Arcade EPE Trial

How does efficacy & crop safety compare between Boxer Gold, Arcade, Axial and Achieve when applied EPE in wheat.

Dumbleyung, WA, 2017

Summary

This trial was established near Dumbleyung, WesternAustralia to compare and demonstrate to the David Gray’s extended network theefficacy and crop safety of Boxer Gold, Arcade, Axial and Achieve in Wheat.

In this trial no crop effect was detected with any of theproducts, even at the 600 ml/Ha rate of Axial. The annual ryegrass (ARG) onsite tested positive for group A resistance which showed up in the results.Timing of application was perfect with 17 mm falling the day after spraying.The site, aided by a dry start post seeding had low levels of ARG with multiplegerminations coming through later in the season. Boxer Gold achieved a controlof 87% followed by both rates of Arcade scoring 79%. Axial and Achieveperformed poorly with control below 10% attributed to resistance to the GroupA.

Note:

• Arcade is not yet registered for use as an early post emergent application in wheat.
• Axial is not registered for use at 600mL/Ha. We are just demonstrating the crop safety.                                               

Methodology

Treatment List

 Tmt No.    Product    Rate (Kg or L/ha)    AI Rate (gai/ha)    1    Untreated    -    -    2    Arcade    2.5    2000    3    Boxer Gold    2.5    2000+300    4    Arcade    3    2400    5    Axial    0.2    20    6    Axial    0.3    30    7    Axial    0.6    60    8    Achieve    0.4    160  

Trial Layout

Experimental Design

 Design:    Commercial Demonstration    Replications:    2    Plot length:    60m    Plot Width:    4m  

Site, Crop and Application Details

Assessment Methods

 Assessment Date:    Assessment    21/06/2017    Pre-Spray weed counts    19/06/2017    Control and phyto rating    12/10/2017    Weed counts  

Data Analysis

All data analysis in this report was conducted using Microsoft Excel. Simple means, analysis of variance and the student t-test were used to determine statistical significance using the least significant difference method with a 95% confidence interval.

Results

Pre-Spray Weed Counts

We counted the number of ARG in 10 x 0.25m2 quadrants per plot. The ARG ranged from 1 leaf to 4 leaf. Please see dropbox link at the end of the report with pre-spray photographs

Visual Control Rating (28 DAT)

At 28 DAT weed populations were very low & patchy hence plant counts would have been unrepresentative. Consequently plots were rated subjectively.

110 DAT Weed counts (% control vs untreated)

Due to the late/dry start, the normal assessment timings proved difficult and non-representative as the ARG germination was patchy. Hence we came back at 110 DAT when the ARG plants were more visible. We counted the total number of ARG plants in 10 metres of plot per treatment. We feel that this gave us a representative result of the level of final control achieved by each of the treatments.

Conclusion

Arcade and Boxer Gold performed brilliantly compared withthe alternatives. This trial demonstrates what can be expected when you can gettiming of application spot on. With growers sowing earlier than ever,pre-emergents are likely to lose activity before the last germination of ARG,especially in a dry start to a season when pre-emergents perform poorly aswhole and ARG germinations are later than normal.

An EPE application of Boxer Gold or Arcade is an effective strategy to improve ARG control over a longer period. Please see photographs in the appendix which show the level of control achieved.

Appendices

Rainfall

Photos

Untreated:

2.5L Arcade:

See below dropbox link to photos and videos at each assessmentdate:

https://www.dropbox.com/sh/frdjvbl7zuockbg/AADut9-Q3q8fJWkYvQJZdNf5a?dl=0