Questions tagged [diseases]

For questions related to plant diseases.

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3
votes
1answer
95 views

What is wrong with this Strawflower?

I have a tom thumb/dwarf strawflower growing in a gallon plastic pot. It's not supposed to get higher than 15 inches and the plant next to it came from the same packet. It only has a few flowers on it,...
3
votes
1answer
843 views

Cactus with brown and white spots. What is the problem?

My cactus has had this brown spot on its side for a couple weeks now and I don’t know how to fix it. I think it happened when I was away for a month and forgot to have someone care for it. The house ...
2
votes
1answer
171 views

Cauliflower : What is happening to these curds?

I am growing cauliflower(single plant) at my home in India. I have attached the image of the same. The head formed two weeks ago and i have started to see some pinkish- brown spots on the head. Can ...
4
votes
1answer
47 views

Why does my nectarine tree have rotting fruit around seed?

My nectarine tree has grown rapidly, it has been a great fruiter, however the fruit is always brown & rotten inside around the seed. Please help!
2
votes
0answers
219 views

What are the brown spots on my apples? [closed]

For a while now my apple tree's fruit has been growing with brown spots all over them. The more they grow, the worse they look. I'm wondering if this is a pest problem. Does this sound familiar to ...
6
votes
2answers
2k views

Why are some of my pumpkin plants wilting, and showing what looks like stem rot?

Up to this date we have had a healthy crop of about 500 flowering pumpkin plants, however, over the last 3 days we have lost maybe 20 of them. They will simply wilt over 24hrs and then die: Closer ...
5
votes
1answer
471 views

What is happening to our potato plants? (going black, wilting)

We have a row of 3 different heirloom potato varieties, 50 originally, of which we've lost about 15 to a problem we'd like to identify. The following photos show the start of the issue, through to a ...
5
votes
2answers
68 views

Silver birch has leaves falling off

The silver birch has leaves falling, which have some spotting on them. I’m wondering if the tree has some sort of infestation?
3
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0answers
39 views

How effective is a phosphonate treatment for phytophthora dieback?

I found on the Internet that the fungal disease phytophthora dieback can be treated with phosphonates. I am asking how effective this treatment is. If it's not very effective, is there any other ...
6
votes
1answer
15k views

My Areca Palm is dying

I bought a 5ft areca palm about a month ago. About two weeks after I purchased it, I noticed some leaves had spots and others were turning brown. Initially I thought it was normal but more leaves seem ...
6
votes
1answer
27 views

Root rot in Pseudotsuga

Friends of mine have a grove of 5 fairly closely spaced Pseudotsuga menziesii (Douglas fir) in their front yards which are about 15 years old. They are thinking about girdling the smallest to produce ...
3
votes
1answer
85 views

Abies koreana molli - diseased?

I bought Abies koreana molli tree (25 cm high) 3 month ago. Im keeping it in my flat at the balcony door (so it shoudl have enough light). Temperature in my flat is constantly at 18-20 degress of ...
3
votes
1answer
2k views

Red bugs, tiny webs and white powder on Tulsi plant

This is in south India. I purchased a Tulsi plant around 3 months ago from a local seller who told me he also had medicines for plants if I ever needed them. I asked what medicine, and he didn't know. ...
8
votes
1answer
467 views

What is eating the leaves of my rubber plant?

They were fine few days ago, now these almost transparent patches exist on the leaves. I inspected the leaves, and there is no bug I can see. But they look like they got chewed by some small insect. ...
3
votes
0answers
648 views

What causes dark brown spots on guava fruit?

I am from India and I see that young guava fruits have dark black/brown spots on them. I grow them at my home. I have attached photos of the fruits. Could someone help in identifying the disease and ...
6
votes
1answer
694 views

Brown spots around the veins on a hot pepper plant's leaves

I noticed this on some on my Carolina Reaper plants. A lot of the leaves have this kind of spots surrounding the midrib and the veins. The plants grow indoors in 5l pots but I kept them in the garden ...
4
votes
2answers
116 views

Burnt appearance on maple

I have a maple at the front of my house, getting mostly the morning sun and also relatively close to the house. So I don't think it's getting burnt, however, it does have a black/burnt look at the ...
6
votes
2answers
1k views

What is the white residue spreading across my dracaena and how do I treat it?

