Questions tagged [diseases]

For questions related to plant diseases.

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8 views

Help identifying cause of withering discoloration on raspberries

I am seeing the following discoloration and withering on a very small number of leaves of my raspberry primocanes I only see this on the tips of the canes, and only on the primocanes. Is this ...
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1answer
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small brown bumps on majesty palm leaves

I am home visiting my parents and they have had a majesty palm for few years. It's never really thrived as we live in Canada and are not gardening experts. Besides its yellowing, it also has small ...
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Strange leaves marks on zinnia and Mint

This morning I have noticed some strange marks on my Zinnia leaves and the leaves of the mint growing nearby: What could that be? And what could be done with it? They both grow on an east-oriented ...
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Pepino gold has white spots (not edema, not midlew) and I’m clueless

My pepino gold melon developed some tiny white spots on leaves, first it was just the leaves and looked like edema caused by overwatering (which I know can happen for peppers) so I cut back the ...
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2answers
47 views

Tomato plant stem and leaves turning dark green/black with yellow circles

I have a few tomato plants where the tops of the leaves and stems are turning dark green/grey. Additionally, yellow circles are appearing on the leaves. These were recently transplanted from indoor ...
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Mango Tree Young & Old Leaves Curling, Turning Crispy, Drooping, and Browning at the Tips

My tree is grown under a 2000W grow light a little over 3 feet away from the top of the foliage in 70F indoor weather. I figured I had a salt toxicity problem with my old clay pot full of salt all ...
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Spots on cucumber leaves

Two leaves from teh same cucumber plant, thinking these are two separate issues (lucky me). As seen in the photo, the lesions on the left are pale tan and don't really look like they're bounded too ...
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What are these yellow spots on my Melocactus concinnus?

I purchased this Melocactus concinnus online a couple of months ago. I don't remember seeing those yellow spots on the bottom half of the cactus. It's possible, however, that I just didn't pay close ...
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+100

White and black spots on indoor plants: cayenne pepper and salad seedling

many of the plants I'm growing indoor are having these white and black tiny spots on leaves. Some of my seedlings are affected by it as well. The underside has mostly small black spots. From the ...
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Squash vine stopped growing?

I've seen this on several squash plants, where the vine seems to stop growing but the growth tip is still trying to produce fruit. Not sure what this is called - internode shortening or something? ...
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Rose tip got brown burn quilted and dropped rose head

I bought this rose from David Austin last year https://www.davidaustinroses.com/us/the-poet-s-wife-shrub-rose Every since it was fine until I check it today in May 25 (I am in Pacific Northwest) It ...
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1answer
28 views

What kind of tree is this, and is the white “powder” on some leaves mean it's diseased?

I live in southern California and moved into a new house a few months ago which had this tree planted in front of the house. When we moved in, it was basically bare, but over the past couple months ...
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translucent spots in basil leaves

Every year around this time I take my basil outside. After a couple of days maybe a week, transparent spots begin appearing in otherwise perfectly good leaves. Last year I had to throw it all away and ...
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1answer
128 views

What is this raised, brown growth on my maple tree?

My tree seems to be infected with something, and every week I notice more leaves have this raised, brown growth. What is it, and how do I treat it?
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Why have my Chilli Pepper plants started to develop small slightly translucent spots/blotches on the leaves?

See the photos attached of the leaves. I planted these chilli peppers about 2 months ago (march 2020) and they have been sat on my windowsill. We've had relatively hot and sunny weather for the UK ...
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1answer
17 views

Grape Vine identify disease please

Can anyone help me to identify what is wrong with my Muscat Vine? [] []
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Ginkgo Tree in south GA

Does anyone care to tell me what is going on to my young Ginkgo tree?(The leaves) The soil is quiet sandy if that helps you. I planted it this past April. It sits a little high for drainage purposes, ...
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1answer
72 views

Do my tomatoes have aminopyralid herbicide damage?

