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Australian Herbicide Resistance Initiative (AHRI)

Double breaks – a double shot at annual ryegrass

Tag Archives | management

Australian Herbicide Resistance Initiative (AHRI)

Double breaks – a double shot at annual ryegrass

Short black, long black, double shot, double break? Coffee preference is a little like crop sequences. Perhaps you’re a ‘short black’ wheat-canola type, strong on inputs? Or a ‘long black’ type who likes to dilute their rotations a bit more? When it comes to managing annual ryegrass populations, Tony Swan and the research team from CSIRO Plant Industry and FarmLink, have shown that ‘double shots’ are the key.

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Stubble

Australian Herbicide Resistance Initiative (AHRI)

Herbicides and stubble – some wash off, some don’t

Which herbicides wash off wheat stubble? Ask any farmer how hard it is to wash the yellow trifluralin stain out of their clothes and you had better be ready for a tirade of domestic hardship! “I just throw them straight in the bin these days”, commented one irate farmer. “I would sooner try and wash off a tattoo than remove that horrible yellow stuff from my work shirts.” No wonder the urban myth tells us that trifluralin was originally developed as clothes dye. If Yaseen Khalil’s recent research is anything to go by, trifluralin would make a wonderful dye and…

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Australian Herbicide Resistance Initiative (AHRI)

New boy band – ‘The Feathertop Rhodes’

Feathertop Rhodes (FTR) Grass is the boy band of the weeds world. They pop up quickly from obscurity (first to germinate after rain), stress easily at the first sign of trouble (dry), and can be all done and dusted in 18 months (short seed life), not to mention that they are downright annoying as well! If you think this is just a Queensland problem, think again. This boy band, I mean weed, has risen to fame in recent years as it has spread from its home in Queensland to playing gigs on road verges all over the country. When faced…

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Australian Herbicide Resistance Initiative (AHRI)

Chaff carts – good for the crop and the sheep

So often in life, there are things that conflict with one another. Take the Australian cricket team for example. Social media is great for the social lives of the players, but it is disastrous for their batting. You simply can’t bat all day in a test match when you have the attention span of a goldfish! Farming is just the same. There are conflicting farming practices. Often what is good for the crop is detrimental to the sheep, and vice versa. Until now. The humble chaff cart is good for both the crop and the sheep. Ed Riggall is a…

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Australian Herbicide Resistance Initiative (AHRI)

Harvester set-up – catch weed seeds and grain

Roger Lowenstein, in his book about Warren Buffett wrote, “Buffett found it extraordinary that academics studied such things. They studied what was measurable, rather than what was meaningful”. When John Broster from CSU and Michael Walsh from Sydney University set out to measure how many weed seeds were entering the chaff fraction in a modern harvester, they were definitely studying what was meaningful, but man was it difficult to measure! In 2014, John and Michael set up trials with five different harvesters in NSW and found, much to their distain, that all of the harvesters were throwing a lot of…

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Australian Herbicide Resistance Initiative (AHRI)

Mungbeans, you will never guess which row spacing is best!

If you have ever tried to use a Philips head screwdriver on a slotted head screw, or hammer in a nail with the back of a spanner, you know how important it is to have the right tool for the job. Mungbeans are often sown with a planter on 1m row spacing that was designed for cotton, maize or sorghum because this is what the grower has and it is hard to have a different planter for every crop. But is it the right tool for the job? We have previously reported on the benefits of narrow row spacing of…

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Australian Herbicide Resistance Initiative (AHRI)

Narrow row spacing – more crop, fewer weeds

It would be really nice if research told us that fast food, chocolate and lollies were better for us than a balanced diet. We could eat what we want without a care in the world. There are those who believe that junk food is good for you, but the science doesn’t support this belief. It would also be nice if research told us that wide row spacing increased grain yield while improving weed control. Wide row spacing is cheap and convenient. Fewer tines or discs to pull, easier stubble handling, good herbicide safety, less fuel and horsepower required, cheaper machinery,…

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Palmer pigweed

Australian Herbicide Resistance Initiative (AHRI)

Warm water

Some things in life are best served warm. It’s just the way it is. The evening meal, toast, custard, hollandaise sauce, herbicide spray water… New research by Devkota and colleagues from Purdue University in the USA tells us that cold water may not be as good as warm water when spraying weeds. They found that when they sprayed giant ragweed and morningglory with a glyphosate + dicamba mix, weed control was improved anywhere from 6% to 26% by using spray water that was 18°C to 39°C compared to 5°C. This response didn’t hold true for all of the weeds in…

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Australian Herbicide Resistance Initiative (AHRI)

Wild oat resistance takes effort

Many young people don’t like the taste of beer, but they know if they work hard, endure the awful bitter taste and hideous hangovers for a few years, they will eventually like the stuff. It takes effort, but if they stick at it long enough they can get there. And, believe it or not, you have to work pretty hard to evolve resistance in wild oats. But if you stick at the same practice long enough (it takes effort), you can get there! We have previously reported AHRI research showing that wild oats evolve resistance slowly because they are both…

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