Problems with rhizophera...

[big fell!]

I am having quite a few problems with rhizophera in my potted fraser nurserys this year. I spray with a fungicide called Delsene 50 flow on a regular basis but it dos'nt seem to be doing much anymore. Has it built up a tolerance to this particular fungicide? is that possible? I reckon Hama is the man for this... Thoughts anyone?

[JC]

Hi Rik,

 

Im no Hama, my fungal knowledge is mediocre at best.

 

But from what you are saying it does look like the fungi has built up a resistance against the Delsene 50 flow which you have been spraying on a regular basis.

 

Have you thought about alternating treatments with another fungicides, which may help to prevent resistance being built up?

[Tony Croft aka hamadryad]

I am having quite a few problems with rhizophera in my potted fraser nurserys this year. I spray with a fungicide called Delsene 50 flow on a regular basis but it dos'nt seem to be doing much anymore. Has it built up a tolerance to this particular fungicide? is that possible? I reckon Hama is the man for this... Thoughts anyone?

 

I appreciate the sentiment, as for your problem I am unfamiliar with rhizophera and nursery production issues, but I would suggest trying a organic production method trialled alongside your affected stock. You may well find that if you consider the rhizosphere as an organism your issue will fade, and your stock will blossom.

[big fell!]

Cheers Hama, as ever an interesting theory. I dont think it would be possible to produce potted frasers on a organic basis... I will certainly look into it though. I will have some beautiful 6,7 ft scots pine this year if you still want one. Il sort it out for you if want. Cheers J, i have been onto a farm in Denmark asking how they treat it and the rhizophera shouldnt build up a resistance to Delsene. Pretty nasty stuff Delsene. I need to sterilize the nurserys after every season with a oxidizing disinfectant. Phew... Gobfull or what...

[Tony Croft aka hamadryad]

the organic method is an old skool way, lost today but i see it is on a turn, trust in nature, she knows best.

[big fell!]

Im with you there Hama but for the numbers we put out it wouldnt be viable. I leave lots of rough land round the edges of the blocks and use seaweed and naturally occurring fertilisers where possible, i know all that is negated by the fungicides/pesticides i use though. . .