Spray pattern - aerial view

[Sonoftheheir]

Had a field of wheat particularly hit hard with a grass spray. Anyhow my agronomist flew his drone over to have a look. There’s a very strange spray pattern? Looks like pulsing towards the end of the boom, and yes a lot of overlap on the headlands. (Yes the tramlines are too close too)

We have a Bateman 24m with agleader gps 10 sections.

Any thoughts on a remedy?

 

[melted welly]

Do the booms yaw back and forth as you travel? Would create patches of over dose/under dose at the boom ends.

 

[B'o'B]

Boom yaw. If you look the scorch is on one side of the boom, then the other. One end of the boom slows down and the other speeds up until the mounting mechanism reaches its limit and the opposite happens.

 

[Chae1]

Looks to me like gps is shutting on and off end section because your tramlines aren't 24m?

Was told its better to have end of boom on individual nozzle shut off.

 

[B'o'B]

To remedy you need to reduce slack in the boom and boom mount to an absolute minimum.
Is the sprayer gps steered?

 

[Sonoftheheir]

To remedy you need to reduce slack in the boom and boom mount to an absolute minimum.
Is the sprayer gps steered?

Not gps steered. Maybe driving too fast too? Quite a unlevel field too.

It’s got the contour boom, I’ll have a look at adjustments.

Thanks for the input everyone.

 

[Bignor Farmer]

Boom levelling dancing up and down one side then the other. More scorch where the boom end is lower. I would say it’s a ploughed field or bumpy tramlines from travelling in the wet earlier in the year?

I’d want to spend some time setting up the section control better. Doesn’t look worth having the way it is at the moment.
If it’s got auto boom levelling I’d be spending some time with that too.

 

[B'o'B]

Not gps steered. Maybe driving too fast too? Quite a unlevel field too.

It’s got the contour boom, I’ll have a look at adjustments.

Thanks for the input everyone.

I only asked as if not set up well it can make the sprayer weave left and right which can have the same effect as shown.

 

[MrNoo]

Booms ends see sawing tip to tip, seen it with a contractor I employed, he had a trailed machine, not the smoothest field and I had a pattern of wild oats similar to your scorch marks.
Whatever it is it certainly has given the wheat a good kicking

 

[z.man]

Is it just me or is it only every second width that is affected possibly meaning only one side of the sprayer is causing the problem

 

[Brisel]

Definitely yaw. It reduces as the booms settle down further up the field. Those tramlines aren't 24m wide either.

I'd spend a bit of time setting up your section control too. There's more overlap than needed at the ends. What correction signal does your Bateman have? If it's Egnos only there's a limit to how far you can cut your on/off lead times unless you're upgrading to a better signal. It also requires consistency of speed in & out of headlands - my Topcon controlled sprayer works on time not distance so rapid changes in speed near the ends varies the overlaps/misses. Does the operator travel at different speeds in different crops like spuds?

I'm not trying to be too critical - we had a new trailed sprayer 2 years ago & it took a while to set up the on/off times. Despite a good correction signal (Starfire 3) we still get overlap damage. Some liquid N scorch really shows up. There's a lot of it about even on farms with GPS.

 

[PSQ]

Another vote for yaw, the booms are clearly rocking from one end of the field to the other for some reason.
While its highlighted an issue with the sprayer the real issue is with the effect it's had on the wheat.
@Sonoftheheir , what chemical was it, high / low water rate, what was the timing, on a hot day, or co-mixed with something antagonistic?

These pictures bring back some unpleasant memories of a herbicide called 'Digital' (Flumioxazin, from Interfarm) which fried the tillers off 120 acres of wheat about 15 years ago. It cost me i.r.o. about £10k in yield, and led me to change agronomist.

 

[B'o'B]

Another vote for yaw, the booms are clearly rocking from one end of the field to the other for some reason.
While its highlighted an issue with the sprayer the real issue is with the effect it's had on the wheat.
@Sonoftheheir , what chemical was it, high / low water rate, was it applied late, on a hot day, or co-mixed with something antagonistic?

These pictures bring back some unpleasant memories of a herbicide called 'Digital' (Flumioxazin, from Interfarm) which fried the tillers off 120 acres of wheat about 15 years ago. It cost me i.r.o. about £10k in yield, and led me to change agronomist.

Flumioxazin? Still available according to the CRD website

 

[Gong Farmer]

Aptly named 'Guillotine', or was Sumicidin but that sounded too much like 'suicide' I expect.

 

[Clive]

Classic boom yaw imo

 

[e3120]

Fair play for putting the pictures up, probably happening to us all at a less acute level. Could you confirm if the field was sprayed left to right as that would confirm a post-turning effect more than a land ribble? It would also tell that the shut-off is only an issue on the outs - perhaps the rear offset is too much, but valve latency can also be tweaked.

I wouldn't completely rule out the boom rocking from side to side - stripes in the scorched bits along the line of travel would be the giveaway where nozzles were not overlapping correctly/at all.

 

[Daniel]

Had a field of wheat particularly hit hard with a grass spray. Anyhow my agronomist flew his drone over to have a look. There’s a very strange spray pattern? Looks like pulsing towards the end of the boom, and yes a lot of overlap on the headlands. (Yes the tramlines are too close too)

We have a Bateman 24m with agleader gps 10 sections.

Any thoughts on a remedy?

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What was the spray? I once had some badly stung wheat using Pacifica.

Would be worth setting your tramlines at 23.9 metres in the autumn with one of your gps steered tractors to reduce the overlap?

 

[Clive]

Section control also needs some serious setting changes - with x10 sections on a 24m you should have hardly any overlap

 

[Badshot]

You likely need new dampers on the boom.
Plus the rubber mounts, and generally set the booms up correctly.
I had a Bateman engineer do mine a couple years ago, made a huge difference to the way the boom behaved.
Wish I'd payed more attention to what he was doing.
Currently waiting for it to be done again.
Seems pretty slow getting an engineer out this time.

 

[Oat]

Another vote for yaw, the booms are clearly rocking from one end of the field to the other for some reason.
While its highlighted an issue with the sprayer the real issue is with the effect it's had on the wheat.
@Sonoftheheir , what chemical was it, high / low water rate, what was the timing, on a hot day, or co-mixed with something antagonistic?

These pictures bring back some unpleasant memories of a herbicide called 'Digital' (Flumioxazin, from Interfarm) which fried the tillers off 120 acres of wheat about 15 years ago. It cost me i.r.o. about £10k in yield, and led me to change agronomist.

I used flumioxazin a few years ago and it didn't go well I think it is quite a common active in other parts of the world, but for other crops such as soya.