New herbicide labels for Michigan fruit growers
EPA approves labels for Stinger on blueberry, SelectMax on bushberry, caneberry, and peach, Sandea on apple and blueberry, and Spartan on strawberry.
Several new herbicide labels are available for fruit growers in 2011. The U.S. Environmental Protection Agency (EPA) has approved several uses of Stinger, SelectMax, Sandea, and Spartan for fruit crops.
Sandea (halosulfuron) 75 WDG is labeled for use on apple and highbush blueberry. In apple, Sandea may be applied at 0.5-1 oz product per acre (0.023-0.047 lb active ingredient) for preemergence and postemergence control of many broadleaves and yellow nutsedge. For nutsedge control (its main use), apply 0.75-1 oz Sandea after nutsedge is well established and most of the plants are at the 5 leaf stage or larger. A second application may be made 3-4 weeks later to kill residual live nutsedge plants. Do not use more than 2 oz product per acre per year. The preharvest interval (PHI) is 14 days.
In blueberry, for yellow nutsedge control, apply 1 oz of Sandea when nutsedge has achieved a dense stand and most plants have 5 leaves. A second application may be made 45 days later. Include a nonionic surfactant (NIS) at 0.25% v/v in the spray solution. Do not allow Sandea to contact the blueberry bushes. Do not exceed 2 oz product per acre per year.
Michigan received a SLN (Section 24c) label for use of Stinger 3L (clopyralid) 3L in blueberry. Stinger is a hormonal postemergence herbicide for control of composite weeds (dandelion, daisies, thistles, ragweed, horseweed, goldenrod, etc.), legumes (clover), nightshades, and smartweeds. It has very little activity on other species. Apply 2.7-4 fl oz/acre (0.063-0.125) for control of these weeds. (See the label for rates for each species.) Do not apply within one week of the beginning of bloom to one week after the end of bloom. Stinger may be applied after harvest. There is a 30 day PHI.
SelectMax 0.97 E is a postemergence grass herbicide (graminicide) for control of annual and perennial grasses in many crops. The new supplemental label adds uses on bushberry (highbush blueberry), caneberry, and peach to the federal Section 3 label. SelectMax should be applied at 9-16 fl oz (0.07-0.12 lb ai) per acre. The low rate should be sufficient for most small annual grasses. Use the higher rate for large annuals, perennials, and annual bluegrass. Always include NIS at 0.25% v/v or crop oil concentrate (COC) at 1.0% v/v in the spray mix.
Spartan 4F is now labeled for use on strawberry. It may be applied before transplanting a new crop or before emergence of an established crop in the spring or at renovation. Avoid Spartan contact with new strawberry growth to avoid crop injury. Apply Spartan at 4-8 fl oz per acre (0.125-0.25 lb ai), using the lower rates on light soils with <1.5% organic matter (OM). Spartan will improve control of field pansy, common groundsel, common lambsquarters, mayweed, pigweeds, pineappleweed, white campion, and yellow nutsedge. Spartan should be used in combination with other residual herbicides for broad-spectrum weed control.
These and other labels can be downloaded from the Internet at CDMS.net.