03 December, 2002
CSD has made available three Roundup Ready varieties for the 2001 season: Sicala V-2RR, Sicala V-3RRi and Sicot 189RR.
There are currently no limitations on the quantity of these varieties available to individual growers, or on the area that can be planted to Roundup Ready varieties by individual growers.
However, approval must be obtained from Monsanto prior to ordering Roundup Ready seed from distributors, which initially involves an accreditation process, to ensure that growers fully understand how the new technology must be managed.
The pest and disease attributes of the three CSD Roundup Ready varieties available in 2001 are as follows:*Variety**Verticillum**FOV Rank**Prem. Sen. Alternaria *Heliothis * Sicot 189RR Good Tolerancep. 82 (2) Tolerant Tolerant Susceptible Sicala V-2RR Good Tolerancep. 74 (2) Tolerant Tolerant Susceptible Sicala V-3RRi Good Tolerancep. 72 (2) Tolerant Tolerant Tolerantp. V-3RRi, a new variety, has performed exceptionally well across a wide area of the cotton belt in CSD trials in 2000, as can be gauged by the following yield data. It is also regarded as an ideal fit for Ultra Narrow Row configurations.
As a result of the trial and commercial performance of each of CSD’s three Roundup Ready varieties, they are recommended for planting in the following areas:Sicot 189RR Sicala V-2RR Sicala V-3RRip. Lachlan Tandou Bourke Macquarie Namoi Gwydir Macintyre Darling Downs Lachlan Tandou Bourke Macquarie Namoi Gwydir Macintyre Darling Downs Bourke Lower Namoi Gwydir Macintyre St George Dirranbandi Western Downs Central Queensland
Other new Roundup Ready varieties currently undergoing seed increase for future release include Sicot 289RRi, V-16RR, V-16RRi, 40RR and 40RRi.p. All Twingard (two separate Bt genes) varieties under development, for commercial release from 2003-04 (pending approval), are also being stacked with and without Roundup Ready attributes.
Roundup Ready varieties provide a new productivity tool for growers, with several benefits, including adaptability for dryland and UNR systems, planting direct into cereal stubble, and providing greater farming systems flexibility.
Because the technology is relatively new in Australia, these opportunities have been offset by some management challenges that may take time and ingenuity to overcome.
Particular problems include how to manage Roundup resistant volunteer cotton; managing Roundup Ready cotton re-growth towards the end of the season; gauging the length of time taken for crops in different areas to reach the four leaf stage; management of other herbicides; and limitations involving over the top sprays.
Further information in relation to benefits and problems associated with growing Roundup Ready varieties can be obtained by contacting the following CSD extension and development personnel:
Further Information: *"Robert Eveleigh**, John Marshall, Greg Kauter or Craig McDonald":showstaff.asp?staff=1
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