Photo below of my tomato plant. This was planted in 3 inches of miracle grow with composted horse manure below, sourced locally. Everything was fine for about 2 weeks, then this morning I noticed that ...
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1answer
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Pyrus Calleryana 'Chanticleer' aka Ornamental Pear tree, ALL leaves are browning and curling ?disease?pest?autumn

Its autumn here in Sydney Australia. Temps are dropping to below 20C by day 9-12C night. I have 5 Pyrus Calleryana 'Chanticleer' aka Ornamental Pear tree in the front yard, 6 years old 4m tall, never ...
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26 views

Chilli leaves are dying + misformed

Some of my young chilli plants leaves are very misformed and some have dying ends. This seems to be happening at some level to all of them, any ideas what it is? I sprayed them with pesticide at some ...
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The petals of rose flowers are burned

I have a question about my rose flowers. I have two rose flowers which are planted in the garden, one of them is in the sun and another is in shadow during the day. The following problem is ocuured ...
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1answer
38 views

Disease on my shade tree?

We live in Georgia. This young shade tree is about 3 years old. Last year I noticed that by July of last year I had lost most of my leaves (they turned all the way brown and fell off). This spring I’...
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1answer
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3 Mango Trees (6 months old); Grayish-Orange Spots heavily progressed; Blackening/brown curling leaf tips; 1 Mango Plant losing all its leaves!

Mango #1 Picture Gallery Mango #2 Picture Gallery Mango #3 Picture Gallery I have had previous problems with Mango #1 and posted here a while ago, link here I have 3 mango trees I am growing ...
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1answer
30 views

Avocado leaves have various type of browning and dying young leaves

I have two avocado trees each about a year old, planted first time around spring of 2019 in a pot in UK. They really grew well until this winter when the leaf tips started browning. I use filtered ...
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Carolina Reaper and Scorpion pepper leaves yellow and spotty?

So I planted a couple of Carolina Reaper(bottom two pictures) and scorpion pepper (top picture) plants in my garden this year. I transplanted them outdoors around a month ago today. I'm not super ...
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19 views

Philodandron dying - black goo

My philodandron is slowly dying (I created a previous post here, but I lost the access to the account for some reason :/) In the other post I showed how it went from a nice big plant to losing all ...
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1answer
35 views

Why wait to lop off a bacterial canker?

There is what I think is bacterial canker on my young, multi-species fruiting plum tree. I bought it from a big box store a year ago and planted it, and I noticed this a few weeks ago. Assuming I'm ...
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1answer
28 views

What is wrong with my tomato plants? The stems are browning from root

I don't know much about gardening. Just started a little rooftop garden during quarantine. I noticed some of my tomato plants were browning from the soil. It looks like the brown parts are not getting ...
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0answers
18 views

Why does my orchid have spots on its leaves?

I have an orchid that has spots on two leaves, and no spot on the other leaves. Among these two leaves with spots, one (named "Leaf A") has more visible/pronounced/impressive spots than the other leaf ...
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3answers
44 views

Azalea japonica in trouble

What happened to my beautiful Azalea japonica? I bought it in full bloom about two weeks ago (here in Central Europe), repotted it after a few days (which was perhaps a mistake), initially placed it ...
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1answer
21 views

Fungal or bacterial infestation ? Pachypondium Lamere or Pin Palm

I have this Madagascar Pin Palm or Pachypondium Lamerei which has been attacked by some kind of fungal or bacterial infestation. I've been using an antifungal solution, yesterday was the 3rd ...
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2answers
26 views

Brown marks on tomato seedlings?

First time growing tomato plants from seed this year, but the seedlings have brown marks on the cotyledons. I've put the affected seedlings aside through fear of blight, but honestly have very little ...
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2answers
26 views

Help with columnar blue spruce

Last summer (and after checking info on posts here) I planted three columnar blue spruce trees (picea pungens fastigata). In the fall, I noticed needles losing color and later dropping, leaving ...
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2answers
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What are these pink spots on the branch of Lilly Pilly?

