Ground Cover North : Ground Cover 055 April-May 2005 - North
11 dates, for any date of sowing. The user can define frost, and critical high temperature events, in terms of severity and duration. Parameter data enables flowering time to be calculated for a selection of varieties for each of several crop species, using a range of phenological models. The table shows the predicted flowering dates in three regions using the Flowering Calculator. ∆GRDC Research Code DAW00012. For more information: Wal Anderson, 08 9892 8412, firstname.lastname@example.org New varieties summarised, pages 16-19 ‘THE FLOWERING CALCULATOR IS A TOOL THAT ENABLES AN ADVISER OR GROWER TO COMPARE FLOWERING DATES RELATIVE TO THE RISKS OF FROST AND WATER STRESS DURING GRAIN DEVELOPMENT’ Predicted Time of sowing 1 May 15 May 1 June 15 June CARNAMAH REGION Westonia 22 July 11 August 1 September 15 September WyalkatchemA 27 July 15 August 5 September 19 September CarnamahA 31 July 20 August 9 September 23 September Calingiri 1 August 21 August 10 September 24 September BEVERLEY REGION Westonia 6 August 26 August 15 September 27 September WyalkatchemA 11 August 31 August 19 September 1 October CarnamahA 17 August 5 September 23 September 5 October Calingiri 18 August 6 September 24 September 6 October KATANNING REGION Westonia 17 August 5 September 24 September 7 October WyalkatchemA 23 August 10 September 29 September 11 October CarnamahA 29 August 16 September 3 October 15 October Calingiri 30 August 17 September 4 October 16 October Research update APRIL/MAY 2005 GROUND COVER ® Registered trademark of a Syngenta Group Company ABN 33 002 933 717 For further information on products please contact the Syngenta Technical Product Advice Line: Freecall 1800 067 108 Freefax 1800 805 871 or visit our website at www.syngenta.com.au SSYN3040 GC HPA 04/176 Key benefits of SPRAY•SEED. • Resistance management tool – unique mode of action (Group L) for rotation with glyphosate. • Unrivalled speed of action – weeds are desiccated rapidly providing root release and improved seedbed before sowing. • Real rainfastness – SPRAY•SEED is rainfast in minutes providing flexibility at time of sowing. • Excellent compatibility – SPRAY•SEED can be mixed with many other herbicides and insecticides. • Crop Safety – SPRAY•SEED is non-systemic. It does not leave available residues in the soil, water or produce. • Broad spectrum weed control – as a contact, non-selective herbicide SPRAY•SEED controls a broad range of weeds. Please contact your local reseller for more information. Now you can join the many farmers who use SPRAY•SEED effectively in rotating their knockdown herbicides for a sustainable future. Rotate now for a sustainable future. Is time running out for glyphosate? Annual Ryegrass resistance to glyphosate has been confirmed at over 40 sites across NSW, Vic, SA and WA. A recent survey in northern Australia has identified 6 other weed species with perceived high risk of developing glyphosate resistance. Rotating herbicides helps prolong their effective life. Protect glyphosate by using SPRAY•SEED in rotation. No more flowering guesswork for WA growers KEY POINTS n Data collected in 2003 and 2004 have been used to update the ‘Flowering Calculator’ n Predictions for key locations and more than 16 varieties are available to assist in determining sowing sequences to maximise yield and minimise frost risk n The choice of sowing date and variety is the key to maximising yield potential. Earlier sowing should mean better water- use efficiencies and higher yields. However, the successful adoption of this strategy hinges on matching variety to sowing time to maximise growth and to minimise the likelihood of frost damage after flowering – and also to minimise the impact of hot weather and terminal drought during grain fill. The Flowering Calculator is a tool that enables an adviser or grower to compare flowering dates relative to the risks of frost and the likelihood of experiencing water stress during grain development. The calculator provides a procedure to determine flowering date using average daily temperature and day length. The user can ‘interrogate’ daily temperature records to provide information on: n the incidence of frost and critical mean temperature events after flowering; n high temperature events towards the end of grain filling; and n variation in flowering time. Outcomes for a range of crop varieties can be assessed relative to user-defined flowering windows and end-of-season Dark-shaded areas represent the estimated ‘ﬂowering window’ for the three regions. From the mid-May sowings, the predicted ﬂowering dates closely correspond to actual ﬂowering dates observed in the ﬁeld. Early May predictions tend to underestimate the ﬂowering time. Additional information on varieties and regions will be available at the Crop Updates.
Ground Cover 056 June-July 2005 - North
Ground Cover 054 February-March 2005 - North