Questions tagged [diseases]

For questions related to plant diseases.

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3
votes
0answers
20 views

Magnolia not flowering well

My Magnolia ‘Vulcan’ flowers are not looking right. Attached photos are all new growth (in Australia, just entering Spring). Any thoughts as to the issue?
3
votes
2answers
1k views

What illness/pest has this dipladenia and what to do with it?

I've successfully rooted 6 dipladenias 4 month ago, they are in pots since 3 month. All went well so far, but now it seems they have some illness or pests. (All the six, although in different progress)...
6
votes
2answers
590 views

What are these raised brown sections on the backs of the leaves on my pear tree?

I have this brown stuff growing on all the leaves on my pear tree in my garden. Does anyone know what this is? I think it might be some plant disease. Does anyone have any advice on fixing this?
4
votes
2answers
2k views

What is/are the probable cause/s of Avocado leaf curl?

It is known that Avocado (Persea americana) is vulnerable to viral, fungal, and bacterial infections, as well as disease due to nutrient deficiencies. The specimen pictured below is growing within ...
1
vote
0answers
26 views

My song of india plant have these light brown spots. What are they? [duplicate]

These brown spots are worring me please tell me are they natural or a symptom of a disease. They are just printed on the leaves.!
5
votes
1answer
142 views

Is this the cucumber mosaic virus?

We tried growing cucumbers in our backyard near San Francisco, California for the first time this year and have had all sorts of problems. We had to remove three cucumber plants because they seemed to ...
4
votes
2answers
299 views

How to tackle this disease on an apricot tree

We live in Vienna, Austria, very near the Danube river. We planted this apricot tree back in spring of 2015 as a small tree bought from a local nursery. It has been growing very quickly and was ...
2
votes
1answer
48 views

Camelia with virus?

What is the problem with this white camellia? Some leaves are getting completely yellow but the plant is generally very vigorous. Is it virus? Is there a treatment?
6
votes
1answer
308 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?
4
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1answer
5k views

Why has 20% of my pumpkin plant suddenly died and how can I save it?

So I had a thriving Pumpkin plant. For about a couple of weeks the big leaves in the middle of the plant (so the oldest leaves) started to yellow and get crisply on the edges. We've had 90 to 100 ...
5
votes
1answer
77 views

What’s happening to my grapes?

Just in the past week, just as my grapes are ripening, this powder is showing up on some of them, and some of the green stocks are showing some brown. What’s wrong and how do I fix it? The vine is ...
7
votes
2answers
2k views

Why do my Cherry tomatoes split as they ripen? [duplicate]

It doesn't matter what I do, my Cherry tomatoes always seem to have many of them crack when/as they ripen. I have tried everything - more sun, less sun, more water, less water, different varieties etc....
4
votes
1answer
553 views

What is this disease on my carrots?

I have just discovered that some of my carrots have this very dense presence of insects. Are they aphids? I have learned recently that ants love to grow aphids and I could notice some ants around ...
2
votes
1answer
97 views

Who is bugging this Deutzia Gracilis?

The depicted Deutzia Gracilis has apparently begun suffering from some kind of invasion. Who is bugging it (probably aphids) and how can this be fought off (preferably without "strong" pesticides)? ...
6
votes
1answer
2k views

Problems with fairy castles cactus

My beloved fairy castles cactus has been suffering for a while and I was wondering what could be happening now. It looks like having several different problems... specially worried as it looks ...
1
vote
1answer
3k views

Chilli leaf curl downwards

I have few chilli plants in a medium sized pot. Last few days I could notice some of the leaves are curling downwards and there is no color change. I am unable to find other issues in the plant. I ...
4
votes
1answer
2k views

Leaves are dying slowly on Raspberry plant-what on earth is wrong?

I am in desperate need of some help. I have been trying to figure out what is killing my Raspberry plants and have come up with nothing so far. Let me give some background information that may be of ...
3
votes
2answers
667 views

I was wondering if my Chocolate Mint plant had some type of disease?

So, I've had this Chocolate Mint plant for about a month now and some/most of the stems are brown. Some leaves on this plant also have brown spots on them, but not all are affected! So my question is: ...
5
votes
1answer
2k views

Why are large sections of bark peeling off these birch trees? Is it contagious?

I'm seeking information about what appears to be a severe problem affecting the bark of three trees, which I think are birches. They were found in July by my husband in a state park, about ten miles ...
3
votes
1answer
112 views

How to save a tree that is falling apart?

I have an issue with my trees. They have been gradually shedding bark and now it's to the point where a couple limbs have fallen off this spring. I've attached the pictures and hope someone will have ...
2
votes
1answer
1k views

Kiwi Actinidia arguta Issai black spots / patches on younger leaves

I bought 2 mini kiwi plants (Actinidia arguta Issai) online. It was delivered from Netherlands in case that matters. They are growing well except for black spots that seem to be spreading a little ...
5
votes
1answer
510 views

What are the little white eggs on rose leaf?

Somes weeks ago rose food /w bad things killer was sprinkled on the ground. The three roses were, just a little over a week ago, hacked back for better access to attempt to clear myrtle that had ...
1
vote
1answer
503 views

What is this disease with sticky transparent liquid and brown spots on leaves?

here is a picture of the plant, a shefflera. It has some very sticky transparent liquid on many leaves, and also brown spots. The spots themselves are kind of "dry" and mostly located at the leaves ...
0
votes
1answer
102 views

What's causing dry crispy leaves on Vaccinium Membranaceum?

