[m1ckz]

again onions rotted  no where else on the plot to try  sooo im gona put some jeyes fluid on an overwinter it an try there again in spring    a last resort

[mumofstig]

Please note that using Jeyes on soil is illegal, aside from it killing all the good stuff like worms and bugs.

The forum cannot recommend its use for this purpose.

[fatbelly]

What do Farmers & professional growers do if they have WR?

[New shoot]

What do Farmers & professional growers do if they have WR?

Not sure, but Jeyes Fluid is extremely toxic to many types of plant and animal life and is banned for use as a soil steriliser, so it won't be that.

If they use any kind of professional only use fungicide, it is not really relevant to home growers.  They also have scope to switch to an alternative crop and leave an infected field free of allium crops for years if need be. 

[Aunt Sally]

Try treating next year's (or rather the year after next) onion patch with crushed garlic watered on.  I do and it's reasonably effective. 

It's not allowed by the EU as it's not had billions of pounds invested into testing it, but Hey Ho

SCLEROTIA GERMINATION STIMULANTS

Sclerotia  germination  stimulants  are  extremely  effective  in  reducing  the  numbers  (and  initial  inoculum) of  sclerotia  in  the  soil.    They  can  reduce  numbers  of  sclerotia  in  the  soil  by  over  90%.    The  active ingredient  is  the  chemical  diallyl  disulfide  (DADS,)  which  is  the  same  chemical  that  is  naturally  exuded by  Allium  roots.    This  chemical  triggers  sclerotia  to  germinate.    When  DADS  is  applied  artificially  in the  field  in  the  absence  of  Alliums,  sclerotia  germinate  and  cannot  find  an  Allium  host.    This  causes them  to  germinate  and  die,  rather  than  lying  dormant.    DADS  is  available  as  a  commercial  product, called Alli-up.  Garlic oil/extract (which also contains DADS) is also equally effective. DADS  (in  the  form  of  either  Alli-up  or  garlic  oil)  is  applied  at  the  rate  of  1  gallon  per  acre  in  a  fallow f ield.    It  is  essential  to  shank-apply  DADS  during  cool  weather  in  moist  soil.    Otherwise,  the  sulfur compounds  will  volatilize  and  the  application  will  be  ineffective.    There  can  be  no  Alliums  planted in  the  treated  area  for  at  least  a  year  after  application.    However,  it’s  fine  to  grow  other  crops,  such as  wheat,  corn,  etc.  during  the  one  year  Allium-free  period.    After  this  period,  Allium  crops  can  be grown  again.   

[sonnycbr]

Try treating next year's (or rather the year after next) onion patch with crushed garlic watered on.  I do and it's reasonably effective. 

It's not allowed by the EU as it's not had billions of pounds invested into testing it, but Hey Ho

SCLEROTIA GERMINATION STIMULANTS

Sclerotia  germination  stimulants  are  extremely  effective  in  reducing  the  numbers  (and  initial  inoculum) of  sclerotia  in  the  soil.    They  can  reduce  numbers  of  sclerotia  in  the  soil  by  over  90%.    The  active ingredient  is  the  chemical  diallyl  disulfide  (DADS,)  which  is  the  same  chemical  that  is  naturally  exuded by  Allium  roots.    This  chemical  triggers  sclerotia  to  germinate.    When  DADS  is  applied  artificially  in the  field  in  the  absence  of  Alliums,  sclerotia  germinate  and  cannot  find  an  Allium  host.    This  causes them  to  germinate  and  die,  rather  than  lying  dormant.    DADS  is  available  as  a  commercial  product, called Alli-up.  Garlic oil/extract (which also contains DADS) is also equally effective. DADS  (in  the  form  of  either  Alli-up  or  garlic  oil)  is  applied  at  the  rate  of  1  gallon  per  acre  in  a  fallow f ield.    It  is  essential  to  shank-apply  DADS  during  cool  weather  in  moist  soil.    Otherwise,  the  sulfur compounds  will  volatilize  and  the  application  will  be  ineffective.    There  can  be  no  Alliums  planted in  the  treated  area  for  at  least  a  year  after  application.    However,  it’s  fine  to  grow  other  crops,  such as  wheat,  corn,  etc.  during  the  one  year  Allium-free  period.    After  this  period,  Allium  crops  can  be grown  again.   

Thanks for that, I've just lost all my garlic again to white rot and I'd made my mind up to never try again. I'll give the crushed garlic a go. When would be the best time to apply the solution, the bed is empty now.

[mumofstig]

There are more instructions for the method here, hope it helps.
http://chat.allotment-garden.org/index.php?topic=79223.msg891034#msg891034

[Aidy]

Try treating next year's (or rather the year after next) onion patch with crushed garlic watered on.  I do and it's reasonably effective. 

It's not allowed by the EU as it's not had billions of pounds invested into testing it, but Hey Ho

SCLEROTIA GERMINATION STIMULANTS

Sclerotia  germination  stimulants  are  extremely  effective  in  reducing  the  numbers  (and  initial  inoculum) of  sclerotia  in  the  soil.    They  can  reduce  numbers  of  sclerotia  in  the  soil  by  over  90%.    The  active ingredient  is  the  chemical  diallyl  disulfide  (DADS,)  which  is  the  same  chemical  that  is  naturally  exuded by  Allium  roots.    This  chemical  triggers  sclerotia  to  germinate.    When  DADS  is  applied  artificially  in the  field  in  the  absence  of  Alliums,  sclerotia  germinate  and  cannot  find  an  Allium  host.    This  causes them  to  germinate  and  die,  rather  than  lying  dormant.    DADS  is  available  as  a  commercial  product, called Alli-up.  Garlic oil/extract (which also contains DADS) is also equally effective. DADS  (in  the  form  of  either  Alli-up  or  garlic  oil)  is  applied  at  the  rate  of  1  gallon  per  acre  in  a  fallow f ield.    It  is  essential  to  shank-apply  DADS  during  cool  weather  in  moist  soil.    Otherwise,  the  sulfur compounds  will  volatilize  and  the  application  will  be  ineffective.    There  can  be  no  Alliums  planted in  the  treated  area  for  at  least  a  year  after  application.    However,  it’s  fine  to  grow  other  crops,  such as  wheat,  corn,  etc.  during  the  one  year  Allium-free  period.    After  this  period,  Allium  crops  can  be grown  again.   

My suggestion is the same Auntys, crushed garlic watered in the bed the the year before planting.

[moose]

Beechgrove Garden last week talked to a farmer who sprayed garlic granules over his carrots to deter carrot fly. Did it every 2 weeks. He did not say whether it was approved.

[New shoot]

Beechgrove Garden last week talked to a farmer who sprayed garlic granules over his carrots to deter carrot fly. Did it every 2 weeks. He did not say whether it was approved.

Well if anyone asks, you are spraying it as a plant tonic or watering it in as a soil tonic 

[grinling]

There is not a cure even for farmers.
They will use garlic water for up to 4 years before planting, temp of soil needs to be a min 8. It tricks the spores into production and so die.
Yours have probably been infected bulbs. I had it with garlic which comes from Parkers, so locally grown. I also had some on the shallots.
It is transported via shoes. If it is all over the plot, try leaving garlic/onions/chives for a couple of years using garlic water and buy certified stock only.