This is a photo of the pink spots: There is no discoloration of leaves as far as I can see. The plant itself What are they? Are they harmful? If they should be dealt with, what is the most eco-...
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1answer
36 views

What are these white fuzzy growths on the soil of my lawn?

This morning, at about 11am, I went outside and found white fuzzy patches growing on the exposed soil of my lawn in a shady spot (in north-west England). It does not appear to be on the grass itself. ...
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32 views

Monstera yellowing despite proper watering and no apparent sickness

I've had this monstera for about two years now and I've never has this problem, I'm careful not to over/under water, it's thrived until now so I suspect sunlight is not the issue either. I've ...
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1answer
38 views

Sick Gardenia - Can It Be Treated?

I have two gardenia plants that have done well in the garden for many years. I recently noticed many yellowing and browning leaves. Upon inspection, it appears that some of the gardenia buds had ...
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1answer
29 views

Why do my tomato seedlings leafs have white spots? Is it Manganese (Mn) deficiency?

I grew this seedling and five others by starting a slice of tomato in a pot. It's about 6" tall. It's been growing perhaps about a month, and I embarrassingly just found out seed starting mix doesn't ...
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1answer
13 views

How do I get rid of these spots from my curry plant?

messy curry plant with white spots]1
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What is this disease on my Christmas Palm, and how do I treat it?

I bought this Christmas Palm 10 weeks ago, and it was healthy and full, with no signs of disease. I'm in Ft. Lauderdale, zone 10. I placed the palm on my sometimes windy, south-facing balcony. I ...
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18 views

My Meyer lemon tree had so many diseases

So everything I read was to take curling or diseased leaves and branches off. I sprayed with neem oil and copper fungicide biweekly I live in zone 9 and the tree is in the ground with soil and compost ...
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2answers
23 views

Can this areca palm be saved and if so how would I do it?

Is my areca palm completely dead or can I save it somehow? All the leaves are dry and either brown or faded green, and the stems have black spots. Please refer to the photograph.
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28 views

What are these Tiny Brown Bumps on my Bay Tree Leaves?

I have a large (20+ ft tall) sweet bay laurel tree in my backyard. I recently noticed a majority of the leaves have extremely tiny, shiny brown/black bumps on them. From my research it seems like it ...
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1answer
24 views

Chilli plant leaves disease

My chilli plant leaves seem to get some white shiny spots on them and then go brown and die off. The pics don’t look like anything I’ve seen from googling; is it rescueable? Thanks! Malcolm
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0answers
11 views

Need help! What's wrong with my peppers? Brown on underside of leaves

I'm a beginner and this is my first year growing hot peppers. A few of my peppers have started to become brown under the leaves and the plants slowly begin to look sickly. I've looked for similar ...
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1answer
32 views

what's my tomatoes problem? is that a fungs? what's the solution

it take all of the plants and we use several fungicide like chlorothalonil but it didn't work.
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0answers
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Meyer lemon tree is ailing

I've had my Meyer lemon tree for more than 10 years. It's small -- maybe 2 feet tall -- but mighty: This season, it produced 30 (!) lemons that I harvested over the winter. But by February all its ...
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1answer
22 views

peace lily is dying

I have 2 peace lily and I keep them inside, water them once a week but one of them started to drop and dying, I moved it to a bigger pot and it was getting well but then drop and die again!
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1answer
31 views

What are these Mites/Aphids on Bamboo?

We live in Pune, India which has a dry climate. We see these aphids or mites on the leaves of our bamboo. The round cocoons are on the under side of the leaves. (Is cocoon the correct word?) The ...
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1answer
37 views

Getting rid of strange eggs in houseplant soil

Help! I have a peace lily which I bought three years ago for almost a nothing as it was almost dead. I nursed it back to health and was doing great, after about a year of having it in it’s nursery pot ...

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