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Read the latest news from Bayer CropScience Australia.

23 March 2012

Strong on phalaris and annual ryegrass

After two years of trials and evaluation, in soil types ranging from red loams to black Liverpool Plains alkaline soils, Russell Ison, has given the new Bayer released pre-emergent herbicide Sakura® 850 WG, his nod of approval.

The Senior Agronomist with Tamworth Rural says his work has shown perhaps the strongest benefit with Sakura is its long residual effect on weeds.

Russell’s most recent trial in 2011 was in a bread wheat variety. The situation was one of wheat dry sown into durum wheat stubble, so grass weeds were expected to emerge with the crop.

As the season progressed there was a ready germination of grass weeds.

Sakura was trialled alongside other pre-emergent herbicides Boxer Gold®, trifluralin and Stomp® mixed with trifluralin.
All treatments were applied at label rates and sprayed at their respective correct timings.

The crop was sown with a Gyral min-till seeder fitted with knife points. There was about 30% stubble cover at the time of spraying and pre-emergent herbicides were incorporated with the sowing equipment and rainfall just after sowing.

“Generally in this area there is a big issue with annual ryegrass when it emerges with the crop on early rainfall,” Russell said.

“The Sakura treatment was pretty obvious. We took farmers to the site and they easily picked it as the best treatment. Even after three months the effects were still evident.

“Sakura was more robust on the annual phalaris that came up with the crop with faster brownout than the other treatments.

“Phalaris can be particularly difficult to control with post-emergent sprays. Once it gets three to four leaves it can be really difficult because it really needs to be sprayed before the wheat is ready.

“There was a strip through the middle of the treatments where I spread annual ryegrass at about 150 seeds/m2, just to see how it would go. The Sakura did the best job on the ryegrass, then the Stomp and then the Boxer Gold and then the others.

“From my perspective in 2011, I wanted to have a look at Sakura in a different soil type to the year before which was a red loamy soil.
“In 2011 it was put down in a typical Liverpool Plains black soil of high pH with high weed burden made up of a fairly broad spectrum of grass weeds including annual phalaris and annual ryegrass.

“In the 10 x 10 m square patch where nothing was sprayed, there was some barley grass but predominantly ryegrass and lots of phalaris, so it worked really well.”

Russell said pre-emergent herbicides are coming back into favour with growers because farms are getting bigger and the importance of early sowing is well recognised.

He said growers will find Sakura in a high concentrate granule very easy to use.

Tamworth Rural Senior Agronomist, Russell Ison in his Sakura trial which reinforced previous results of strong activity on annual ryegrass and annual phalaris.

- ENDS -

Bayer contact: Craig Pensini
Product Manager Broadacre, Marketing
Phone: 03 9248 6894
Mobile: 0418 466 110

Sakura® is a Registered Trademark of Kumiai Chemical Industry Co, Ltd.

Linked Products

Sakura 850 WG Herbicide

Setting a new standard for pre-emergent weed control Sakura has set new standards of performance, reliability and convenience for pre-emergent control of annual ryegrass – including herbicide-resistant annual ryegrass – and other key weeds in wheat (except durum wheat) and triticale. Sakura is a Group K herbicide that can be applied up to 3 days before incorporation by sowing. It provides extended residual control of annual ryegrass, barley grass, annual phalaris, silver grass and toad rush in wheat (except durum wheat) and triticale. Sakura is also registered for the suppression of brome grass and wild oats. Sakura can be used to control weed populations that have already developed resistance to other chemistry groups. However, where possible it should be used as part of a herbicide rotation to help delay the development of resistance.

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