Andy Richardson

Allium & Brassica Agronomy Ltd.

Weed control in Brassicas and Alliums

Weed control in Brassicas and Alliums

What’s the plan for the next 20 minutes?

1. BLW control options in Brassicas

2. BLW control options in Alliums

3. New developments in IPM weed control.

BLW control options in Brassicas

Active (example product) B Spr Cabb Cauli Brocc Kale Swede

Clopyralid (Dow Shield) UK/IRE UK/IRE UK/IRE UK/IRE UK IRE

Metazachlor (Butisan S) UK/IRE UK/IRE UK/IRE UK/IRE UK/IRE UK/IRE

Napropimide (Devrinol) UK/IRE UK/IRE UK/IRE UK/IRE UK/IRE IRE

Pendimethalin (Stomp) UK/IRE UK/IRE UK/IRE UK/IRE UK/IRE

Pendimethalin + DP (Wing-P) UK UK/IRE UK UK

Pyridate (Lentagran WP) UK/IRE UK/IRE UK/IRE UK/IRE UK

S-metalochlor (Dual Gold) UK/IRE UK/IRE UK/IRE UK/IRE UK/IRE UK/IRE

Clomazone (Gamit 36CS) UK UK UK UK UK UK

Metazachlor + DP (Springbok) UK UK UK UK UK UK

Propyzamide (Kerb) UK UK

Data in the above graph is a combination of label and HDC trials data, 2005 onwards

BLW control options in Brassicas

Key Weeds

Stomp Aqua Wing P Gamit 36 CS Butisan S Dual Gold Springbok Kerb Flo Devrinol

PendimethalinPendimethalin +dimethenamid

PClomazone Metazachlor

S-metolachlor

Metazachlor +dimethenamid

PPropyzamide

Napropamide@ 2.8L/ha

Bindweed black S MR MR S

Charlock S R MR R

Fat-hen S S MS MS S MS

Fumitory, common MS R R MS MS R

Groundsel MS S S S S MS

Knotgrass S S MR R MR S S

Mayweed, scented MS S R S S S S

Mayweed,scentless MS S R S S S S

Nettle, small S S MR MS S MS

Nightshade black S MS S R

Orache, common S S R

Pennycress, field S R MS R

Persicaria, pale S MS MR

Redshank S S R S R

Shepherd's-purse MS S S S MS S MS

Vol OSR MS S R R MS

What’s new in the UK over the past 12 months?

Wing-P – broccoli, cauli & sprouts

Springbok – broccoli, cauli, sprouts, cabbage &kale/collards. BASF EAMU.

Dow Shield 400 – kale/collards

BLW control options in Brassicas

What’s new in the UK over the past 12 months?

Wing-P (pendimethalin + dimethenamid-P)

Benefits – sorts out most weeds, polygonums,AMG, groundsel, mayweeds, s. purse & nettle.

Drawbacks – not great against cruciferous weeds.Increased risk of phyto if applied OTT.

BLW control options in Brassicas

2013 Bandspraying Trials – Elsoms

Untreated Butisan + Gamit Wing-P

BLW control options in Brassicas

What’s coming to the UK - hopefully?

Benfluralin – still waiting a decision from the ACPwith regard to the acceptability of reducingbuffer zones down below 20m by using low driftnozzles.

All data to support use on all leaf & flowerheadbrassicas has been generated STILL waiting forthe full approval for OSR (2015?).

BLW control options in Brassicas

BLW control options in AlliumsActive (example product) Leeks Bulb Onions Salad Onions

Aclonifen (Emerger) IRE (SETS)

Bentazone (Basagran SG) UK UK UK

Bromoxonil (Butryflow) UK

Chlorpropham (Cleancrop Amigo 2) UK UK/IRE UK

Clopyralid (Dow Shield) UK/IRE

Flumioxazin (Sumimax) UK/IRE

Fluroxypyr (Starane 2) UK UK

Ioxynil (Totril) UK/IRE UK/IRE UK/IRE

Linuron (Afalon) UK UK

Metazachlor (Butisan S) UK/IRE

Metazachlor + DP (Springbok) UK

Pendimethalin (Stomp) UK/IRE UK/IRE UK/IRE

Pendimethalin + DP (Wing-P) UK/IRE UK/IRE UK/IRE

Pyridate (Lentagran WP) UK/IRE UK/IRE UK

Prosulfacarb (Defy) UK/IRE UK/IRE UK/IRE

S-metalochlor (Dual Gold) UK/IRE

BLW control options in Alliums

BLW control options in Alliums

Butryflow – approved for use in maize,sweetcorn, linseed, bulb onion and shallot.

Bulb onion/shallot – use only between 1st Mayand 30th September. Total max dose 0.75L/ha(up to 4TL stage).

Susceptible @ 0.75L/ha – bindweed, fat-hen,knotgrass, black nightshade & orache

BLW control options in Alliums

BLW control options in AlliumsNew developments in IPM weed control

New developments in IPM weedcontrol

Weed control – using electricity!

Developed by ABA andUbiquitek and trialled underSCEPTRE.

Machine generates 15,000v,heating up and literally‘cooking’ weeds right downto the roots.

Mechanical weed control options……….

Summary

1. Brassicas – Wing-P use pre-planting only!

Springbok and Gamit would be useful in IRE.

Dual Gold – alternative to metazachlor.

2. Alliums – few options for salad onions in IRE!

Totril is going in August 2017, Bromoxinil willhelp to fill the gap

3. IPM weed control – band and vision guidedspot treatment of weeds offer proven results.