GRAIN growers keen to attain some residual weed control from their early post-emergent broadleaf herbicide application, plus utilise a new option to improve resistance management, will be excited by the registration of a new herbicide on the eve of the 2014 cropping season.Triathlon is a unique, broad spectrum herbicide for use in winter cereals that contains three active ingredients ( diflufenican, bromoxynil and MCPA) from three different herbicide groups (Groups F, C and I).
Applied from the 3-leaf crop growth stage, it is highly effective against 47 broadleaf weeds, including hard-to-control wild radish as well as capeweed, doublegee, volunteer canola, wireweed and wild turnip.
Triathlon, from Adama, has shown promising activity on certain herbicide resistant wild radish populations and extensive testing has also shown excellent crop safety across multiple varieties.
Last year in trials at Walla Walla in New South Wales against toad rush, wireweed and capeweed; at Beverley and York in Western Australia and Roseworthy in South Australia against wild radish; and at Colbinabbin in Victoria against volunteer canola, it performed very well when compared with newer post-emergent broadleaf weed control standards.
In a previous trial at Wongan Hills in WA, there were significantly less emerged weeds 34 days and 41 days after application when applied at higher rates and compared to other post-emergent broadleaf herbicides.
Adama Senior Product Manager Jock Leys said Triathlon’s three modes of action could reduce the need to include other herbicides with it, while its good residual activity could improve yields and reduce the need for second sprays in many situations.
“With the three herbicide modes of action, Triathlon is an ideal choice for those farmers with suspected resistant weeds or those just hoping to rotate and avoid resistance ,’’ Jock said.
“It is vital to rotate all available modes of action to help extend the life of existing herbicides and to also employ non-chemical weed control practices such as windrow burning, spray-topping and weed seed collection at harvest.’’
He said in suitable situations, it could be highly effective to apply Triathlon at the 3-leaf crop growth stage, minimising the effects of weeds on crop yield whilst also gaining some residual weed control to reduce the likelihood of later germinating weeds emerging and affecting crops.
Compatible with a wide range of herbicides as well as insecticides, fungicides and liquid fertiliser, Triathlon is recommended to be applied at rates from 250mL up to 1000mL per hectare depending on the target weed and weed size. Water volumes should be at least 50 litres/ha and preferably higher to achieve maximum leaf and soil coverage, as two of the three active ingredients rely primarily on contact activity.
Triathlon’s knockdown control is better on smaller weeds and application when crop canopies are relatively open, allowing the herbicide to reach the ground, will help maximise the residual activity.
The release of Triathlon in time for the 2014 season is well timed coinciding with the ramping up of the industry wide ‘WeedSmart’ initiative. ‘WeedSmart’ is an industry wide initiative including key industry partners such as Adama, other herbicide manufacturers, GRDC, universities and advisory firms. Triathlon will be a valuable new tool for growers and agronomists to incorporate into their weed control programs and fits well under the weed control principles espoused under ‘WeedSmart’.
For more information contact:
Senior Product Manager