For questions about plant diseases.

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7
votes
2answers
43 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
31 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 ...
5
votes
0answers
31 views

Is this powdery mildew on my tomato?

Just noticed this on my store bought plant I.e. not grown from seed. It's now fruiting, and I don't see any white spots on the leaves.
5
votes
2answers
45 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
59 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 ...
3
votes
1answer
42 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 ...
2
votes
0answers
36 views

What is causing dark spots on my tomato leaves?

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 ...
2
votes
3answers
84 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 ...
2
votes
0answers
50 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.
5
votes
2answers
89 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 ...
4
votes
1answer
33 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 ...
3
votes
1answer
106 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
45 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?
2
votes
1answer
112 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
67 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
58 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
105 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 ...
2
votes
2answers
61 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
15 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 ...
6
votes
1answer
93 views

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 ...
1
vote
1answer
48 views

Is this Fusarium Wilt or nutrient deficiency or something else?

My basil plants have recently started spotting on the leaves with a couple yellow leaf drops and streaking on stems. Is this a disease or some other issues? Full Gallery of photos A few details: ...
5
votes
1answer
96 views

Raspberry leaf curl disease? Can this be treated or prevented?

About a 1 1/2 months ago I ordered and received a live raspberry plant from Burpee. Burpee lists the plant as Crimson Night Raspberry PPAF. My understanding is that this raspberry is a variety ...
0
votes
2answers
38 views

Biological degeneration due to inbreeding among plants?

Is there such a thing as biological degeneration due to inbreeding (incest) among garden plants? For instance, if the quality in a bed of calendulas diminishes somewhat year-after-year, could this be ...
3
votes
3answers
160 views

What's wrong with my tomato plant?

This is a Great White plant, planted about 30 days ago. It has yellowing leaves with black spots, all tge leaves are drooping, and there are very few flower buds. I'm afraid I might need to dispose of ...
4
votes
1answer
59 views

What methods can be used to apply an antifungal to the interior of a tree?

Diseases such as the Blue Stain Fungus infect trees from the inside out due to inoculation by host insects. Are there any effective/standard methods for applying antifungal compounds to infected ...
4
votes
1answer
93 views

Rose bush diseased or natural (new growth or rose rosette?)

We were told the red leaves on this rosebush indicated disease and needed to be trimmed. Can anyone confirm or explain?
8
votes
2answers
121 views

Is my mint plant dying or diseased?

About a week ago I decided to propagate a healthy stalk of mint that I had bought from the grocery store. The roots appear to be healthy and full, but two of the leaves appear to be abnormal. One of ...
5
votes
1answer
42 views

Controlling curly top disease in sugar beets

Last season, curly top virus caused a significant decline in the quality of sugar beets grown in my garden as well as tomato. The steps I have taken so far include spraying with a preventative ...
6
votes
2answers
105 views

To prune or not to prune tomato's lower leaves?

I battled early blight last year, so this year I laid down a thick bed of grass clippings as mulch in my raised beds to prevent splashing of the dirt onto the plants. Last night, simply out of habit, ...
4
votes
1answer
103 views

What has caused this strange growth on my euonymus?

We have an otherwise apparently healthy euonymus in our garden, but a couple of branches have gone very pale, wide and flat with tightly bunched stunted leaves on the end. What causes this and is it ...
4
votes
2answers
292 views

Black spots, curling leaves on potatoes, help identify problem

First, some relevant information: I am growing Yukon Gold potatoes. I am in hardiness zone 6b. The weather over the last month has been dryer than normal for the area I am in (Northeastern US). I ...
4
votes
1answer
251 views

What is the white substance on my hibiscus?

We live in Southwest Florida. About a month ago, or maybe a little longer, I trimmed back our hibiscus plants. Today, I just noticed this mass of white, almost looks powdery, substance on the branches ...
3
votes
0answers
114 views

What is causing brown spots on my mint plant?