I'm in the Willamette Valley in Oregon, USA, (USDA zone 8b) and I have a Vaccinium Ovatum, Vaccinium Parvifolium, and a Vaccinium Membranaceum in a section of my garden. They're shaded up until noon ...
0
votes
1answer
707 views

Basil leaves are scarred and wrinkled

My indoor basil plant has developed some scarring and has some pretty deformed leaves. Could it be due to the caterpillar that chewed up quite a few leaves a few weeks ago, or is something else the ...
5
votes
2answers
174 views

Is a virus, or something else, causing my tomato leaves to become shriveled, yellow and wrinkled?

Information: two tomato plants - one is some kind of a plum tomato, and the other is a black tomato. the plum tomato's seed was taken from a freshly cut plum tomato (which was bought at the ...
1
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0answers
51 views

What disease does my hemlocks have

I am not entirely sure they are hemlock trees. They were not doing so hot when I moved in 2015, but it's getting worse over the past few years. They are located near Albany, New York State, US. ...
0
votes
1answer
83 views

Foliage Plant identification and help with yellow spotting on leaves

Can you please help me with two (related) things? Firstly, can anyone tell me what the non-ivy plant in the picture is? I got it at a local supermarket for Christmas a couple of years back, and it ...
4
votes
1answer
808 views

Why do I have brown “jelly” and rotten smell inside my healthy looking tomatoes?

I have about 30 tomato plants of several varieties, all hybrid except for one heirloom. Every single tomato plant is having the same issue but my peppers, eggplant, green beans, and cucumbers are fine ...
3
votes
1answer
204 views

What's wrong with my plants

I've recently bought Cestrum nocturnum from local nursery and transplant it in pot with 40% sand soil, 40% organic compost and 20% coco peat. But I don't know why its leafs are falling continuously. ...
12
votes
5answers
150k views

What causes cucumber leaves to turn yellow, brown, wilt, die, and the plants to stop producing?

Every year it seems my cukes will go gang busters then suddenly the leaves turn yellow (starting with yellow spots), then turn brown, wilt and slowly die off. This all happens from the root crown and ...
10
votes
2answers
28k 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 ...
3
votes
1answer
118 views

Disease on walnut - light green convex lumps on leaves

There are convex light green lumps on the leaves of my family's black Walnut - only in one region of the tree. The reverse side of affected areas has like a fuzzy yellow crust. What is this and is it ...
4
votes
1answer
2k 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, ...
3
votes
1answer
252 views

Problems with Camellia sinensis

All my Camellia sinensis appear with the leaves like the foto shows. All the other Camellias ( japonica and sasanqua are Ok)- Please, someone knows what it is?
2
votes
1answer
274 views

How Can I remove leaf eater insect from the lemon plant

I have one lemon plant in my house. I have seen a small leaf eater insect on my plant (picture attached) How I remove this insect from my plant. Please give suggestions. Thanks in advance.
1
vote
0answers
71 views

What pest is affecting my tomato plants?

This is the fourth year I've been growing tomatoes in my garden, but this is the first time I see this pest affecting my plants. The plants have black, brown spots on yellowing leaves. On some of the ...
6
votes
3answers
9k 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 ...
3
votes
1answer
964 views

What’s wrong with my Aloe Vera plant?

I have absolutely no idea what’s wrong with my aloe. It started getting these patches of light brown spots a few weeks ago and appears to have spread. Any advice on what it is/how to treat it?
5
votes
1answer
272 views

How to treat a magnolia with white fuzz on its leaves?

I can’t find photos with similar problem in the internet. Therefore, I don’t know how to treat this. Please help me, the tree looks worse each day.
3
votes
1answer
75 views

Fig tree leaf color lighter than usual

Why does the fig tree (about 10x10x10feet in size) leaves have light green spots like this?
5
votes
1answer
793 views

Need identification on this growth on cherry & possibly plum trees and possible remedies

It's what I like to call The Alien Fungus, the plants don't seem to be happy about it, but they do give fruit - it grows in continental Croatia, Europe, typical yearly temperature range -20 to 40 ...
1
vote
1answer
56 views

Spots on Magnolia

My Kay Parris Magnolia has some odd white spots on it. I’m wondering what these could be and how to deal with them?
1
vote
0answers
29 views

treating potato plant disease with ridomil

Potatoes in our garden got attacked by a disease. Take a look: Presumably, this is late blight. The recommended practice is to spray potatoes with ridomil fungicide. I am very skeptical about using ...
2
votes
0answers
80 views

why do the leaves of my papaya tree twist and dry

I have papaya and mango saplings. But there are such problems on their leaves. Could you please help me ??I wanted to send a photo but I could not upload it.
3
votes
0answers
195 views

Can someone identify Desert Rose Leaf problem?

I bought this Desert Rose from a big box store on clearance about a month ago. The leaves had this trailing/patchy lighter discoloration on the leaves when I purchased. Thought I could re-pot it and ...
4
votes
0answers
61 views

What is this foliar/fruit disease on our pear trees?

This year both of our pear trees (especially our dwarf Bartlett) have a new foliar disease that I've never seen before. It looks a lot like edema with the bumps, but with a lot more discoloration and ...
1
vote
0answers
149 views

White spots on Ocimum tenuiflorum leaves (chlorosis?)

I'm growing Ocimum tenuiflorum (O. sanctum) from seed. Since 1 week ago, some seedlings have white spots on the leaves. I didn't see any insect or so and the spots look like a “depigmentation” of the ...
2
votes
0answers
56 views

Thin Pachysandra = Volutella Blight? How can I fix these areas?

I live in zone 6a (Ohio) and just purchased my first house April 2017. We have had problems with the Pachysandra in the landscaping around the home. It seems to be thinned out and weak in some of ...
1
vote
0answers
41 views

Help to ID tree and determine if it may be diseased

would like to identify this tree and determine whether it is diseased or not. Thanks for any feedback.

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