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Beacon

Seed applied treatment for the control of Crown rot in wheat

By Beacon, Fungicides

Pending registration, Syngenta’s new seed dressing is referred to as ‘SD’ throughout this document. 

Objectives

  1. How does Vibrance compare to standards in the control of crown rot?
  2. How does Syngenta’s new seed dressing (SD) compare to standards in the control of crown rot?
  3. How does Vibrance/Syngenta’s new seed dressing (SD) compare to standards in the control of crown rot?
  4. Are treatments safe to the crop?

Background

The trial was sown on the 19th of May in Beacon, WA. The site has a history of crown rot.

PRE-SEEDING 

Immidiately Pre-seeding – 19/5/2020: Treflan 1.5L, Ammonium sulphate 1%, Diuron 900 WDG 180g/ha, Sakura flow 210ml/ha, Pyrinex  super Insecticide 250ml/ha.

SEEDING

Seeding- 19/5/2020: Wheat Scepter 63kg/ha, Flexi N 40L/ha, K-Till Extra 48kg/ha.

Seed treatments: Applied 1 week prior to planting, as per design.

Results

Emergence ratings at assessments 14 & 28 DAS.

Crown to first node discoloration incidence and severity, percentage (%) of browning Mid grain fill (10/9/2020)

Crown discoloration incidence/plot 16 WAS

Yield

Key Findings

  •  Emergence counts conducted at 14 & 28 DAS saw no significant differences between treatments (P>0.05).
  • Crown to first node discoloration incidence and severity percentage ratings were low due to a lack of disease in the crop.
  • Crown discoloration was observed only in the untreated, Vibrance 360ml/100kg and Rancona Dimensions 320ml/100kg.
  • SD seed treatment stand alone at 1x, 2x and 3x rate as well as SD 1x + Vibrance all compared well to standards in the control of crown rot.
  • The addition of Vibrance to SD  improved disease control.

Emergence Photo’s 28DAS 24/6/2020

SSD 3xml/100kg

SSD 2xml/100kg

Untreated Control

Vibrance 360ml/100kg

Rancona Dimension 320ml/100kg

Evergol Energy 260ml/100kg

SSD 1xml/100kg

Vibrance + SSD 180ml + 1xml/100kg

Basal browning assessment 7/10/2020

Control vs Vibrance 360ml/100kg

Control vs Rancona Dimensions 320ml/100kg

Control vs Rancona Dimensions 320ml/100kg

Control vs Evergol Energy 260ml/100kg

Control vs  SSD 1x ml/100kg

Control vs SSD 2x ml/100kg

Control vs SSD 3x ml/100kg

Control vs Vibrance 180ml/100kg + SSD 1x ml/100kg