Pre ploughing and pre emergence spraying

Hfd Cattle

Member
Mixed Farmer
Location
Hereford
Quick question for advice .
Agronomist want to spray off stubbles before ploughing ,where there is very little weeds , and then spray again with pre -em after drilling .
I'm not sure whether this is right or not as I can't see the point in spraying twice with the expense of sprays . Also I want to get on ploughing as the drill wants to come on Monday ....any advice please ...pm if want to
 

tullah

Member
Location
Linconshire
Quick question for advice .
Agronomist want to spray off stubbles before ploughing ,where there is very little weeds , and then spray again with pre -em after drilling .
I'm not sure whether this is right or not as I can't see the point in spraying twice with the expense of sprays . Also I want to get on ploughing as the drill wants to come on Monday ....any advice please ...pm if want to
If the plough will bury them then I wouldn’t bother.
If there’s couch on the headlands then I’d just do the headlands, might even get away with just doing the 6 m against the hedge otherwise just plough everything in. Getting drilling all done in good conditions will give best return
 

Grass And Grain

Member
Mixed Farmer
Location
Yorks
What are the weed species?

Broad leaved weeds, I wouldn't bother spraying, just plough.

Do tou have a grassweed problem? Is there much brome or blackgrass? If none, just plough. If brome or blackgrass then consider spraying. Correct glyphosate will work in 2 hrs (check with agronomist), so can then plough.

If medium loam, and you can fully invert and bury weeds, then great. If it's difficult heavy land which doesn't easily invert and totally bury grass weeds, then more reason to spray.

Definately some validity in spraying outside few metres, and also the join between headland and field where it gets ploughed twice, so brings weeds back up to the top.

Very few broad leaved weeds survive the plough and intensive cultivation. Some grass weeds will survive the plough.

Also depends on your rotation. If exclusively autumn cropping cereals, then you don't want to let grassweed populations get away from you.
 

Hfd Cattle

Member
Mixed Farmer
Location
Hereford
What are the weed species?

Broad leaved weeds, I wouldn't bother spraying, just plough.

Do tou have a grassweed problem? Is there much brome or blackgrass? If none, just plough. If brome or blackgrass then consider spraying. Correct glyphosate will work in 2 hrs (check with agronomist), so can then plough.

If medium loam, and you can fully invert and bury weeds, then great. If it's difficult heavy land which doesn't easily invert and totally bury grass weeds, then more reason to spray.

Definately some validity in spraying outside few metres, and also the join between headland and field where it gets ploughed twice, so brings weeds back up to the top.

Very few broad leaved weeds survive the plough and intensive cultivation. Some grass weeds will survive the plough.

Also depends on your rotation. If exclusively autumn cropping cereals, then you don't want to let grassweed populations get away from you.
There is very little of anything there but for a bit of broad leaf weeds . No grass etc .
 

Boysground

Member
Mixed Farmer
Location
Wiltshire
Walked some osr stubble yesterday. Glyphosate then cultivated about a month ago. Hardly anything green growing on it. Definitely no need for more chemical

Bg
 

Grass And Grain

Member
Mixed Farmer
Location
Yorks
There is very little of anything there but for a bit of broad leaf weeds . No grass etc .
Save your cash, and ask your agronomist for the reasons for the recommendation, particularly as you use the plough. Maybe there is a genuine reason?

Say to him/her, "surely the plough will kill it". On face of it, sound like agronomist is selling you something you don't need. Obvs I haven't got all the facts, but of that's the case, and a good reason for spraying can't be given, then I'd think about if you wish to keep that agronomist.

Maybe there are genuine good. reasons though. I'd question it though.
 

woodylane

Member
Location
Lancashire
Given the current glyphosate situation I’ve been very careful with glyphosate recommendations. If there’s no weed in the stubble I’d save your money and just plough it. If you have anything sticking out after drilling then stick a bit of round up in with the pre em.
 

Hfd Cattle

Member
Mixed Farmer
Location
Hereford
I'm pressing on with the plough ...
This before plough
20211008_143440.jpg

This after
20211008_143454.jpg

Don't look too bad to me.
 

DanniAgro

Member
It depends on the weather after the field has been drilled, and I don't spray if there is no rain in the offing, as the clods with grass weeds etc in them dry out totally on the drilled surface, and weeds succumb. It only takes two days if sunny and warm or three if overcast.
 

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