A future with Arylex Active
An active ingredient takes decades to bring to the market. Arylex™ active is a new, innovative, low-dose growth regulator herbicide for the control of broadleaf weeds in multiple crops. It was launched in Australia last year in Paradigm™ and ForageMax™ herbicides.
Discovered by and proprietary to Dow AgroSciences, Arylex is the first member of a new structural class of synthetic auxin herbicides called Arylpicolinates, mode of action Group I. Arylex has some distinctly different properties to the other sub-groups within this mode of action classification.
Arylex provides selectivity to crops and a unique spectrum of selective, post-emergence control of annual broadleaf and some activity on certain perennial weed species. Symptoms occur within a few hours and are typical of growth regulators.
“Our first observation on the day following the spray was that it was much faster. We could already see twisting and curling of the leaf edges” reported Justin Tidd, agronomist, southern NSW. “It was a very fast response and provided a quicker and more complete kill compared to our standard. That early speed of breakdown and plant decay is probably the real benefit of Paradigm.”
Post-emergence use in cereals needs just 5 grams of active per hectare whilst 10 g/ha is needed for weed control in forage brassica crops. “This low use rate has tremendous benefits to users (less and smaller packs for easier handling, transport and storage and for the environment ” outlined Dan Dixon, Cereal Marketing manager for Dow AgroSciences. Low active use rates also increase the compatibility profile of a product. Paradigm for example, has been widely used with a huge number of tank mix scenarios. “We haven’t heard of any tank mix incompatibility issues as yet”, stated Mr Dixon, “and the agronomy network certainly tested it out in the launch year!”
Arylex rapidly degrades in soil and plant residues, and generally does not persist long enough to impact rotational crops in the following season. This rapid breakdown allows growers rotation flexibility, with plantback to most cereals being as short as a week. In addition, degradation within cereals is rapid, preventing the accumulation of herbicide residues in straw.
“Rotational flexibility can be critical for growers, with global market pricing for many commodities becoming more volatile. Therefore growers want to be able to take advantage of good prices when they can” added Mr Dixon. “There are some products on the market that can restrict crop choices for months and even years after application, depending on management and conditions. With this in mind we are evolving the Arylex product offerings to include even more flexible rotational options and reduce the complexity involved in making herbicide choices.”
One of the new products with a forecast launch for 2017, Pixxaro™ Arylex active herbicide, will be trialled under an APVMA permit in 2016, to allow the agronomic community to test the product in their environment. “We are excited about the benefits that Pixxaro will offer growers and their advisors. Having new actives to fit into a market is an exciting time and the agronomy network is really getting behind the Arylex concepts”, stated Mr Dixon. Pixxaro will be the first product to be evaluated under Dow AgroSciences’ Field Forward demonstration programme. “The Field Forward program offers growers and their advisors valuable experience with technology as products move through the regulatory process and it gets us a step closer to the farmer at a critical time in our planning processes,” Mr Dixon added. “Not only are we able to offer valuable technology experiences to farmers, but we also gain critical product feedback.”