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Posted
4 minutes ago, kevinjohnsonmbe said:

Blah, blah.....

 

Different name, same routine!

 

Standing joke hereabouts: 

 

Whats yellow and sleeps 5?

 

A Cormac van ?

Who's to blame, the lads in the vans or the people who are paid to organise TM, tankers, disposal sites that are taking imports but fail compliance?

 

 

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Posted

argument against single species avenues:

methode_times_prod_web_bin_4bad94f2-3ea6-11e9-889c-a7e27b96460c.jpg.2d738760b44b81b87dab62485bc79adf.jpg

'An invasive beetle from Asia that has infested trees lining the streets of Johannesburg’s most exclusive suburbs is sweeping across South Africa, and scientists are powerless to stop it.

The only defence is to cut down and burn infected trees in the city, one of the largest urban forests in the world.

It is estimated that half a million of Johannesburg’s ten million trees will be invaded by the polyphagous shot hole borer, which is also wreaking havoc in eight of the country’s nine provinces. It could soon cross borders to blight forests elsewhere in Africa.' Times Uk

Posted
3 hours ago, tree-fancier123 said:

argument against single species avenues:

methode_times_prod_web_bin_4bad94f2-3ea6-11e9-889c-a7e27b96460c.jpg.2d738760b44b81b87dab62485bc79adf.jpg

'An invasive beetle from Asia that has infested trees lining the streets of Johannesburg’s most exclusive suburbs is sweeping across South Africa, and scientists are powerless to stop it.

The only defence is to cut down and burn infected trees in the city, one of the largest urban forests in the world.

It is estimated that half a million of Johannesburg’s ten million trees will be invaded by the polyphagous shot hole borer, which is also wreaking havoc in eight of the country’s nine provinces. It could soon cross borders to blight forests elsewhere in Africa.' Times Uk

Aye, they look nice but they're a risky proposal.

Posted
4 hours ago, kevinjohnsonmbe said:

Bit of background here:

 

http://www.jhbcityparks.com/index.php/street-trees-contents-29

 

If only we knew then what we think we know now.

when the same (or similar) bug/fungi complex took out some English oaks a few years ago in California, looks like DEFRA were concerned enough to go into it in some detail establishing known host plants and possible methods of entry into UK- although our climate is vastly different, they seemed to think there was some risk from imported planting material

The table of confirmed reproductive hosts in the document below is huge - so how this relates to the pattern in the  Johannesburg photo I won't make any more silly guesses

https://secure.fera.defra.gov.uk/phiw/riskRegister/downloadExternalPra.cfm?id=4055

 

 

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