For questions about plant diseases.

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2
votes
1answer
39 views

What would cause only one cane of a raspberry plant to show nutrient defficiency?

I have a Canby raspberry plant. One cane is showing some form of nutrient deficiency. On other hand, the other stalk is is flourishing and even budding fruit. What would cause this, seeing as the two ...
4
votes
1answer
71 views

What's affecting this tomato plant?

Can anyone tell what's wrong with this tomato plant? Is it disease or deficiency? My areas been having issues with late blight the last few years. One spot seems to have a concentric circle around it ...
3
votes
3answers
447 views

What kind of tree is this and what's wrong with it?

The developer in my neighboorhood was so kind as to plant trees in everyone's yard. But after 3 or 4 years all but one or two (so probably 180 or so) look scrawny and pathetic. I know nothing of ...
3
votes
4answers
152 views

Is this flowering vine diseased?

I'm not sure what the name of this vine is, but about a week ago the flowers started to brown around the edges and then fall off completely. A couple of days ago the leaves began wilting. I did ...
4
votes
3answers
168 views

Are my tomato plants damaged by a chemical or a disease?

Most of my tomato plants have started showing signs of what I think is Cucumber Mosaic Virus. I have shoestring, fernleaf, and curling leaves. They also have a leathery appearance. At first I thought ...
2
votes
1answer
46 views

My bean plants appear to have rust

They're a variety called 'yard long' I think. Could somebody confirm or let me know what else it could be? What's the best way to treat them? It has been a pretty wet spring. We're in zone 3/4. Oops ...
3
votes
4answers
95 views

What's this gash on a Maple tree?

What's this gash on a Maple tree? It seems almost "infected" compared to the "normal" splitting I see on the other Maple tree right now. NOTE: It's been raining all day. That second photo is ...
2
votes
1answer
49 views

What are these red bumps on my cherry tree stems? [duplicate]

Tiny red bumps started appearing on my multi-variety cherry tree. They only appear on new terminal stems. They do not move. At first, I thought it was scale pest, so I sprayed neem oil on them twice. ...
3
votes
2answers
60 views

How do you manage dying leaves on young plants?

If a leaf on a plant is shriveling or yellowing, should you cut it off or leave it there? If you do the former, should you only snip off the damaged parts or should you cut off the entire leaf? My ...
2
votes
1answer
33 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.
2
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1answer
51 views

How to heal this needled plant?

This little guy is suffering and I'm not sure how to help him out. Any ideas?
1
vote
1answer
63 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 ...
1
vote
1answer
35 views

questions on deep root fertilization

One of the dog wood trees in my yard does not grow healthy. The tree care professionals recommend the so-called deep root fertilization, and I agree to move on with this operation. Yesterday, ...
2
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2answers
66 views

Why did my red bell pepper become tan colored?

I planted a red bell pepper seedling that I bought from a local nursery a couple weeks ago. It has been growing rapidly and upright. One of the egg-sized vegetables had suddenly developed a large tan ...
3
votes
1answer
126 views

Why are the lower leaves of my tropical Guava yellowing and dropping?

I had a Century Guava (世紀芭樂) shipped over from Taiwan to zone 9 California. It is nearly 6 feet tall. I planted it in the biggest container that IKEA sold, 20 inches wide, 2 feet deep. I drilled many ...
2
votes
0answers
40 views

Red blob on kesar mango tree (grown from seed in UK) [closed]

Last June (10 months ago) I planted a Kesar Mango seed. After we cut of two leaves to stunt its growth, two branches grew (FYI). Now, a very small red blob has appeared on top of it (see picture). A ...
3
votes
2answers
70 views

How do I find out & treat what is eating my hibiscus leaves

I was wondering what might be eating away at my hibiscus and how do I protect my poor little plant. I don't visually see any bugs on or under the leaves. Update: This plant is in a pot. Location: ...
2
votes
1answer
84 views

Raspberry disease

My Raspberry has got some disease. Please see the picture. Can anyone advise me on what is this and how to treat it?
1
vote
1answer
52 views

What is this tan dried wood on my citrus tree?

On my tangelo tree, I have a lot of tan branches that are dried and don't have vegetation. What is causing this and should it be thinned off? I'm wondering if it has any relation to the desired tan ...
3
votes
1answer
56 views

Tomato Disease treatment

My Tomato leaves are getting Yellow. I assume it some sort of disease. Until now I just tried to spray garlic on them, but it does not help. How can I treat it?
2
votes
1answer
132 views

Repotting diseased chilli plants - possibly rust

My chilli plants appear to have developed rust after a bad attack from aphids! See photo below The leaves have also gone curly: My plan is to repot the plants, washing away the old soil and ...
1
vote
1answer
125 views

Chilli Plant Bugs/Brown-Purple Staining

I have an indoor jalapeno, cayenne and birds eye chillies which I planted from seed and moved indoors at the end of summer. They have become infested with tiny bugs which live on the bottoms of the ...
6
votes
2answers
313 views

What is happening to the leaves of my avocado?

I have an avocado plant in my outdoors balcony. It's been growing nicely, but there are small brown dots/holes in the leaves for some time now. I don't see anything in the underside of the leaves, and ...
4
votes
1answer
118 views

What is wrong with my lemon tree? [duplicate]

Below is a picture of my lemon tree, which now have some sticky web infection. See left corner on the first picture. On the second picture is a close up of something that is being spread from the ...
3
votes
1answer
99 views

Is this disease or sun damage on my Japanese maple?

There are dark-rimmed grey/white patches on my recently gifted Omurayama Japanese maple. Is this due to disease, or simply sun damage? There is the uncommon hole on leaves rimmed with the same ...
4
votes
2answers
47 views

Why are my plants doing badly for the 2nd year in a row?

