WEED CONTROL

Herbicide Residue

Pursuit (imazethapyr) may carry over in soil and affect some
broadleaf crops for more than three years. Rate of breakdown is
greater in high pH soils than in low pH soils. Therefore,
carryover is greater in low pH soils than in high pH soils.
Rotational crop restrictions for Pursuit applied at 3 fl oz in
soybean or 2 fl oz in dry bean are found on page 64 of the 1996
North Dakota Weed Control Guide in the table, "Rotation
Restrictions for Crops Grown in North Dakota". Long-term crop
rotation planning should be considered before using Pursuit since
soil residue may last several years. Pursuit as spray drift or
sprayer contamination causes severe injury to susceptible crops
such as sugarbeet and sunflower. Thorough cleaning of a sprayer
is required to prevent contamination of subsequent sprays and
injury to susceptible crops. See section on sprayer cleanout for
additional information.