Pre-emergence Application - #LowSlowCovered James Southgate Field - - PowerPoint PPT Presentation

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Dec 01, 2022 46 likes •311 views

Pre-emergence Application - #LowSlowCovered James Southgate Field Technical Manager Why is Application Important 100 Tuning 90 80 Mechanical 70 60 Timing / Weather Only <1-5% difference in 50 product performance between all CP

SLIDE 1

Pre-emergence Application - #LowSlowCovered

James Southgate Field Technical Manager

SLIDE 2

Why is Application Important

10 20 30 40 50 60 70 80 90 100 Weed, Pest, Disease Control

Tuning Mechanical Timing / Weather Product Only <1-5% difference in product performance between all CP products

SLIDE 3

Pre-em: ON TARGET

REDUCING SPRAY DRIFT

SLIDE 4

No crop to catch small droplets
Lack of wind break
Small droplets travel further >100m
Bare soils releasing stored heat causing air/spray to rise

Pre-ems at high risk of drift - Bare Soil

SLIDE 5

Is this a very good application?

SLIDE 6

Pre-em: ON TARGET

#LowSlowCovered

BOOM HEIGHT WEATHER FORWARD SPEED NOZZLES

SLIDE 7

Forward Speeds & Boom heights

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FORWARD SPEED

The turbulence factor – drift increases as you drive faster Improved boom stability at optimum speed

Source - http://www.topps-life.org/uploads/8/0/0/3/8003583/drift_course_engl.pdf

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BOOM HEIGHT

Single biggest controllable factor in reducing drift

A boom height of 50cm is optimum to minimise drift and achieve best coverage of the target.

Source - http://cereals-2.ahdb.org.uk/publications/documents/events/optimising_spray_application_for_fungicides.pdf

Double the

boom height

up to 10x

the drift

SLIDE 10

Effects of forward speeds on black-grass control

Increasing forward speed increases drift through greater turbulence behind spray boom

0.6l/ha Liberator (DFF + FFC) + 4l/ha Defy (PSC)

0.00 10.00 20.00 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00

6kph 8kph 12kph 16kph % of Black-grass Control

average 2018 average 2017

SLIDE 11

Forward speed - drone scan

16 kph 12 kph 6 kph Untreated

*Note – more red indicates greater black-grass population

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10 20 30 40 50 60 70 80 90 100

50cm FF 100cm FF 100cm 90% DR 50cm 90% DR

average 2018 average 2017

Effects of boom height on black-grass control

Increasing boom height from 50 cm to 1 m increases drift by up to 10 times

Larger droplets help compensate for increased boom heights, however 50 cm is the optimum boom height both with 90% DR and flat fans

% Black-grass control

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Pre-emergence Application – Water Volumes

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Water volume and coverage

100l/ha 200l/ha 400l/ha Flat fan 90% DRT 23.1% 18.8% 36.2% 29.2% 64.4% 56.4%

SLIDE 15

2018 water volumes effect on black grass control across 3 trial sites

Untreated average Black Grass population – 100plants/m2 Defy @ 4l/ha + 0.6l/ha Liberator Syngenta trial Barton, Cambs 2014-2017

DEFY @ 4l/ha + 0.6l/ha Liberator Syngenta trials 2018 Liberator is a registered trademark of Bayer CropScience Ltd.

SLIDE 16

Stats not just trends….

LSD – 10.491% 3 years trials work – 6 trials

SLIDE 17

50l/ha 100l/ha 200l/ha 400l/ha untreated

Water Volumes Drone Scan

Note – more red indicates greater black grass population

SLIDE 18

Nozzles

James Thomas New Farming Technologies Lead

SLIDE 19

Difficult weather conditions are common at autumn pre-em timing

In a 1.5 month period there were only 5 good spray days at our Barton IC. It is inevitable therefore that pre-ems are sometimes applied poor weather conditions because timing is so important

SLIDE 20

Weather – Wind Speed

Spraying in high wind speeds with incorrect nozzles choice

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90% drift reduction nozzles deliver equivalent Black-grass control to market standards

Nozzle choice

UK Trials 2016/17 + 2017/18

% Black-grass control

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Angled 3D Nozzle –200 l/ha 90% Drift Reduction Nozzle – 200 l/ha

Pre-em = DEFY 4.0 l/ha + Liberator 0.6 l/ha. Barton Innovation Centre. Application Trials 2017 Liberator is a registered trademark of Bayer CropScience Ltd.

Untreated

SLIDE 23

Nozzle choice - drone scan

Untreated Teejet TTI110-05 @ 200 l/ha 06 3D @ 200 l/ha Teejet AI110-05 @ 200 l/ha

*Note – more red indicates greater black-grass population

SLIDE 24

NOZZLES CHOICE

The influence of nozzles on drift reduction

SLIDE 25

90% drift reduction nozzles minimise the risk of drift

Wind tunnel testing at Silsoe Spray Application Unit demonstrates how some 90% nozzles mitigate the risk of higher wind speeds.

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Double the boom height 10x the drift 50 cm for minimum drift 50 cm for even coverage Double the wind speed double the drift 1-2 m/s or 3-6kph Increase in turbulence and boom instability at faster forward speeds increase the drift Speed under 12 kph High pressure increase in drift Reduce pressure Coarse to extra coarse droplet size 200 l/ha

BOOM HEIGHT WEATHER FORWARD SPEED NOZZLES

Pre-emergence Application - #LowSlowCovered

Why is Application Important

Pre-em: ON TARGET

REDUCING SPRAY DRIFT

Pre-ems at high risk of drift - Bare Soil

Is this a very good application?

Pre-em: ON TARGET

#LowSlowCovered

Forward Speeds & Boom heights

FORWARD SPEED

The turbulence factor – drift increases as you drive faster Improved boom stability at optimum speed

BOOM HEIGHT

Single biggest controllable factor in reducing drift

Double the

up to 10x

the drift

Effects of forward speeds on black-grass control

Forward speed - drone scan

Effects of boom height on black-grass control

Pre-emergence Application – Water Volumes

Water volume and coverage

2018 water volumes effect on black grass control across 3 trial sites

Stats not just trends….

LSD – 10.491% 3 years trials work – 6 trials

Water Volumes Drone Scan

Nozzles

Difficult weather conditions are common at autumn pre-em timing

In a 1.5 month period there were only 5 good spray days at our Barton IC. It is inevitable therefore that pre-ems are sometimes applied poor weather conditions because timing is so important

Weather – Wind Speed

Spraying in high wind speeds with incorrect nozzles choice

90% drift reduction nozzles deliver equivalent Black-grass control to market standards

Nozzle choice

Angled 3D Nozzle –200 l/ha 90% Drift Reduction Nozzle – 200 l/ha

Untreated

Nozzle choice - drone scan

NOZZLES CHOICE

The influence of nozzles on drift reduction

90% drift reduction nozzles minimise the risk of drift

Application on target #LowSlowCovered

Reducing spray drift