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Two-spray strategy outmanoeuvres crop weed

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Posted March 18, 2014
Two-spray strategy outmanoeuvres crop weed
“Herbicide-resistant wild radish can be controlled well by a range of herbicides if applied early when weeds are small,” Mr Thompson says. Credit: M.M. R
A strategy that applies herbicides to crops at two different times has been found to effectively combat weeds including wild radish (Raphanus raphanistrum) in northern Wheatbelt crops.

Consulting agronomist Grant Thompson says that after decades of spraying, the weeds are becoming locally resistant to certain herbicides.

“In our worst cases we [have] got populations that are showing resistance to three or four different herbicide groups in the one individual plant,” he says.

He says it is important for farmers to know their own paddock’s resistance status, which will then inform their best mode of action for success.

“We had a little consulting group,” he says.

“We put together a list of the trial protocols to make sure that we all had a say in what work needed to be done, what treatments needed to be tested.”

The group, known as Regional Cropping Solutions Network (RCSN), wished to provide a best-practice management guide to growers dealing with Multiple Herbicide Group Resistant Radish.

 

Read more at: Phys.org

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