regular use of kerb and crawler

[yellow belly]

https://www.sciencedirect.com/science/article/pii/S0038071700002194

repeated use of kerb and crawler conditions the soil to break it down quicker

is this a possible reason wheat rape rotation leads to more black grass

looking in to crawler use on winter linseed and came across this

 

[Worsall]

Interesting article and a another good reinforcement that repeated application of any product is probably not a good idea.
Can we 'spin' it as "applications of pesticide aid Carbon capture", and claim some Carbon credits

 

[An Gof]

How regular is regular?
I’m still on a 1 in 4 WOSR rotation and therefore using Kerb every 4 years. Specifically as part of an integrated Brome strategy across the whole rotation.

 

[Brisel]

There was a theory that repeated IPU use had a similar soil microbe behaviour. I was getting poor annual meadow grass control on a block of silt in rotational roots & veg so had a couple of years off it. In the last year before it got banned the first time I used it again and had much better results.

 

[roscoe erf]

got arrested for that

 

[Fendt516profi]

Came to have a look how kerb crawling related to cropping

 

[yellow belly]

There was a theory that repeated IPU use had a similar soil microbe behaviour. I was getting poor annual meadow grass control on a block of silt in rotational roots & veg so had a couple of years off it. In the last year before it got banned the first time I used it again and had much better results.

i remember something about that in the 1990s

the crawler study was done on use every year but also a reduction for 2nd use

i was considering wheat followed by winter linseed but now will look at longer gaps between crops

i believe that the kerb has not worked as well in the last 20 years
i have often found bg in the bottom of rape stubbles especially where the rape is thin
in the 1980s we never had any grass weeds get past kerb
in the 1990s we grew wheat rape wheat rape but always ploughed after rape

 

[Brisel]

Hmm. Back then we also used higher seed rates for osr so there would have been more crop competition. Before flea beetle there was a trend towards lower seed rates with expensive hybrids which IMO caused bigger black grass plants that were harder to control with Kerb. We also used high rates of metazachlor which softened it up for the Kerb. And fops/dims still worked.

 

[fudge]

Personally I don’t rate crawler as a black grass herbicide. On the odd occasion I have used it in OSR as an add on to kerb it didn’t seem to add anything to the control , iirc it is quite expensive.

 

[Bogweevil]

Remember that for soil insecticides, Yaltox in particular, ''enhanced degradation', it was called, was unaware it was a herbicide issue.

Come to think about it is this speedy degradation the reason we wait for cold weather before slapping on some Kerb? Microbes don't function at lower temperatures so degradation is delayed?

 

[Gong Farmer]

Come to think about it is this speedy degradation the reason we wait for cold weather before slapping on some Kerb? Microbes don't function at lower temperatures so degradation is delayed?

Yes.

 

[T Hectares]

I was wondering if soils got cold enough for Carbetemide or Kerb in Aus !!

 

[DanniAgro]

Twenty years ago the max rate for Kerb was 2.1 litres, whicu I used on a couple of occasions on bad BG spots. The BG control was total.

 

[pebble]

2.1l/ha would be 400g/l version. Full rate is 1.7l/ha Kerb 500 so actually 10g more active. Less control could be mild winters? apart from 2010.

 

[They see me rolling]

I've had a few calls this week about using Kerb/Astrokerb on winter linseed. Just in case anyone has any doubt, do not use these on linseed, you will kill the linseed. Do not use Fox either.

Crawler can be used, but the weather must be cold to ensure linseed doesn't take up the herbicide. Applications must be done by Christmas, as Crawler stops linseed growing 6 weeks. If you put it on in Jan/Feb there is a high risk of crop damage and you will stop linseed growth into March when it should be growing. Linseed must be at least 7cm tall to take Crawler.

 

[DanniAgro]

2.1l/ha would be 400g/l version. Full rate is 1.7l/ha Kerb 500 so actually 10g more active. Less control could be mild winters? apart from 2010.

Are there two different strengths? I can't remember any difference in the Kerb I've bought over the years.

 

[Gong Farmer]

Are there two different strengths? I can't remember any difference in the Kerb I've bought over the years.

Most liquids are 400g/l, most powders are 500g/kg but a couple of products are 800g/kg

 

[deleted user 837354]

I honestly do not believe the winters we have been having for the last 10 years at least have helped residual or soil acting herbicides much at all. Too mild and much too wet.

 

[yellow belly]

I honestly do not believe the winters we have been having for the last 10 years at least have helped residual or soil acting herbicides much at all. Too mild and much too wet.

I would agree for some kerb crawler the later ones
although Avadex and flufenecet work pretty well here aplied in September

not noticed any reduction in Avadex control of wild oats