Technical Bulletins

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Latest Bulletins

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Weed control and ALS resistance management in spring cereals

The area of spring cereals looks set to increase again this year as their inclusion into a rotation provides one of the most effective cultural control techniques to reduce the incidence of black-grass.

In spring cereals, early weed removal (i.e. pre or very early post-em) is critical for maximum yield, grain quality and harvest ability.

However, the incidence of ALS-resistant broad-leaved weeds such as chickweed and poppy is becoming more widespread, especially where spring cereals have typically been grown with the use of repeated low dose post-emergence applications of ALS herbicides.

Picona (containing pendimethalin + picolinafen) and Stomp Aqua (containing pendimethalin) provide ideal options in spring cereals for pre and early post-emergence control of both grass and broad-leaved weeds along with resistance management.

Pendimethalin provides strong residual activity against a wide range of grass weeds such as annual meadowgrass as well as broad-leaved weeds including poppy and chickweed.

Picolinafen compliments the broad-leaved weed activity of pendimethalin by providing residual and synergistic contact activity on a wide range of weeds especially chickweed, cleavers and charlock.

Picona, can be applied from pre-emergence up to GS 30, although best results will come from pre or early post-emergence applications to very small weeds. It is the most flexible and reliable broad spectrum annual meadowgrass and broad leaved weed option. It gives excellent control of poppy and chickweed, even where populations are known to be ALS resistant.

Summary of Approvals