Help mold on my onion sets

Brill thanks for all your help I will get them outside as much as I can

 

I still think it's white rot but erring on the side off caution, would still burn them, not good to contaminate any garden refuse being recycled by binning them?

 

@Notty1975
I think it's too early to be onion white rot, but read this before deciding what to do. Onion white rot/RHS Gardening

 

I was up till the early hours reading up on the net everything I could find about onion white rot and with everything I’ve found out about it
It’s to early for it
The compost I used was sterile
It’s white fuzzy mold (mine is definitely green)
The mold is generally sub surface (mines above)
Everything I’ve found has already been stated here
Mold from damp soil with little to no air flow
What I did find was to use a dusting of Sulfur powder apparently it kills and helps prevent more and also can add to the flavour (bit more of a bite) and apparently once outside as long as the onion is growing they will recover well
I really do appreciate everything everyone has commented it helped me no end

 

Do let us know how they go on

 

I will thanks again

 

As Nigel said, a bit early for OWR, normally appears at 18oC or more BUT isolate to be on the safe side? The rot looked white in the pic (to me), however, I didn't read your whole post saying the mould was green, any fungal infected plants should be treated cautiously as not to infect any others.

 

I let them grow as much as I can in the 3” pots and see how they go after dusting with Sulfur if/when I do plant them out do I plant the set with the soil from the pot or do i loosen the soil around it on plant it as a bare root ? (Can see if any more damage)

 

I'd just plant straight from the pot, I really think this is not a problem, and will disappear once the sets are planted outside.
If you plant direct next year, which I think is probably how most people do it, you wont have this.

Growing from seed is my way of doing it, and then best started in a greenhouse in pots, but if growing from sets I think you might run the risk of bolting later in the season, if they show any signs of a check once planted out.

 

Thought I’d post an update after following the advice I got them out as much as possible and brushed with sulphur powder and only bottom watered with a bit of seaweed feed and no sign of anything now and think they doing quite well thanks everyone for all your help

 

Looking good

Got all of mine in the ground today, soil felt warm

 

Was going to put mine in after putting my spuds in but only managed one bed of spuds then the sky opened so went back in the greenhouse and potted up my tomatoes will get the onions in ASAP

 

They look to be growing really strongly, not sure why you are molly-codling them though. I planted sets out a few weeks ago before the cold spell with some shallots and they are peeping through now (sturon and setton varieties). Some autumn planted ones are well away now with the warm spell we have just had.