DED managment

[cerneARB]

I had to fell some Ulmus glabra last week infected with DED.We retained the stems from the suckers from the elms which were live and felled the dead ones.

 

I read somewhere that the beetle that carries the fungus flies in summer at a certain height from tree to tree and if you prune the live trees to under this designated height the beetles fly over them. Is their any truth in this or can anyone suggest any other managments techniques for DED?

 

Thanks.

C

[Graham]

Not sure about the height but seems to affect trees at about 15 years so is possibly height-related.

[Xerxses]

Not sure about the height but seems to affect trees at about 15 years so is possibly height-related.

 

Stem girth.....

[skyhuck]

I think its down to cambium thickness, the beatles only burrows into the cambium of trees over a certain size.

 

I wounder if the odd tree that does not succumb has thiner cambium?

[Bundle 2]

"......anyone suggest any other managments techniques for DED?....."

 

Burn your brash.

[Marcus B-T]

Hang on, I know I studied this over 20 years ago but at the time I was told that the beetles infect the trees wit the fungus when they feed in the upper canopy as they move around to mate. I was also told they are pretty lazy things so they don't like to go too low but use wind streams to travel and also don't like hilly areas or areas that are very windy. This is why there are natural geographical boundaries. Could be rubbish since it was 20 years ago

[tommer9]

Try this site.How to Identify and Manage Dutch Elm Disease

[cerneARB]

Nice one Tommer..thanks for the link mate.