What is the best pre-emergence stacking combination or sequence?

Jon Helliwell, Bayer black-grass task force member is asked “What is the best pre-emergence stacking partners or sequence to use with Liberator?” Jon points out that Bayer carry out trials all over the country to assess the best options for farmers to use for their pre-emergence black-grass control. Liberator provides the best starting point and is a tried and trusted base. Where black-grass is a concern, particularly where resistance is creeping in a tank-mix partner for liberator to boost control is advisable. Active ingredients like prosulfocarb, pendimethalin or triallate in sequence.