For questions about plant diseases.

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9
votes
3answers
2k 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 ...
4
votes
1answer
97 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
votes
1answer
61 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
127 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
37 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, ...
4
votes
1answer
391 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 ...
4
votes
1answer
68 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?
1
vote
0answers
55 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
164 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: ...
7
votes
2answers
499 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 ...
2
votes
1answer
128 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?
2
votes
1answer
78 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 ...
1
vote
1answer
311 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 ...
11
votes
1answer
8k 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 ...
4
votes
1answer
254 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 ...
4
votes
2answers
58 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 ...
20
votes
6answers
364 views

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. ...
3
votes
1answer
309 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 ...
1
vote
1answer
94 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 ...
6
votes
2answers
9k views

Why does my blueberry bush have brown/scorched leaves?

I recently purchased a dwarf Northsky blueberry bush from a mail order company. When I recieved it, roughly 15-20% of its leaves had the appearance of being burned or scorched; the bad leaves were ...
3
votes
1answer
133 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.
7
votes
1answer
2k 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 ...
2
votes
1answer
97 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 ...
2
votes
2answers
2k 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 ...
4
votes
1answer
115 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 ...
2
votes
5answers
3k 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
61 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
532 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 ...
4
votes
1answer
215 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
587 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
339 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
8
votes
2answers
2k views

Why is my pear tree dying around the blossoms?

Shortly after the blossoms fell on my pear, areas around the blossoms started to turn black and die. This is spreading. Although the dead areas tend to be on the end of the branches, there are ...
9
votes
2answers
629 views

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 ...
2
votes
1answer
898 views

How should I treat Frangipani rust?

My frangipani experiences rust. How should I best treat/protect my plant from rust (all year round)? My plant experienced severe rust during December/January (Australian Summer). It was a very wet ...
2
votes
2answers
146 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 ...
1
vote
1answer
935 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 ...
10
votes
1answer
6k 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
588 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
796 views

What is causing diseased leaves on my French beans?

My French bean plants have diseased leaves as shown below: What can be causing this? The beans themselves are relatively plentiful. Location: India. Weather In May-June: Hot! > 95F days. The ...
5
votes
1answer
806 views

White stuff on roots

When I uproot my vegetable plants or even sometimes when I remove weeds, I see this white stuff in the soil near the roots: http://imageshack.us/photo/my-images/717/img1014be.jpg ...
6
votes
2answers
192 views

How to prevent rotten end of tomatoes [duplicate]

Possible Duplicate: What else besides calcium deficiency could be causing tomato blossom end rot? Each year my tomatoes develop a brown rotten area on the bottom of the fruit. I always add ...
7
votes
1answer
431 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 ...
5
votes
1answer
145 views

How to recover a stressed hemlock?

I have a well-established hemlock tree in my yard that has started producing large quantities of cones. This is apparently a result of it being "stressed" (according to a nursery worker and a ...
11
votes
2answers
2k views

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, ...
5
votes
1answer
3k views

What is causing the bark on my crabapple to crack and peel off?

I have a flowering crabapple in my yard whose bark has several large areas where it cracks and curls away from the wood underneath: Hover over any image for description / click for full size I ...
3
votes
1answer
154 views

How long until the fireblight is gone?

Our fruiting quince tree has fireblight. We've been trying to control it by pruning, but it's not working. We're going to have to take out the tree. I can't buy quince fruit, so I want a quince ...
6
votes
1answer
267 views

Basil: cold or disease?

A few days ago I put my basil outside. In a couple of days, the temperature fell considerably, and I think it got a shock, despite moving it back inside as soon as I could. I think this is the reason, ...
3
votes
1answer
168 views

What is this disease on my peach leaf? [duplicate]

Possible Duplicate: What is the problem/disease that causes bobbly peach tree leaves? As I was spraying my peaches, I found this ugly pink puffing on my peach leaves. What is it and how do ...
4
votes
1answer
263 views

What are these black spots on white splotches appearing on my tomato seedling?

Here are pictures of the infected leaves. I cut them off the plant as soon as I saw them today. Click for full size Here are close-ups of the most infected leaf: Click for full size What can ...
3
votes
1answer
544 views

What is this disease on my Basil?

I've planted Basil (from a pot) outside and it's been very wet in the last few weeks. The plant has now got these grey spots on it. What is wrong with it?