I have a white residue spreading across my dracaena at home. I tried wiping it with wet sponge when it was on one leaf only but its come back and spreading across now 50% of the plant. Some of the ...
4
votes
1answer
114 views

Does my Philodendron have warts?

My Philodendron has little black spots that look like warts on the stock/stem. What could it be?
2
votes
0answers
223 views

How to combat a disease taking over my Ficus Religiosa tree

I come from the tropical and temperate climate of Southeast Asia. I have a lovely Ficus Religiosa that sprouted in a small pot on my balcony naturally at about March this year. I transplanted it to a ...
4
votes
1answer
125 views

Sweet potato leaf disease?

I managed to get some slips started from a store bought (treated) sweet potato in May this year. Took a very long time to get going but eventually got 3 slips started. One of the three has two leaves ...
6
votes
3answers
3k views

Tomato branches curling

What is the cause or cure to the branches curling on my tomato plants? Aside from the curling they are growing, flowering and starting to fruit. It is the beginning of our tomato season as it is ...
4
votes
2answers
52 views

Cotton-Like Disease on Fallen Limb

I'm going to start by saying that I've tried to look this up online, but I'm not knowledgeable about trees and so I came up empty handed. This limb just fell off of this tree in the front yard. It's ...
7
votes
1answer
101 views

What is wrong with these pine trees?

There are a line of pine trees in my development, and two of them seem to have a disease. I was hoping someone could identify what is wrong with them. They seem to both have the same problem (part of ...
6
votes
1answer
142 views

What is this tomato disease?

I showed it at my local garden center, but they said its normal for old leaves. But I think its some disease, as the new growth also gets similar blackening of leaves within weeks. This only happens ...
5
votes
1answer
55 views

Why would a broccoli plant have grey patches on only a single leaf?

I'm making a temporary garden for a client at home to move to the landscaping location. He requested his garden contain broccoli which is the plant I'm worried about currently. It seems to have grey ...
3
votes
1answer
87 views

What are the purple streaks and splotches in my peach tree leaves?

I live in Southern New England and have a peach tree growing in the ground in my yard. I have had it for about two years. The weather this summer has been fairly warm, averaging mid to upper 80s. I ...
7
votes
2answers
2k views

What disease is causing yellow bumpy leaves to travel down my sugar baby watermelon plant?

I have a sugar baby watermelon plant. The leaves have a problem near the main stem coming out of the ground, and it's clearly traveling down each vine. It is yellowy brown and bumpy and covers the ...
3
votes
2answers
70 views

How do I use a suggested spray for white fungus on my pumpkin plants?

I've got 3 pumpkin plants growing and they're pretty huge and producing. The white fungus is pretty bad so I'm using a suggested spray, and I hope it works. The spray is 1 tablespoon each of baking ...
3
votes
1answer
22 views

Can I do anything about horse chestnut leaf miner?

I have a young horse chestnut tree in the garden, about twelve feet tall. Most of the leaves are discoloured by leaf miner. Can I do anything? I am in London UK.
7
votes
4answers
1k views

Succulent Disease Identification (kalanchoe beharensis)

Album of pictures Another album of updated pictures One leaf before being "washed" with a mild soap/water mixture Another leaf after being "washed" with a mild soap/water mixture I purchased this ...
5
votes
1answer
2k views

Indoor Peace Lily soil suddenly covered in white spots

My 3 year old peace lily has been in this clear pot for almost a year and within the last few weeks these spots began appearing near the roots and now cover the soil on the top layer. The spots are in ...
2
votes
2answers
388 views

Disease on peach fruit

Are the pink spots on this peach flesh some sort of disease? I got these from family who bought them at a farm stand in CO. The first one I ate had normal flesh, but the next two have looked like this....
4
votes
3answers
483 views

Prickly Pear Cactus is growing what looks like rot (need help)

Prickly Pear Cactus is growing what looks like rot (shown in the attached pictures) where it's getting a yellowish color in the place these things appear. Is this normal? Is it dangerous? What is ...
6
votes
3answers
177 views

What is this parasite / mushroom / sickness on my crabapple tree?

