New Dual Magnum herbicide registration for small fruit
Dual Magnum is labeled for use on blueberries and caneberries.
The United States Environmental Protection Agency and the Michigan Department of Agriculture and Rural Development have approved a 24c SLN label for use of the herbicide Dual Magnum on several crops, including highbush and lowbush blueberry, and caneberries (blackberry, loganberry, black raspberry, red raspberry).
In blueberries, Dual Magnum should be applied to the soil in a band on each side of the rows of highbush blueberry before weeds germinate. The labeled rate is 0.67 to 1.33 pints (0.64 to 1.27 lb ai) per acre. For lowbush blueberry, apply as a broadcast postemergence (to the blueberries) application before weeds germinate. The rate is the same as for highbush blueberries.
For summer bearing caneberries, apply Dual Magnum in early spring as a band on both sides of the rows at 1 to 2 pints (0.95 to 1.9 lb ai) per acre. For mowed or fall bearing canes, apply as a banded or broadcast application to the soil in the spring before weeds emerge. Use the low rate on light, sandy soil.
Dual Magnum does not control emerged weeds. It suppresses germination of annual grasses and small-seeded broadleaves. It is very active against pigweeds and eastern black nightshade and gives fair to good preemergence suppression of yellow nutsedge. Do not use more than 2 pints per acre per year. There is a 28-day pre-harvest interval.
This is an indemnified label, and growers need to accept all liability for crop injury or yield reduction. The label should be posted soon on the Syngenta website.
Dr. Zandstra’s work is funded in part by MSU’s AgBioResearch.