Winter wheat growers could have a brand new blackgrass herbicide to spray this spring, which may very well be significantly helpful as many wheat crops that had been drilled early in dry autumn situations are seeing unhealthy blackgrass and ryegrass infestations.

The new contact herbicide Atlantis Star, from agrochemicals big Bayer, accommodates a brand new energetic ingredient to the unique Atlantis and its best-selling blackgrass product Pacifica Plus, and so has higher management of blackgrass, ryegrass and brome.

Tom Chillott, the group’s cereals herbicide marketing campaign supervisor, says the brand new product could be utilized from February 1 – ideally on the one- to three-leaf stage of blackgrass – as much as Growth Stage 32 in wheat, or about mid-late April.

“The new herbicide reveals a step up in management from Pacifica Plus for grassweed management in wheat, whereas the smaller the goal, the higher it really works, as with all contact herbicides,” he tells Farmers Weekly.

See additionally: Optimism for blackgrass control grows with new herbicide Luximo

Lack of moisture

For these winter wheat growers who drilled early in September into dry seed-beds, residual herbicide merchandise corresponding to flufenacet and diflufenican (DFF) might not have labored in addition to traditional because of the lack of moisture within the soil, that means further management of blackgrass and ryegrass may very well be wanted within the spring.

The new herbicide accommodates iodosulfuron and mesosulfuron – as within the unique Atlantis – plus thiencarbazone-methyl (TCM), which is used as a maize herbicide. Pacifica Plus is one other three-way combine, however of idosulfuron, mesosulfuron and amidosulfuron. TCM is especially taken up by vegetation via the leaves, but it surely has some residual exercise on germinating seeds.

Mr Chillott says the brand new herbicide provides a 5-10% enhance in blackgrass management, is 5-10% higher for ryegrass and 10% higher on bromes in contrast with the group’s main blackgrass contact herbicide, Pacifica Plus. Its spring window of utility means it may very well be combined with T0 or T1 fungicides.

It provides a barely totally different spectrum for broadleaf weed management by changing the amidosulfuron in Pacifica Plus with TCM, and is especially sturdy on sow thistles, poppies and mayweed.

Resistance challenges

All three substances of the brand new product work by inhibiting acetolactate synthase (ALS), so will face related resistance challenges to different spring post-emergence herbicides, and growers are suggested to know their resistance standing earlier than making an utility.

However, Atlantis Star does have a unique mode of motion to residuals, corresponding to flufenacet, DFF, prosulfocarb and pendimethalin, and so it’s helpful to have a couple of of mode of motion in grassweed management, particularly with ryegrass.

Over time, the brand new product is about to exchange Atlantis and Pacifica Plus, and is predicted to be priced at a small premium to Pacifica Plus to mirror its higher grassweed management

Actives

Atlantis Iodosulfuron-methyl-sodium and mesosulfuron-methyl

Pacifica Plus Iodosulfuron-methyl-sodium, mesosulfuron-methyl and amidosulfuron

Atlantis Star Iodosulfuron-methyl-sodium, mesosulfuron-methyl and thiencarbazone-methyl