My crabapple tree is having a hard time. It's fighting Japanese beetles, spider mites and now this "thing" on some leaves. It starts by creating a red spot on the leaf and eventually there's some "...
3
votes
2answers
221 views

What is wrong with this Shaina Japanese Maple

This tree used to be red when I bought it. Like my other Japanese maple (Coral bark) it lost its original color. I understood that this might be either because of the stress induced by replanting the ...
3
votes
1answer
62 views

What are these marks on pepper leaves?

My wife and I have noticed this on some leaves. Her plants had ~30 leaves like this, and mine had one that showed up yesterday (I think I'm gonna clip that leaf just in case). These pictures above ...
3
votes
0answers
2k views

Brown spots on herbs - treatment and are they ok to eat?

The leaves on all my garden herbs (mint, sage, oregano, thyme, lemon balm) get yellow-brown speckles from late spring, which by late summer almost entirely cover the leaves. What might this disease (...
4
votes
3answers
201 views

Help Identifying Basil Plant Problem

I have three potted sweet Basil plants in my backyard. Two of them look great, but the middle one is a lighter green color and has browning and curling leaves. I live in zone 6. I grew them from seed. ...
5
votes
1answer
546 views

Disease on a Pine tree? Or is it Bugs?

We moved into a new house last year, and this summer we are noticing that the tree is oozing a lot of sap and has began to drop pine needles while other needles are starting to turn a light brown ...
3
votes
1answer
60 views

Is there anything wrong with my raspberry (heritage everbearing, zone 7)

I'm trying to find out if there is something wrong with my raspberry plant. I was gifted with this plant about two weeks ago. It did have some damaged canes which had to be cut away, but I do not ...
4
votes
1answer
158 views

What's wrong with my Scarlet Oak tree?

My poor Scarlet Oak (Quercus coccinea) tree started getting brown/yellow leaves with holes in them. Any ideas as to what the problem is? It's been really dry and the tree is less than one year old in ...
4
votes
1answer
2k views

Should I be worried about brown spots on my mint leaves?

Found some brown spots on the old mint leaves on my new planted cuttings. Is this normal or a sign of disease? They're planted indoors at around 70°
4
votes
1answer
1k views

Why are some of these Yew bushes dying?

I have a row of yew bushes, some of which are not healthy at all! I’m in Pittsburgh, PA and have lived in this house 15 years. These bushes used to be healthy (I have old pictures), but over the past ...
5
votes
1answer
156 views

What pest is this and how do I treat it?

This pest appeared on the squash plants yesterday. What is it? How do I treat it? Zone 6 near Boston, Massachusetts.
3
votes
1answer
102 views

What is this growing on my orange tree

I was adding root stimulator to my orange tree today and noticed this spot on the stem. Can anyone tell me what it is? Edit:
2
votes
0answers
3k views

White spots on basil plant? [duplicate]

My basil plant started getting some white spots a couple of weeks ago. I cut the leaves that had the white spots but the new leaves are growing again with the same white spots. Also, it's weird ...
4
votes
1answer
684 views

What white weed/fungus is in my lawn?

Looking for help / diagnosis of this issue that is creating white patches in my lawn. Charlotte, NC area.
5
votes
1answer
207 views

What caused this grass to die and how can I treat it

Trying to identify what has happened to my lawn. The first image with the long stripe was irrigated well so I don't think this is drought related. This is a Florida lawn with St Augustine and ...
3
votes
2answers
2k views

Cactus growing white hard coating

One of my cactuses has been gradually growing a white coating, and the lower outgrowths seem to be shrivelling up and fading, I first noticed this about a year ago and it hasn't stopped no matter what ...