Red/brown exudate on Lime

[Tallgrass]

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

[Chris at eden]

They get Phytophthora sometimes. If you send some pics to Alice Holt they will give you some basic feedback. Or at least they used to.

[Tallgrass]

Now that's funny because I did wonder whether that was a possibility. Our woodlands team have got some testing kits so I could try testing myself.

 

Thanks

Leonie

[treeseer]

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.’

[sloth]

Could also be symptomatic of Armillaria...

 

Sent from my GT-I9100 using Arbtalk mobile app

[treeseer]

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.

[Paul Cleaver]

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

[treeman]

I'd say the first pic looks like a wet cavity and the other 2 honey fungus or phyotphra, I've seen honey fungus on birch and purple plum do the same. I think it also says about honey fungus showing these symptoms on birch in diagnoses of ill health in trees

[Tallgrass]

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.

[Tallgrass]

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

 

 

This comment confuses me - do you mean pseudomonas (bleeding canker) or phytopthera? Not quite sure what you mean.