Stagonospora curtisii

[Michael J Campbell]

I have a systemic fungicide(PLANT DISEASE CONTROL) that contains 50g/l of Carbendazim made by DOFF PORTLAND LTD, Ariel Way,Watnall Road,Hucknall,Nottingham,NG15 6DW. They still have a webpage  http://www.doff.co.uk/   and a fungicide listed but I cannot read what it contains.It may have gone of the market as I have it for a long time.   

[Gerry Webster]

Michael - I think Carbendazim is now banned in the EU. The current DOFF systemic fungicide is said to contain myclobutanil but no data sheet is available so it is unclear whether it would be effective against Stag. I suppose one could email them & ask.

Edit - I have just done so & will report what they say.

[johnw]

Does the infection affect the roots? I'm asking this because it is relatively easy to dispose of a clump with the soil around the bulbs when they are grown in a plunged basket, but fragments of roots may remain.

A good point Anne.  Usually I have discovered the redness on the bulbs when dormant so it's hard to say if the roots  - long since dried up - were affected as well. I guess that risk would further strengthen the idea that ground where they were should not be replanted for 5 or 6 years.

johnw

[Gerry Webster]

Michael - I think Carbendazim is now banned in the EU. The current DOFF systemic fungicide is said to contain myclobutanil but no data sheet is available so it is unclear whether it would be effective against Stag. I suppose one could email them & ask.

Edit - I have just done so & will report what they say.

This is the email I sent to DOFF:

I'm trying to find a fungicide which will be effective against Stagonospora on narcissus. I used to use Carbendazim which seems no longer available. Will your current systemic product (myclobutanil) be of any use?

Many thanks.

Here is the reply:
Thank you for your recent enquiry.
(Stagonospora curtsii)  Yellow to brown lesions at leaf tips. Elongate reddish brown leaf spots. Small black pycnidia form in necrotic areas.
The fungus survives in the neck and between scales.
Disease is favored by mild, moist conditions. Spores are spread in splashing water.
The fungus infects members of the Amaryllidaceae. Treat bulbs with hot water. Protect plants in the field with fungicides. Make first application as leaves emerge.
Doff Systemic Fungus Control contains myclobutanil (controls black spot, rust and mildew). We have tested our products on a limited number of species, we would advise for you to contact your local garden centre for further advice on which fungicide to use.
 
Regards
 
Sharon Milner
Technical Department
Doff Portland Limited

Very helpful!

[annew]

 

[Maggi Young]

What a feeble reply from the manufacturer. 

[David Nicholson]

a joke!

[Michael J Campbell]

Typical    And the garden centre would definitely know,wouldn't they.

[annew]

I'd be amazed if they'd heard of the disease, let alone know the treatment. Might be entertaining to ask though!

[Gerry Webster]

What a feeble reply from the manufacturer. 

I wonder whether these people actually manufacture the stuff or just buy in bulk from elsewhere & repackage under their name?

[Maggi Young]

Feeble response either way, in my opinion. They should be able to answer questions like that whether they're making it or distributing it.

Wonder what the response would have been about the toxic effects.... how much would they know if a  poisoning had happpened with the wretched stuff? I thought that manufacturer and distributor would be required to know as much as was possible about products.

[Gerry Webster]

I agree Maggi.

[Chad]

I suspect the DOFF reply is all they are allowed to give.  They will have a licence for specific indications and would not be allowed to recommend use outside of those.  It looks like the licensed indications are black spot, rust and mildew.

Chad.

[Chad]

In snowdrops does Stagonospora look like the yellow leaf in the middle of the prize winning clump of 'Robin Hood' shown in KentGardener's picture on the snowdrop forum's 'RHS Halls feb 2010' thread?

Chad.

[Maggi Young]

Hi Chad, welcome to the Forum.
We were speaking about that dodgy leaf in the coach on the way home for the Dunblane Early Bulb  day.........it certainly looked very suspicious, doesn't it? I'd have removed that before exhibition if it were mine.