For questions related to plant diseases.

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3
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1answer
39 views

Tomato Plant Stalk Appears Diseased

Found this in my garden today: My tomato plants appear to be quite ill. The lower stalk is covered in bumps, and it looks like they start at the base. Most parts of the plant are fine, but I am ...
3
votes
0answers
76 views

What is this substance that looks like red sap on my cucumbers?

I have this weird red sap on a few of my cucumbers. I was wondering if anyone has seen this before? These cucumbers were grown in our conservatory in the back garden (facing south) in pots, grown up ...
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0answers
28 views

How to keep cucumber beetles/bacterial wilt from spreading when removing infected plant?

I have some cucumber plants that are very infested with cucumber beetles (mostly striped, some spotted). The plants are dying from bacterial wilt, and although it's hard to access all leaf surfaces ...
3
votes
2answers
62 views

Abnormal tomatoes on my tomato plant

I have a few tomato plants growing in a raised bed. I grew them from seeds. For some reason a few of the tomatoes don't look normal ( see pictures). Also the size of the fruit is much smaller than I ...
3
votes
1answer
53 views

Cucumber with bacterial wilt, what to do to save other plants?

On Saturday, my cucumbers looked perfectly healthy. On Sunday, half of one of my cucumbers had very wilty leaves. On Monday, the other half of the cucumber's leaves were all wilty. I have seen ...
1
vote
1answer
23 views

What should I do to prevent plant diseases from spreading while having them live close together?

Is there any good guidelines for how to space plants so that you can prevent plant diseases from being spread between plants, while still having them able to work together in order to pollinate each ...
8
votes
5answers
137 views

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. ...
1
vote
1answer
29 views

Is my tree diseased? Can I cure it?

I have a two-year-old apricot tree about six feet tall growing in a salvaged water tank. Many if not most of the leaves have one or more of little "blisters" on their stalks, as shown below (each ...
5
votes
2answers
50 views

It is good to use water of a pond to irrigate my garden?

I am growing some vegetables in my garden and I also have a pond where some turtles and fish live together. I thought maybe when I change the water of my pond could I use that water to irrigate my ...
5
votes
2answers
112 views

What is wrong with this Magnolia

we have this medium sized magnolia in a pot since a bit more than a year. It survived the winter with us ocassionally taking it inside the house to prevent it from frosting. When spring came it ...
4
votes
1answer
182 views

What should we do with a 7-8 year old honey locust tree that has been damaged by disease?

2009 diseased honey locust: June of 2016 full view: We have a honey locust that developed a disease within it's first year and an arborist saw it. He told me it is what they call herpes for ...
6
votes
1answer
69 views

Why are my basil's stalks turning brown and dying?

I googled and it seems that basil does turn woody after some time but the leaves on these browned stalks look really unhealthy, like I haven't been watering them. Also, the stalks got thinner after ...
3
votes
1answer
108 views

Why are my morning glories stunted/deformed?

I planted some morning glory vines (Ipomea sp.) outdoors in a box about 10 weeks ago (mid-March, I'm in Zone 8) and they've been underperforming the whole time -- the vines are not even a meter long, ...
5
votes
1answer
155 views

Orange spots on Polypodium

A few months ago I asked a what kind of plant my office plant is and how to take care of it. I got a clear answer on that recently, but I just discovered orange spots on some of the leaves (NOT ALL!). ...
3
votes
0answers
155 views

Beet plant - leaves turning yellow-brown

I have a beet plant that I grew from seeds. They started off great and healthy. In fact I plucked some leaves to use in a salad. After that some of the leaves are turning yellow and drying up. What ...
4
votes
1answer
56 views

Diagnosing if a tree is dead

I found a very large branch in my yard. Looking up, I was surprised to see a a bare tree amongst the leafy ones, from which this branch had fallen. Not a tree expert but I'm guessing this one is ...
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0answers
48 views

Brown spots appearing on roma tomato leaves

Three weeks ago I bought a roma tomato plant from Home Depot. It was probably about 8 inches tall. Since then, it was in my apartment for a few days and then my friend's apartment for about two and ...
1
vote
1answer
43 views

Spots on marigold leaves

I was sprouting some French marigolds and noticed some spots on the leaves. They didn't look good, especially since one of the plants didn't get them. I looked them out on the internet and figured it ...
4
votes
0answers
51 views

How to start over-pachysandra decimated

I had a beautiful, thick, well established patch of pachysandra in my yard that is now decimated. To put it mildly, I don't have a green thumb and since I have a full time job and three young kids I ...
8
votes
1answer
54 views

What is this Apple disease?

Close up of lesions Close up stem side I've had this Apple tree for a couple of decades which I had always assumed it was wild since it had always produced sour small apples. For some years the ...
6
votes
0answers
34 views

How do I eradicate Pseudoperonospora cubensis on roses?

I have some roses that look like they are infected with Pseudoperonospora cubensis. I currently do not know how to treat this disease and would like a course of action. I have not applied any ...
6
votes
0answers
37 views

Are these brown areas on my dracaena leaves a disease? [duplicate]

My dracaena has several leaves with this kind of quite big brown areas on them: Photo source Does this look like a disease or might it be only bad caring? I have a separate post related to ...
4
votes
1answer
49 views

Is this the tomato potato psyllid?

I noticed these sugary white granules on my tomato leaves a couple of months ago, and saw some insects which I thought were aphids but didn't look closely. Now it looks as though my potatoes are ...
7
votes
3answers
116 views

Dying Lawn - brownish/white with moss and clumps

I am trying to figure out what is killing my lawn. The pictures below were taken a few days ago.There is only the one area of this occurring and the yard is about 1/2 acre. The dead area has been ...
5
votes
2answers
74 views

How can one prevent baby/recently sprouted plant disease?

