Bleeding Kanker

[Will Hinchliffe]

Arborists spread bleeding canker by not sterilising their tools:thumbdown:

[skyhuck]

Arborists spread bleeding canker by not sterilising their tools:thumbdown:

 

Bollocks! ,IMO.

[David oakman]

Ihave started looking at my veteran horse chestnuts and 4 so far have bad bleeding cankers oozing the light brown and the dark brown fluid not a good start i hope it gets better as i go round.

[NickJC]

leaf minor very viralent in the south west. In fact, I've on;ly seen a few that haven't been infected. Same goes for bleeing canker - not many trees without it, here.

[ScottF]

Had to deal with this issue in a fair bit of depth during a public inquiry a couple of years ago. The Alice Holt research at the time noted that the disease is vascular in nature (rather than involving root decay) and more than 50% of the trees monitored recovered. I would imagine most would have been disfigured in some way, though, with some dropping much crown. I've been through my reports and I've looked at over 300 of them, but very few have died directly from the disease. I say directly because I reckon the stress caused can allow ingress of other things, which has killed some of that cohort. They also used to reckon that the disease was cause by a number of Phytopthera fungi (P. citricola and P. cactorum) but there a growing body of evidence to suggest that it might be caused by a syndrome of bacterial agents. Basically, we don't know! I think it's worth thinking about whether the disfigurement (and admittedly branch drop) of the tree is enough to warrant it's removal if it recovers. It's worth keeping an open mind re mortality as we could do without a horse chestnut holocaust. Anyone out there know of any resistant chestnut varieties (or other Hippocastanaceae)? I'm not a huge fan of HCs per se, but somethimes they have a historical association that just makes them appropriate.

[MattyF]

chinese chesnut is resistant?...ive heard most of these diseases have come from asia any way where there trees have built up an immunity to them

[ScottF]

chinese chesnut is resistant?...ive heard most of these diseases have come from asia any way where there trees have built up an immunity to them

 

Yes, I've read that Pseudonmonas syringae pv. aesculi is pretty much endemic in India, but that could be a function of lots of "development" foresters working out there spotting it. I've been trying to find some refs on % mortality in India but haven't found anything yet. I've seen plenty of A. indica and vars. suffering with B canker over here, though.

 

Chinese chestnut? Is that Castanea mollisima?

[MattyF]

not too sure what was on about there! chinese chesnut???should of learnt by now not too post after visiting the pub! what i meant was himalayan horse chesnut( A.indica) but i guess if you have seen them suffering that strikes them off ...ive been led to believe though they are resistant though?

[Dean Lofthouse]

not too sure what was on about there! chinese chesnut???should of learnt by now not too post after visiting the pub!

 

Not too sure a get together near a pub is a good idea now Matty ??

[MattyF]

ahh it will be fine...