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Callisto Pre-emergent control of BLW

By Dumbleyung 2020, Dumbleyung Pre-Emergent Herbicides 2020

Objectives

1.How does the addition of a sequence partner to Callisto compare to Callisto applied alone with respect to efficacy and crop safety?

2. How does the efficacy of Callisto plus a sequence partner compare to post emergent commercial standards?

Background

The trial was sown on the 4th of June in Dumbleyung, WA.  The pre-emergent application was IBS and the post-emergent applications were sprayed at the 4-6 leaf stage. Wild Radish and volunteer Bonito canola were spread before IBS treatments at 8 plants/m2 to mimic a medium-high weed burden. The GRS was 240ml. Calisto has a new mode of action, in group H, registered for pre-emergent control of group B, C, D, F and I resistant weeds.

PRE SEEDING

Early Knockdown – 16/3/2020: Nufarm Weedmaster DST 1.5L/ha, BASF Sharpen 20g/ha, Hasten 1%, Ammonium Sulphate 1%.

Early Knockdown – 23/3/2020: Nufarm Weedmaster DST 1.5L/ha, BASF Sharpen 20g/ha, Kamba 750 200ml/ha, Hasten 1%, Ammonium Sulphate 1%.

Immediately Pre-seeding – 3/6/2020: Nufarm TriflurX 2L/ha, Syngenta Paraquat 1L/ha, Conquest Alpha-Forte 250 SC 40ml/ha.

Early Nitrogen Application – 3/6/2020: CSBP Flexi N 80L/ha.

SEEDING

Seeding – 4/6/2020: Wheat Scepter 70kg/ha, Double Phos 130kg/ha, Sulphate of Potash 50kg/ha, Evergol Energy seed treatment 130ml/100kg, Impact Infurrow 400ml/ha.

POST-EMERGENT 

Nitrogen Top-up- 10/7/2020: CSBP Flexi N 80L/ha

Results

 Percentage control rating of Radish, assessed at 3WAS, 6WAS and 11WAS.

Emergence counts 6 WAS (plants/m2)

Whole plot weed counts of Wild Radish and Volunteer canola 6 WAS.

Photos

Colt + LVE Agritone EPE

Paradigm + LVE Agritone + Uptake EPE

Callisto IBS

Logran IBS

Callisto fb Ally + LVE Agritone + BS1000

Control

Callisto fb Colt + LVE Agritone

9.9.2020

Control

Callisto fb Colt + LVE Agritone

Callisto IBS

Logran IBS

Callisto fb Ally + LVE Agritone + BS1000

Paradigm + LVE Agritone + Uptake EPE

Colt + LVE Agritone EPE

Key Findings

  • At 6 WAS there was no significant difference between Callisto used standalone and Callisto followed by a sequence partner.
  • Calliso Verse had better weed control than the other treatments, with the exception of Logran which had no significant difference with volunteer canola control.
  • Callisto followed by a sequence partner increased residual activity 11 WAS by an average of 15% compared to Callisto stand alone. However, no significant difference to Colt + LVE Agritone and Paradigm + LVE Agritone.
  • No phytotoxicity 3WAS and 6WAS
  • Distinctive bleaching of broadleaf weed cotelydons 3WAS
  •  Callisto’s active (Mesotrione) is a group H, therefore the sequence partner must be in a different group.
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