What pre em nozzles are favoured now?

[Jack Russell]

What would be the current favoured nozzles for pre em this autumn? We would be running at 10-12kph with 140-160lt water.

 

[ajd132]

Lots of people are now saying an air induction. Basically just get as much on the floor as you can and that it’s more to do with conditions to then actually make them work. Thinking of just going with gaurdian air at 3 bar 150l.

Blog | Silsoe Spray Ap Unit

www.ssau.co.uk

 

[czechmate]

Lots of people are now saying an air induction. Basically just get as much on the floor as you can and that it’s more to do with conditions to then actually make them work. Thinking of just going with gaurdian air at 3 bar 150l.

Blog | Silsoe Spray Ap Unit

www.ssau.co.uk

Received a delivery of Defy/Défi last week, came complete with a note reminding that air induction (I assume as something may have got lost in the translation ) nozzles are obligatory with defi. In France.

 

[Matt77]

I’ve left it in the tractor and only half way through it but the nroso booklet that turned up yesterday seems to be pointing away from defy 3d’s now, couldn’t beat them a few years ago I’m sticking with hypro ULD’s in a twin cap, 200L/ha 11kph.

 

[traineefarmer]

The mixed messages coming through on this subject are starting to baffle me, along with having to sift through advertorials, research funded by nozzle manufacturers and figure a clear answer.

I've just bought some guardian air 025 which I'm planning to use for everything except pre-ems on bare soil, where I will go back to some LD03 flat fans at 180 L/ha at about 9-10 km/h. There's no science to those figures, just 1800L in a 2000L tank saves spills and does 10 Ha, and the speed is what my sprayer does comfortably in low range on floats.

We'd been doing the same same job for several years at 140L/ha without an issue, this is about as close as I can get to the magic 200 without buying yet another set of nozzles for one application on our relatively small area or going at a snail pace with odd sized loads.

 

[benny6910]

I’ve had good results with my guardian air 035 at 150l but I try and keep my speed to 10kph max

 

[B'o'B]

I’ve got several options from 12k at 100L/Ha using 025 GuardianAir or 120l/Ha with GuardianAir Twins to 200l/Ha with the TeeJet nozzles Syngenta have an offer on if it’s getting a bit marginal.
From my understanding of what I’ve heard one of the big reasons Syngenta are pushing the 200l 90%drift reduction nozzles is because Defy is pretty mobile and they are trying to keep it from being withdrawn. There is very little none Syngenta based evidence that it’s really worth going much over 100L/Ha for pre-em. But there definitely does seem to be a fair amount of evidence to show that it is well worth keeping forward speed below 12km/h.

 

[Brisel]

Received a delivery of Defy/Défi last week, came complete with a note reminding that air induction (I assume as something may have got lost in the translation ) nozzles are obligatory with defi. In France.

Syngenta were advocating fine spray quality angled nozzles for years. They even got Hypro to make them one for Defy here! Now, they want to keep the herbicides out of water so are recommending coarse nozzles, compensating for larger droplets with higher water volumes.

 

[Brisel]

Read the blog from the professionals who ought to know at the Silsoe Spray Application Unit https://www.ssau.co.uk/blog

 

[traineefarmer]

I’ve got several options from 12k at 100L/Ha using 025 GuardianAir or 120l/Ha with GuardianAir Twins to 200l/Ha with the TeeJet nozzles Syngenta have an offer on if it’s getting a bit marginal.
From my understanding of what I’ve heard one of the big reasons Syngenta are pushing the 200l 90%drift reduction nozzles is because Defy is pretty mobile and they are trying to keep it from being withdrawn. There is very little none Syngenta based evidence that it’s really worth going much over 100L/Ha for pre-em. But there definitely does seem to be a fair amount of evidence to show that it is well worth keeping forward speed below 12km/h.

That makes a lot of sense. But it's very frustrating when we are trying to make decisions regarding our crop and the environment and yet vested interests and loud money are distorting the advise we are expected to follow.

 

[traineefarmer]

Read the blog from the professionals who ought to know at the Silsoe Spray Application Unit https://www.ssau.co.uk/blog

An interesting and well written piece, but in summary is the answer really "We don't know"?

 

[Buggerallbandwidth]

Bfs Air Bubble Jets my nozzle of choice. The original and still one of the best. 150 to 200 l/ha, boom 50cm, 12 kph. We have to keep chems on target or we will lose more. I never use flat fans - too risky. And corroborated by the Silsoe blog.

 

[B'o'B]

An interesting and well written piece, but in summary is the answer really "We don't know"?

I’m not sure that’s how I read it.
my take is:
1) make sure you get a pre-em applied.
2) keep speed below 12km/h
3) AI nozzles increases the amount of Active Ingredient hitting the soil so best to use them.
4) Don’t increase water volumes if it it will compromise timings.

 

[Brisel]

I'm sticking with alternating angled Bubblejet air induction nozzles run at higher pressures (with the option to slow down and lower the pressure). As above, 100 l/ha is fine with good coverage. Mine will be 120+ l/ha to give a finer spray at 12 kph without needing any more tank loads per block of wheat.

 

[traineefarmer]

I’m not sure that’s how I read it.
my take is:
1) make sure you get a pre-em applied.
2) keep speed below 12km/h
3) AI nozzles increases the amount of Active Ingredient hitting the soil so best to use them.
4) Don’t increase water volumes if it it will compromise timings.

I was only referring to the "Why is there so much conflicting information" blog.

 

[fudge]

I was only referring to the "Why is there so much conflicting information" blog.

I thought the gist of that blog was, that contrary to certain trade claims, it is impossible to differentiate between nozzles in application trials. Therefore all of the nozzle configurations one reads about are as good as one another!! N.B ff @ 100l/ha is the cheapest and simplest of those.

 

[ajd132]

I thought the gist of that blog was, that contrary to certain trade claims, it is impossible to differentiate between nozzles in application trials. Therefore all of the nozzle configurations one reads about are as good as one another!! N.B ff @ 100l/ha is the cheapest and simplest of those.

Read the other posts. Air induction, flat fans lose too much. It basically says get as much on the floor as you can which an air induction will always be better at than a flat fan. Water rates and foward back facing nozzles all pointless.

 

[fudge]

Read the other posts. Air induction, flat fans lose too much. It basically says get as much on the floor as you can which an air induction will always be better at than a flat fan. Water rates and foward back facing nozzles all pointless.

But one cannot find that difference in an application trial?

 

[principal skinner]

Boom height, forward speed and weather conditions far more important than nozzles

 

[SilliamWhale]

Boom height, forward speed and weather conditions far more important than nozzles

cant sell that