Longevity of autumn residuals

[Flat 10]

Any idea if Belkar and Astrokerb applied 26-12-23 will preclude drilling of spring barley? We’d probably plough it down and it’s had lots of rain. My agronomist says it’s not worth risking it. But it’s now a failed crop of OSR due to cabbage stem weevil and looks a hell of a mess.
I’ve plenty of home saved spring barley. The biggest risk is if it doesn’t grow after ploughing then the sand will blow. If it’s direct drilled won’t dilute the residuals? Some of it is absolutely covered in fuzzy cheek plant (blue flowering plant with leaves that look furry but stick spines in your hand) and of course cranesbill which buckled a bit under the spray but has come back stronger.

I'd chance it if ploughing myself, but i imagine the label says different. Can't think it will be a problem but i'm no agronomist.

 

[DrWazzock]

I'd chance it if ploughing myself, but i imagine the label says different. Can't think it will be a problem but i'm no agronomist.

The label for the Belkar indicates it’s doable. Not clear on the Astrokerb. But I thought the grass weed active component broke down quite quickly with higher temperatures.
I certainly wouldn’t be risking a broadleaved crop, but a cereal? I reckon it’s worth a punt.

 

[Brisel]

Astrokerb label says:

 

[AlphaBravoPapaSux]

This may be of interest