When one desires to germinate seeds in the seedling tray, he/she has to keep a humid and warm environment. But this environment is also favored by fungus. Other than sterilizing the soil, how can one ...
5
votes
3answers
293 views

Disease / pest identification

What could have caused the damage in some of the leafs of this pothos? Fungus? Drought? Pest? Factors: It appeared suddenly, at the end of winter time, beginning of spring It is an indoor plant, ...
5
votes
2answers
54 views

Weird growth on wisteria stem

See attached picture. Is this growth normal? If not, what do I do?
7
votes
1answer
59 views

Can I use waste water from kitchen for plants? [duplicate]

Can I use the waste water mixed with dish washing liquid from kitchen for watering my garden?
5
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0answers
39 views

Unhealthy plant with dark spots on leaves

See attached plant. Leaves seem to have some issue as identified by dark spots. Any idea what could be wrong?
5
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2answers
78 views

Is powdery mildew spreading through my garden?

I noticed this white fungus a few weeks ago on some flowers in my garden which I ignored. But now it's appearing on my zucchini leaves. I was under the impression the fungi are plant specific, but ...
9
votes
2answers
175 views

Why are the leaves on my houseplant turning yellow and getting black spots?

I have this shade plant in my home. The leaves are becoming dry, turning yellow and developing black dots on them. I don't know whats wrong with it. If it's a lack of food, I can give it compost, ...
7
votes
2answers
87 views

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 ...
7
votes
1answer
157 views

Kentia palm dying. Advice? :(

I bought a kentia palm some months ago, and during the last week one stem/group of steams is turning out yellow. Also there are some big white stains on the leaves. Some leaves also have small white ...
8
votes
1answer
99 views

Is this powdery mildew on my tomato?

Just noticed this on my store bought plant (not grown from seed). It's now fruiting, and I don't see any white spots on the leaves. Update: 25 Feb 2016 with close up of the stems and an more ...
5
votes
2answers
146 views

How to treat a Jade plant with yellow leaves and holes in its leaves?

My succulent has developed some weird disease, first it only looked as if something was eating it but then the leaves started turning pale and yellow.. I never fertilize it and I irrigate it once a ...
4
votes
1answer
69 views

How to Control Tomato Hornworms?

I've sprayed my plants with DiPel DF as a way of controlling Tomato Hornworms. (The Dipel Solution called for 2 to 4 teaspoons per 32oz of water.) It killed the hornworms effectively; however, it's ...
4
votes
1answer
57 views

Is this sunburn or something else?

I've put my cacti for wintering into an unheated attic, by a window where the sun falls after 2 P.M and till dusk. Since it's negative temperature outside (so it's already winter in a sense) I didn't ...
3
votes
0answers
49 views

What is causing dark spots on my tomato leaves? [duplicate]

I have a couple of matchless determinate variety tomatoes in grow bags. I am from Chennai, India (hot, humid and it's monsoon time now). It's been raining the past week. I applied Monopotassium ...
3
votes
3answers
180 views

What is the white stuff on this cactus-type plant?

I have had this plant for more than 10 years now but I do not know its name. What is the name of this plant? The issue is that this plant has a lot of white areas, as shown in the pictures. These ...
5
votes
1answer
86 views

Why are the leaves on my capsicum plant curling and turning brown?

Does anyone have any idea what's happening to my capsicum plant and what I should do about it? There are no visible bugs on the leaves.
9
votes
2answers
130 views

What is causing irregular brown sunken spots on my tomatoes?

I have been growing tomatoes in the same spot in my garden for years. This year most of my tomatoes seem to be affected by a disease which only affects the tomatoes. I prune, water & fertilize the ...
6
votes
1answer
43 views

Can rubber gloves spread plant diseases?

I use thin rubber gloves when gardening. It's autumn here in zone 6, and I'm in the process of pruning and pulling up spent perennials and all manner of wildflowers which have been growing since the ...
4
votes
1answer
412 views

The leaves of my persimmon tree are turning brown

I planted the persimmon tree last November which was about 4 years old. The tree seemed to be ok until July this year. Then, I recently noticed that a majority of the leaves on the tree have been ...
2
votes
0answers
60 views

Plants Fungus Infection

I am new to garden and I have a tomato plant that is infected by fungus. I would like to ask how fungus infects the plant? Does the disease affect the soil, plant or both?
3
votes
1answer
965 views

Peace lily flowers are turning black

Why is my peace lily flower turning black? It's the white flower not the green leafs that are turning black.
2
votes
1answer
148 views

What is causing the curling and brown spot on my Philodendron Congo Green?

I just purchased this plant last Sunday. I repotted it and watered it the same day. Since then the leaves have begun to curl and one of the leaves is developing a large brown spot. The temperature in ...
2
votes
1answer
228 views

Caladium plant leaves turn yellow

I have bought a Caladium Plant last week. When I was potting her, I accidentally cut a few roots. When I saw some of her leaves wilting I associated it with my clumsy hands. But just today I noticed ...
5
votes
1answer
152 views

What are the black spots on my paw paws and how do I treat them?

I have six paw paw trees, all of which were going fine, then almost all together started to develop these black spots on the leaves and fruit. It has progressively gotten worse, and caused most of ...
3
votes
2answers
93 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 ...
0
votes
0answers
20 views

Small brown scales on my lemon tree [duplicate]

My small lemon tree has been showing these scabs for a while. They are brown, mm sized, and fall off very easily just touching them with a finger or a nail. Examining the soil with a lens I also noted ...