Gummosis on Almond Tree (forum)

Rhys starts with ...
I've got what i'm pretty sure is gummosis on my relatively young almond tree...not sure what the initial precipitant for it was.

Any suggestions for treating it? What have you tried and how successful has it been? Is just cutting that part off enough, or should i spray the whole tree with something?

Rhys
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Time: 10th February 2011 12:33pm

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About the Author Getafix
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kert says...
Gummosis is a symptom not a diagnosis. It has many causes -water stress,insect attack and bacterial infection with Pseudomonas. The treatment may not be required and varies with the cause. Look up the diifferential diagnosis before you accept the sometimes erroneous helpful advice that gets tossed around.

Time: 10th February 2011 12:39pm

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sydney
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Rhys says...
Does anyone have any advice on how to differentiate the multiple causes.

As you say Kert, treatment may not be required, but at the same time i don't want to just assume it's from the recent hot weather/water stress and then find a dead tree in a couple of months from something i could've treated now.

Time: 14th February 2011 3:58pm

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kert says...
For what it's worth here is my experience . My trees had gummosis and I never really found out why. The trees produced very well despite this . The problem was shothole or freckle which may have caused the gummosis. The almonds were covered in fungus as I was not prepared to spray everytime it rained . There is a reason why almonds are not grown commercially near the coast. Unless you have a near desert environment or a fierce dedication to spraying it is better to grow something else ,say Macadamias.

Time: 14th February 2011 4:29pm

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Brendan says...
Looks like a perfect example of Anthracnose to me.
See post 'Mango Tree not Fruiting' for the recommended spray.

Time: 16th February 2011 9:13am

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kert says...
Looks like a perfect example of ,"if all you have is a hammer , everything looks like a nail".

Time: 16th February 2011 2:46pm

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Brad says...
@Rhys - some questions that might help.
Is the rest of the tree green, healthy and unblemished? the leaves shown look great.
how high up the trunk is that spot?
did the tree have a growth spurt before this showed?

with that kind of bark split, it doesn't look like insect attack I've seen before. but I'm sure there's lots of types of insect damage I've never seen

an anti fungal spray doesn't hurt, even if thats not the cause. You might have got some split bark that then got infected.

Time: 16th February 2011 3:27pm

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Rhys says...
Thanks everyone...yes the tree is generally healthy. It's put on a lot of new growth since i bought it last year, but it has slowed down now which i am assuming is normal. There would have been a number of weeks between the most recent growth spurt and this lesion showing up. There has been the odd caterpiller on it, and at one stage some of the leaves went brown at the tips (see photo) but this has pretty much resolved. It has dropped a few leaves recently but i put that down to the hot weather, and it currently seems to be forming the new buds for next season's growth. I haven't been able to check on the tree the last few days, but prior to that the gummosis didn't seem to be getting any worse.
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Picture: 1

Time: 22nd February 2011 9:51pm

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Joe4295 says...
Almond leaf scorch; golden death a bacteria which makes tip of leaves start to wither

If discovered early (while disease affects only one branch) disease can be removed by pruning primary scaffold 5 to 10 ft below symptoms; older infections may require the tree to be removed and replaced

Time: 15th April 2016 5:50am

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