The 2015/16 issue of the AWRI publication Agrochemicals registered for use in Australian viticulture (‘Dog book’) is now available. This agrochemical update summarises the major changes in the 2015/2016 ‘Dog book’ compared with the previous version.
Timing chemical application to growth stage
The following statement was emphasised on page 3 in the 2014/15 edition to better meet target withholding periods and satisfy export market maximum residue limits (MRL).
GRAPEVINE GROWTH-STAGE CAN BE VARIABLE ACROSS A BLOCK. WHEN ASSESSING GRAPEVINE PHENOLOGY FOR THE PURPOSE OF APPLYING AGROCHEMICALS, BASE THE ASSESSMENT ON THE MOST ADVANCED VINES IN THE BLOCK TO MINIMISE THE POSSIBILITY OF RESIDUES AT HARVEST.
To reiterate this, the following text was added on page 12 under ‘Growth stage description’:
GROWTH STAGE ASSESSMENTS ARE NOT AN AVERAGE ACROSS THE VINEYARD. BASE ALL GROWTH STAGE ASSESSMENTS ON THE MOST ADVANCED VINES IN THE BLOCK.
Registered products list
The list of registered products (pages 15-21) is now printed in black and white to distinguish it from the recommendations section. The purpose of the recommendations section is to provide withholding period advice for export markets.
A new footnote about the application rates of products containing pyrimethanil states: ‘Apply no more than 800 g active per hectare (maximum 2L of 400SC and 1.33L of 600SC formulations)’.
Pyrimethanil products include Predict 600 SC, Protector 400SC, Pyrus 400 SC and Scala 400 SC.
Active constituents and targets
Emblem has been granted registration by the Australian Pesticides and Veterinary Medicines Authority (APVMA) for control of Eutypa in grapevines.
Emblem is a Crop Care Australia Pty Ltd product. It contains the active constituent fluazinam. It should be applied as a dormant treatment within 24 hours of pruning. Application should be made as a directed spray in a water volume that ensures thorough coverage of the pruning cuts.
Restriction on use for export grapes: Not required when used as directed.
New restrictions on use in ‘Dog book’ recommendations section
Chlorothalonil is an activity group M5 fungicide registered for control of black spot, botrytis bunch rot and downy mildew. The restriction on use for registered products containing chlorothalonil is now: ‘Use no later than E-L 29, berries peppercorn size (4 mm diameter)’.
Myclobutanil is an activity group 3 fungicide registered for control of powdery mildew. The restriction on use for registered products containing myclobutanil is now: ‘Use no later than 30 days before harvest’.
This information is provided to inform the Australian grape and wine sector of agrochemical information. It should not be interpreted as an endorsement of any product.
If you have any queries about this agrochemical update or would like a copy of the ‘Dog book’ sent to you, please contact the AWRI Viticulture team at firstname.lastname@example.org or on 08 8313 6600.