An Introduction to SCEPTREplus Joe Martin Content SCEPTREplus - - PowerPoint PPT Presentation

An Introduction to SCEPTREplus

Joe Martin

Content

• SCEPTREplus
• Relevance to Carrot and Onion Growers
• Weed control Trials
• Knowledge Exchange
• Priorities for Year 2

• Consortium approach
• Financial contributions from Agchem / Product Manufacturers /

Producers

• In kind contributions
• Industry Steering groups with representatives from different

sectors

• Embedded Knowledge Exchange
• Flexible approach

To deliver applied research on high priority disease, pest and weed problems in fresh produce and ornamental crops in order to support approval of products and devise and develop IPM programmes

3

£1.4m AHDB

investment 4 year programme:

2017-2021

18 trials

134 products being

evaluated

• 104 conventional

products

• 11 biologicals
• 8 biopesticides
• 12 botanicals

18

Crop protection companies have contributed financially

• r in-kind

20

different test crops selected EAMU applications already submitted to CRD

• n priority crop

protection problems in year 1:

• 8 weed trials
• 6 pest trials
• 4 disease trials

Model crop trial approach with

6 different targets:

• nion thrips; aphids;

western flower thrips; downy mildew; bacterial diseases and Pythium root rot

Year 1 Targets

Relevance for Carrot and Onion Growers

Carrots Weed control in Carrots and Parsnips Aphids Onions Downy mildew (model Crop) Onion thrips on Leeks

Carrot and parsnip herbicide trials

• 4 sites
• Nottinghamshire and Suffolk
• Sandy loam soils
• Carrot and parsnip trial at each site
• 12 pre-emergence treatments in

combination with pendimethalin + clomazone (carrot) or pendimethalin + metamitron (parsnip)

• 6 post-emergence test treatments applied

after a standard pre-em

• 3 replicates
• Carrots drilled late May
• Parsnips drilled early May

Carrots on 21 June- Notts Parsnips on 27 July - Suffolk

What was done, and what happened when

• Spray timings
• Pre-emergence – within 5 days of drilling
• Post-emergence – at 1-2 true leaf, and again at 3-4 true leaves
• Assessed weed levels and crop safety
• At each post-emergence spray application
• 2, 4 and 8 weeks after the final post-em application
• Root sample
• 1m2 area per plot
• Counted, weighed and graded
• At spray application, conditions in Notts were wetter than the

Suffolk sites

• Regional differences in crop safety
• Weed levels in untreated, high in parsnip, low in carrot but

useful crop safety data from carrots

Untreated Suffolk Untreated Suffolk

Crop effects

• Pre-emergence treatments all applied with Stomp Aqua

+ (clomazone or metamitron)

• Post-emergence all applied after Stomp Aqua +

AHDB9947 (+ clomazone or metamitron)

• All post-emergence treatments checked both the

parsnip and carrot crops when assessed 2 weeks after application, but effects appear to be transient and most had recovered to acceptable based on foliar appearance at 8 weeks after application

• Some pre-emergence treatments also checked crops,

more so in Notts where rainfall was more intense around applications, again effects appeared transient

• Root data still to be analysed – Final piece!

After Gamit applied once at 0.1 L/ha post-emergence Yellow spotting after AHDB9997 pre-em Scorch after AHDB9997 post- em

Promising treatments to take forward

Carrots Parsnips Crop safe by foliar appearance (at 2 months after last post-em application) Equivalent weed control to linuron? Note: low weed numbers Crop safe by foliar appearance (at 2 months after last post-em application) Equivalent weed control to linuron? AHDB9947 pre-em No AHDB9947 pre-em Yes AHDB9999 pre-em Yes AHDB9999 pre-em Yes AHDB9998 pre-em Yes AHDB9997 pre-em Yes AHDB9997 pre-em* Yes AHDB9996 pre-em Not at both sites AHDB9996 pre-em* Yes AHDB9995 pre-em Yes AHDB9995 pre-em* Yes Aclonifen 1.5 L/ha pre-em Yes Aclonifen 1.5 L/ha pre-em* Yes Tri-allate pre-em No Tri-allate pre-em Yes AHDB9947 post-em Yes AHDB9947 post-em Yes AHDB9997 post-em Yes Clomazone 0.1 L/ha fb 0.2 L/ha Not at both sites AHDB9993 post-em Yes AHDB9993 post-em Yes Aclonifen 1.0 L/ha x 1 post-em Yes Aclonifen 0.5 L/ha x 2 post-em* Yes Aclonifen 0.5 L/ha x 2 post-em Yes

Celery Carrots Sweetcorn

Open days / Knowledge exchange

Year 2 Priorities

• Decision being made this autumn
• We welcome your input
• Contact us
• Joe.martin@ahdb.org.uk