Jump to content

Log in or register to remove this advert

Red/brown exudate on Lime


Tallgrass
 Share

Recommended Posts

Hi All,

 

I have found a reddish/brown exudate on a mature lime tree. It seems resemblant of pseudomonas p syringae on horse chestnut but I have not heard of it on lime before. It is really bright red, and doesn't have the strong smell typical of the horse chestnut variety.

 

It is also not typical of the bacterial wetwood exudates which look quite frothy, and can be seen on lime sometimes.

 

Is there any sort of canker that affects limes?

 

Any ideas anyone?

 

Thanks

Leonie

DSC01649.jpg.24616887b91d501a2a935645977ed5ec.jpg

DSC01651.jpg.b7d216181273061dd5bcd0873dc37069.jpg

DSC01654.jpg.ad71b11271af619dcc1667e51e439ee9.jpg

Link to comment
Share on other sites

Log in or register to remove this advert

In your last pic there is a round object at the base of the tree. A fungal conk?

 

The primary infection court there is self-inflicted; included bark in the main fork. Why not have a poke around there?

 

Very common in US. See pic in attached.

 

black droplets are coming out of ‘bleeding lesions.’ It

looks like a soil-borne organism, such as Phytophthora sp.,

is colonizing the phloem tissues under the bark. These

lesions are seldom a structural concern, because the infection is in the phloem. This pest should be

managed with IPM treatments aimed at compartmentalization.

I flipped through pages 354–367 of my book on

diseases. “‘Remove soil from stem tissue, dry the area,

deeply aerate nearby soil, clean and heat the lesions, and

amend the soil with calcium fertilizer and beneficial

microorganisms to help speed compartmentalization.’

Link to comment
Share on other sites

Could also be symptomatic of Armillaria...

 

Absolutely true. Easy enough to get more info by cleaning the wound and probing.

 

Thanks for posting good pics of the outside signs (symptoms?)

Last pic shows missing bark at base; perhaps killed by previous exudation?

What is that round object?

 

We can throw darts all year re pathogen ID.

<5 minutes with a screwdriver might inform the discussion immensely.

Link to comment
Share on other sites

Hi All,

 

I have found a reddish/brown exudate on a mature lime tree. It seems resemblant of pseudomonas p syringae on horse chestnut but I have not heard of it on lime before. It is really bright red, and doesn't have the strong smell typical of the horse chestnut variety.

 

It is also not typical of the bacterial wetwood exudates which look quite frothy, and can be seen on lime sometimes.

 

Is there any sort of canker that affects limes?

 

Any ideas anyone?

 

Thanks

Leonie

 

I think you are right with pseudomonas (phytopthora bleeding canker) I have seen it on lime before

Link to comment
Share on other sites

In your last pic there is a round object at the base of the tree. A fungal conk?

 

The primary infection court there is self-inflicted; included bark in the main fork. Why not have a poke around there?

 

Very common in US. See pic in attached.

 

black droplets are coming out of ‘bleeding lesions.’ It

looks like a soil-borne organism, such as Phytophthora sp.,

is colonizing the phloem tissues under the bark. These

lesions are seldom a structural concern, because the infection is in the phloem. This pest should be

managed with IPM treatments aimed at compartmentalization.

I flipped through pages 354–367 of my book on

diseases. “‘Remove soil from stem tissue, dry the area,

deeply aerate nearby soil, clean and heat the lesions, and

amend the soil with calcium fertilizer and beneficial

microorganisms to help speed compartmentalization.’

There is no fungal conk - it's a bark growth at the base.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  •  

  • Featured Adverts

About

Arbtalk.co.uk is a hub for the arboriculture industry in the UK.  
If you're just starting out and you need business, equipment, tech or training support you're in the right place.  If you've done it, made it, got a van load of oily t-shirts and have decided to give something back by sharing your knowledge or wisdom,  then you're welcome too.
If you would like to contribute to making this industry more effective and safe then welcome.
Just like a living tree, it'll always be a work in progress.
Please have a look around, sign up, share and contribute the best you have.

See you inside.

The Arbtalk Team

Follow us

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.