16 February 1996

Mixing for savings

MIXING reduced rates of "fop" and "dim" herbicides can bring savings of £3-5/ha (£1.20-2/acre) when controlling grass weeds and volunteers in autumn sown oilseed rape, according to an HGCA-funded trial at ADAS Boxworth.

The field trial used volunteer wheat to simulate grass weeds in oilseed rape. The products used were the "fops" quizalofop-ethyl (Pilot) and fluazifop-P-butyl (Fusilade) and the "dims" cycloxydim (Laser) and sethoxydim (Checkmate). Applications were at the 2-3 leaf or 1-2 tiller growth stages of the wheat.

The most active mixes, with the active ingredient measured in litres/ha, were Fusilade and Laser (0.25 and 0.125), Laser and Fusilade (0.25 and 0.125) and Fusilade and Checkmate (0.25 and 0.09). All benefitted from the addition of Actipron additive.

The results are said to support previous research which showed success from using lower rates of "fops" and "dims" in mixtures." &#42