Stubble Turnips dying off

[berisford]

Got a field of stubble turnips drilled Jul ploughed old pasture came ok ish then parts hit with flea beetle badly sprayed late Jul,but in the the last 3 weeks whole field including pieces which there was no beetle which has huge bulbs and leaves well over knee height,leaves are going yellow and dying off,has anyone any idea of what it could be,to late to do anything now so will have to be
grazed off before roots start rotting as well.

 

[Brisel]

Can you post a picture?

Have a look in the leaf petioles (the stem of the leaf) for any holes or larvae like this;

How much N has the field had?

 

[DRC]

I’ve had it in the past , where early sown turnips get a bit diseased and the leaves go yellow/ brown . Usually the bulbs are grown by then or the leaves green up again .

 

[berisford]

Photo of a Massif turnip over a week ago look worse now they only had fym ploughed in no bagged fertiliser.

 

[Agrivator]

Photo of a Massif turnip over a week ago look worse now they only had fym ploughed in no bagged fertiliser.

Boron deficiency? Have you cut a bulb in half to check?

 

[neilo]

I have one 2ac field of turnips (also Massif) that has gone off yellow the last couple of weeks too. Everything else, including the adjoining field of swedes, looks well enough. That had N to RB209 reccs, and Fibrophos on the seedbed, so nutrition shouldn’t be an issue.

I just assumed it was a fungal problem, which I can do little about and which the frost will steady up. It has been perfect conditions for fungal diseases over the last month or so here.

 

[deleted user 837354]

Boron would be fairly evident, looks like winteritis is just setting in- plain old disease and growing pains.

 

[Agrivator]

I have one 2ac field of turnips (also Massif) that has gone off yellow the last couple of weeks too. Everything else, including the adjoining field of swedes, looks well enough. That had N to RB209 reccs, and Fibrophos on the seedbed, so nutrition shouldn’t be an issue.

I just assumed it was a fungal problem, which I can do little about and which the frost will steady up. It has been perfect conditions for fungal diseases over the last month or so here.

Are they still bulking up?

 

[neilo]

Are they still bulking up?

I doubt it. The leaves going off yellow will stop them feeding the root.

A frost will more or less kill off the fungal disease, then they may green up a bit after, if it comes warm.

 

[Greythundercloudys]

Maybe to much rain