I have been rooting my mint in water and it rooted, then I found those brown spots appearing. It happened with all the mint plants I had before. I am in Egypt, and it gets morning sun and no afternoon ...
1
vote
0answers
50 views

My large pine tree is indenting at the bottom of the trunk [closed]

My large pine tree is starting to indent near the ground. The bark in some spots can be pulled off easily. The pine tree is the type that branches out. What could the issue be ?
2
votes
1answer
38 views

Can Psorosis spread via the soil?

My citrus tree has Psorosis, and I am thinking about cutting it down and putting a new tree in its place. But I am concerned that the disease will spread via the soil. Does Psorosis spread through ...
2
votes
1answer
500 views

What is wrong with this tomato plant with yellow and black spotted leaves? [picture]

What is wrong with this tomato plant? The yellow with black spots has been spreading through the plant. I am hoping someone knows exactly what this is and how I can treat it or prevent it.
2
votes
0answers
46 views

White map-like tomato leaves (hydroponic) manifesting [duplicate]

I am growing cherry tomato using kratky hydroponic method and ive seen these map-like lines manifesting on a number of leaves. I had to remove the infected leaves to control the infection if you will. ...
3
votes
2answers
40 views

Why did these plants dry/burn?

I bought a small venus fly trap kit to sow. Three of them sprouted and they were growing well. I had placed them at a south facing window, watering them every few days. I found them like this a few ...
2
votes
1answer
94 views

Tiny black flecks on squash and okra

What are tiny, size is the size of a tip of a needle, black flecks on squash and okra plants? What needs to be done to save the plants?
2
votes
1answer
77 views

Is this a desease or pest on my pepper-seedlings?

Today I noticed on my pepper seedlings that some of the leaves have on their bottom-side close to the steam some light-green-dots. To my uneducated eyes this looks like something is hatching inside ...
1
vote
1answer
132 views

Why would one tomato plant be full of tomatoes and the other one be empty?

I planted two tomato plants in my first garden and one has developed about a dozen green tomatoes ranging from marble-sized to 3/4 tennis ball-sized but the other, same exact species, has no tomatoes. ...
2
votes
1answer
27 views

What kinds of pathogenic plant mildew are there, besides powdery & downy?

Are there any other kinds of mildew that affect garden plants besides powdery mildew and downy mildew? If so, what are they?
5
votes
3answers
188 views

What's causing the edges of my blueberry leaves to burn?

Last year, this Sunshine Blueberry plant was doing stupendously - not a burned leaf in sight. Now most of the leaves appear like they're burning. Also, the fruit never mature to full size before ...
5
votes
2answers
58 views

white material on roots of apple tree?

When I dug up a young apple tree to move it to a sunnier location, I noticed some sort of white material on the roots. Is this cause for concern?
4
votes
1answer
313 views

Grapes leaves too dry - is that normal?

Recently I noticed my green grapes leaves don't look too good. There's nothing like scales or ants or any other sign of parasites. Only older leaves are affected, new ones are fine as you can see on ...
1
vote
0answers
61 views

What are the white specks on my Strelitzia's leaves? [closed]

I have a white fungus on my Strelitzia. It started as little specks on the leaves and I would like to know what it is, what caused it and what will get rid of it.
2
votes
1answer
140 views

Can any one tell me what are these white cotton like substances growing on these leaves?

My chili plant leaves have these white cotton like blobs growing on them. Is this some kind of disease? Sorry, for bad image quality.
2
votes
2answers
248 views

Can dragon fruit get scale?

I think that my dragon fruit has scale. This is my first encounter with scale so I want to check first. I assume that any plant can get scale. When researching it I never saw it mentioned on cacti so ...
5
votes
1answer
97 views

Should I rotate border vegetables, or plant a perimeter of onions/scallions each year?

Last year my wife and I planted our first ever organic vegetable garden (raised bed made of cedar) and pretty much just "winged it"; and surprisingly had very good yields. By "winged it" I mean, we ...
3
votes
1answer
80 views

Is this a sign of some disease or insect damage? (Piel De Sapo plant)

I tried doing some research into what might be causing the damage, as the vine is also damaged slightly. I looked around the rest of my garden and the winter melon and hairy melons are growing ...