn kernels grow into this?

This corn is about 2 weeks premature to be picked. It had lots of green bugs and japanese beetles chowing on it, but I didn't do anything weird to it (no Ninja-Turtle ooze for instance). I can't remember the variety, it was a very long type of…
Peter Turner
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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 those very small insects. The white thing can…
Jacek Konieczny
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tomato plant rotting from the inside -- what's going on?

I have a hydroponic garden in a greenhouse in my yard. Everything was going just great until today when I noticed that one of the 7 or so tomato plants (the biggest one in fact) was looking rather wilted. Upon further examination I noticed some…
statichippo
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Sudden Outbreak of Yellow Leaves on Tomato (and Other) Plants

My mother was in a panic this morning. She called me over to help her with her garden because many of her tomato plants had suddenly developed yellow leaves, many of which (but not all) also have brown spots. Here are the facts and…
Synetech
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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 they dried out and turned brown. There are no…
Dmitry Ulupov
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What do I do about the whitish powdery mold on my peonies?

Very early this year (starting in mid-May) my peonies' foliage was covered in whitish-gray powdery mold. What is it and what if anything should I do about it?
Scott Stafford
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Why have my tomato leaves started yellowing at the base?

One of my tomato plants (Better Boys if that matters) has a few leaves that have started yellowing on the lower branches. Not sure if they aren't getting enough water, or if they are diseased or what. What is causing this? If it's a disease how can…
wax eagle
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What are these brown, cap-shaped mushrooms on my birch tree?

I live in Massachusetts and have several birch trees in my yard. One of them has brown, cap-shaped mushrooms growing in groups up and down the trunk. As you can see, the tree has a big crack in the bark. What are these mushrooms, and are they…
Sue Saddest Farewell TGO GL
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What's attacking one Lupin but not its neighbor?

I have two Lupin plants next to each other in my front yard: They are both Russell hybrids, both grown from seed and planted there at the same time in Spring 2009. The one on the left is healthy, but recent growth on the one on the right is…
Niall C.
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What is this brown, shell-like thing growing on the stalk of my avocado plant?

Could you please help identifying this brown shell-like thing growing on the stalk of my avocado plant? There are several of these. It looks like a little shell (with the appearance of a woodlouse's back, but it's not that obviously) and it can be…
neydroydrec
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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 Marconi pepper. Can anyone give me any guidance on…
Mike
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