;

Australian Herbicide Resistance Initiative (AHRI)

Sow west young man

Tag Archives | management

Researcher in field

Australian Herbicide Resistance Initiative (AHRI)

Sow west young man

“Washington is not a place to live in. The rents are high, the food is bad, the dust is disgusting and the morals are deplorable. Go West, young man, go West and grow up with the country”. Horace Greeley, 1865. Horace believed that going west to fertile farm land would be the answer to poverty and unemployment in the USA. Sowing west could be part of the answer to weed management. There is a new kid on the block in the competition between crops and weeds, and the best thing about it is that it is FREE! East-west sowing is…

Continue Reading
People in field

Australian Herbicide Resistance Initiative (AHRI)

Burning wet windrows

Ten years ago in WA we made a big song and dance about burning narrow windrows to destroy weed seeds and many grain growers jumped on board for the first time. You’ll never guess what happened! Summer rain, and plenty of it. When we came out of hiding (expecting to be lynched by farmers with burning torches) we were pleasantly surprised to find that the windrows actually burnt really well after they were given a couple of weeks to dry out. Another up-side was it was easy to keep the fire in the windrow. In 2011 when AHRI ran workshops…

Continue Reading
Wild radish flower

Australian Herbicide Resistance Initiative (AHRI)

Left jab, right hook

“Float like a butterfly sting like a bee – his hands can’t hit what his eyes can’t see.” Muhammad Ali. A good boxer uses combinations of punches to beat his opponent. A good farmer uses diverse combinations to beat weeds. Herbicides and crop competition are the left jabs, harvest weed seed control is the right hook that delivers the knock-out blow. In 2008, AHRI researcher Dr Michael Walsh and colleagues published a paper showing that 2,4-D resistant wild radish could be controlled by 2,4-D if there was elevated wheat crop competition. This demonstrates that if weeds are noticeably affected but…

Continue Reading
Map

Australian Herbicide Resistance Initiative (AHRI)

Glyphosate resistant wild radish

Where were you when you first heard that Princess Dianna had died? Where were you when Glenn McGrath made 50 runs? And, where were you when you first heard that wild radish had evolved resistance to glyphosate? Ok, it’s not quite as big as Glenn McGrath making 50 (he made 61 in fact), but it is big news for Australian agriculture that will cause many of us to re-think how we use glyphosate in the future. Three glyphosate resistant wild radish populations were discovered by AHRI PhD scholar Mike Ashworth, all were from the northern wheatbelt of WA. Two populations…

Continue Reading
Piece of grass

Australian Herbicide Resistance Initiative (AHRI)

Just add water

It regulates Earth’s temperature, our bodies need it when we’re thirsty, and it covers about 70% of Earth’s surface. Water is essential for a number of reasons, and here is one more. Most Australian growers and agronomists would expect that 2.5 L/ha trifluralin or the full label rate of Sakura® would give between 70 and 90% ryegrass control in crop. However, research by Dr Catherine Borger (DAFWA Merredin, WA) has shown that it depends on how you apply it. Catherine found that ryegrass control with Trifluralin or Sakura® increased from 53% to 78% as the carrier volume increased from 30…

Continue Reading
Grass

Australian Herbicide Resistance Initiative (AHRI)

Focus

Australian golfer Adam Scott keeps his eye on the ball. His ability to concentrate and focus amongst the chaos of a major golf tournament is outstanding. We would all love to focus on one task and do it well, but the reality of life is that we are rarely afforded this luxury. For grain growers, managing resistant weeds is just another thing to fit into the complexity that is farming. Growers that afford themselves the time and motivation to focus on managing resistant weeds are having a win. They declare war on the weed seed bank and have a ‘take…

Continue Reading
Windrow burning

Australian Herbicide Resistance Initiative (AHRI)

Windrow burning – a good place to start

The best option to maximise the weed seed bank is to harvest high and spread all of the weed seeds evenly over the paddock. This will give you something to spray next year. If you, like most others, feel that this is a bad idea, it may be time to start narrow windrow burning. Narrow windrow burning is a good place to start to see if this harvest weed seed control caper is all it is cracked up to be. The first step is to spend some time familiarising yourself with a beer can. The internationally accepted harvest height when…

Continue Reading
Machines plowing field

Australian Herbicide Resistance Initiative (AHRI)

To win the war you must win the battles

As Darkan farmer and inventor of the Harrington Seed Destructor, Ray Harrington, aptly says, “Harvest weed seed control is a pain in the ….” – but it is an imperative tool in continuous cropping systems”. “To win the war you must win the battles. Harvest weed seed control is an important battle. If you’re not implementing weed seed control at harvest, you’re out of the farming game”. It’s a tough message to hear, and it’s one that growers from Wagin, Lake Grace and Ravensthorpe in Western Australia heard at AHRI’s “More crop, less weeds – sustainably!” workshops last week. The…

Continue Reading
Grass

Australian Herbicide Resistance Initiative (AHRI)

Pollen flow of resistance genes

“It wasn’t me, it was him!” Many grain growers blame their neighbours for developing herbicide resistance. Growers often feel helpless! Regardless of how well you manage your weeds, unfortunately it is inevitable that you will inherit the resistance problem from your neighbour. It is true that resistance genes can flow a long way in pollen. AHRI researcher Dr Roberto Busi demonstrated that ryegrass pollen can travel up to three kilometres. More research in theUShas shown that gene flow via pollen varies between species, depending on the level of out crossing and pollen characteristics. It is no surprise that the resistance…

Continue Reading
Nature landscape of grass trees and sky

Australian Herbicide Resistance Initiative (AHRI)

Think outside the drum

If herbicides alone were the answer to all of our weed problems we would have eradicated crop weeds years ago. Most of us now realise that to achieve true weed control success we need to add non-herbicide tools into the mix. It doesn’t matter which weed, which crop, or which country we are talking about, the benefits of good cultural practices apply everywhere. Some excellent long term Canadian research has confirmed how important it is to combine good cultural practices with herbicide use. The Agri-Food Canada trials show that after nine years of full herbicide rate, high barley seeding rate,…

Continue Reading