Astrokerb nozzle choice for thick rape

Wigeon

Member
Arable Farmer
What is the collective view on a nozzles for a reasonably close canopy of rape?

Would normally go defy 3d forward and backward at 100lts, but am contemplating tti low drift at 200 lts or even 05 flat fans at 200 to get it as far down as possible. There are pros and cons of each but I'm not sure what is going to be most effective. Stuff is so expensive I don't want to waste a drop!

What are others doing?

Many thanks
 

B'o'B

Member
Arable Farmer
Location
Rutland
I would change that to say
If just kerb then as course a nozzle as you have I would suggest and a good water rate but if you've got 1000 acres to get over you might ignore my last comment
If Astrokerb I’d be looking at the 3D defy or GuardianAir Twins and go as high a water volume as you can cope with.
 

7800

Member
Location
cambridgeshire
definitely not a coarse nozzle as the large droplets travel in a straight line and will be intercepted by the osr leaves.
A fine drifty spray is needed (3D etc) to get the droplets under the leaf canopy with sideways movement of the droplets.
 
I'm afraid I don't put the same faith into the 3 d nozzles in a thick crop of rape as most of you , I found it didn't have the penetrative power as a heavier droplet , okay you don't want it so course that it runs off ,
I used a IDKT 5 nozzle because it's what I have , but it wouldn't of worried me one bit if I had a slightly courser nozzle , for the contact element of the astrokerb it's no good poncing around in the top of the canopy , if the weeds are at ground level that's were you've got to get the chemical !!!!!
 

Oat

Member
Location
Cheshire
Most of the action of propyzamide is residual, so the important thing is that it gets to the soil where it can then be taken up by weeds. Therefore exact nozzle choice is not too important, although angled nozzles and high water volume will help. Although you want the product to get to the soil, you also don't want it to get leached out and into water, so don't apply if ground is water logged etc...
 

Brisel

Member
Arable Farmer
Location
Midlands
The aminopyralid in Astrokerb has reasonable residual activity too. That's why there are lots of label restrictions about treated straw & following crops. If the propyzamide works well in a thick canopy, it follows that the aminopyralid should be ok too.
 

B'o'B

Member
Arable Farmer
Location
Rutland
The aminopyralid in Astrokerb has reasonable residual activity too. That's why there are lots of label restrictions about treated straw & following crops. If the propyzamide works well in a thick canopy, it follows that the aminopyralid should be ok too.
I thought that was because it bound so strongly to the plant residue rather than the soil as such. I could be wrong though.
 

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