I live in Marin Co. California, where summers have been mostly hot and dry, winters mild with rain. All my plants are in pots, excepting the trees that were already here when we moved in 15 years ...
1
vote
1answer
78 views

How Can I remove leaf eater insect from the lemon plant

There is one lemon plant in my house where in each season there are lots of lemon are to be produced. But in this time I figured out small leaf eater insect on the plant which is eating the leaves of ...
2
votes
1answer
204 views

What are these black spots on my rose tree?

If I press these little dots, there is a white cream-like substance inside. Some leaves are completely eaten, but I am not sure if it is linked. This plant, a rose tree, had fallen on the ground ...
2
votes
1answer
87 views

What is this black spotted disease on my orange tree?

Is this mushroom or animal? I can remove the black dots by slightly scratching the leaves.
2
votes
1answer
83 views

Is green tissue in the center of cherry tomatoes related to 'Yellow Shoulder Disorder'?

I've read about the "Yellow shoulder disorder" in tomatoes, and I was wondering if I have something similar going on with my cherry tomatoes. Some of them do indeed seem a little less colourful on ...
3
votes
1answer
98 views

What are these weird lumps on this spruce tree?

There's a spruce tree growing in a park near my house. It has lumps like this on a lot of the branches. After a while, some of the lumps look like this: Is this a disease, or just a part of the ...
6
votes
3answers
2k views

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 ...
2
votes
1answer
50 views

What is the disease or organism that is causing this issue with my raspberry plants?

the stem is affected for about 1 inch normally near the tip. The tip is dead/wilted and there seems to be a distinct patter of a ring at the top and bottom of the "eaten" area.
2
votes
1answer
413 views

What's causing the bark on my maple sapling to split?

I planted a Maple sapling in my front yard in November 2011, and it hasn't shown very much growth since. It gets leaves during the spring, but they seem to fall off earlier than all the other trees in ...
2
votes
1answer
219 views

What is this yellow coloration of cotton wool used as growth media for hydroponics?

I have built a simple hydroponics DWC system, using a window box with aeration. Actually a system exactly like the below picture: I am growing lettuce and cabbage, and a week ago I have ...
5
votes
1answer
1k views

What is this white mold infesting my tomato plants?

Some kind of white mold is infesting several of my plants, below is one of the worst infections of a tomato seedling. It is very aggressive, if I remove the top layer of soil it will come back in a ...
7
votes
3answers
1k views

Grapevine leaking water and white mucus

Problem While I was recently helping my mother prepare her garden for the spring, I discovered that the leak on her porch was not actually coming from the overhang above the door, but rather from a ...
2
votes
5answers
2k views

Why are my cucumber leaves turning yellow?

My cucumber plant's leaves are turning yellow. Could it need nutrients already? It only germinated 24 days ago, but is my biggest plant already.
4
votes
1answer
185 views

What is this opening on the bottom of my tomato plant's stem?

I'm trying to grow my own tomatoes from seed, and they're getting quite big now. So naturally, the first problems start to pop up. Like this: Can anyone tell me what it is, and if I can do ...
2
votes
1answer
400 views

My Air Plant (Kalanchoe Pinnata) is attacked, how do I save it?

My Air Plant (Kalanchoe Pinnata) is attacked by little green worm like insects which are eating its leaves. Slowly one by one, all of the leaves are dropped by the plant, now it is left with just ...
3
votes
2answers
251 views

Is My Tree Dead?

The bark is falling off my tree. Is the tree dead? Diseased? Will I have to have it removed? Please see the pics: Click on any photo for full size
4
votes
2answers
254 views

What's killing this succulent?

The death toll of plants in my apartment continues to rise, having lost both a miniature rose and a rosemary plant to powdery mildew. Now something's killing one of my succulents. It was fine when we ...
2
votes
2answers
1k views

Schefflera arboricola , seems to be withering and dying, help!

I am not sure what is wrong, the plant seems to be rotting and withering from the top down. The tag says that it is a bush but it has grown to 5 feet or more in height. I tried trimming back the ...
1
vote
2answers
126 views

Monstera Something or other with brown crud on the leaves

I have a pot plant with Swiss cheese kind of foliage that has got some problem possibly some sort of parasite or fungal infection, I have no idea. It's like red-brown rust that brushes off fairly ...
0
votes
1answer
693 views

What is eating my ivy?

something is eating the ivy that covers a wall of my house. Is it a disease of is there something hiding that eats the leaves. And what can I do to heal my ivy? You can see an example of the damage ...
7
votes
1answer
4k 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 ...
5
votes
1answer
425 views

What's causing these yellow veins on my Okra leaves?

My Okra leaves have turned as shown below Is this a deficiency or a disease? How can I remedy this? Location: India. Weather In May-June: Hot! > 95F days. Current: Overcast with light rains.
7
votes
1answer
1k views

Is something wrong with my zucchini plant?

I have three large zucchini plants in my garden, and all three have been producing nice fruits for a few weeks. The last couple days, one of them has started to turn yellow and sickly: I've never ...
5
votes
2answers
273 views

What is this disease on the growing tips of my peppers, and how can I control it?

Please have a look at these images of my hot pepper plant. Notice the growing tips which seem withered and diseased. What disease is this and what is causing this? What are the solutions to counter ...
3
votes
2answers
954 views

What causes my zucchini-leaves to become light yellow?

Please have a look at these images of my zucchini plant: What disease is this and what is causing this? What are the solutions to counter this? Location: India. Weather In May-June: Hot! > 95F ...