EPA issues new herbicide labels for vegetable crops

Sandea labeled for rhubarb, cowpeas, southern peas, and okra; Spartan labeled for strawberry and tomato

The US Environmental Protection Agency (EPA) has approved a label for use of the herbicide Sandea 75 WDG (halosulfuron) for use on several fruit and vegetable crops, including apple, highbush blueberry, rhubarb, succulent shelled peas and beans (Vigna species: cowpea and southern pea), and okra.

Sandea must be applied to dormant rhubarb before any new growth begins in the spring. In many locations in Michigan, rhubarb already has begun to sprout and expand. Some colder and northern areas may still be dormant and have potential for herbicide application this spring. Sandea may be applied at 0.5-1 oz product per acre (0.023-0.047 lb active ingredient/acre) for preemergence control of many broadleaf weeds and yellow nutsedge. However, with application in early April, most of the Sandea will be dissipated by the time of nutsedge germination. Sandea can cause serious rhubarb stunting, so use the lower rate to gain experience with its use, and apply only to totally dormant plants. Sandea will not control grasses, and it is weak on eastern black nightshade and common lambsquarters. It should be used with other herbicides for broad spectrum weed control. Do not apply within 60 days of harvest.

Sandea may be applied after seeding cowpeas and southern peas. Sandea can cause serious stunting and crop thinning of southern peas, and growers must be willing to accept some stand loss. Apply 0.5 oz of product per acre for control of most broadleaves and yellow nutsedge.

In okra, apply Sandea as a directed spray between rows of seeded or transplanted okra. Avoid contact with the crop. If okra is grown on plastic, apply Sandea to the area between the plastic after planting. Apply 0.5-1 oz of product per sprayed acre. One additional application (total of 2 oz per year) may be made during a crop cycle.

Sandea is an excellent herbicide and this label should help growers of these commodities to maintain good weed control and improve productivity and profits.

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.

Spartan 4F may be applied before transplanting tomato to control common lambsquarters, redroot pigweed, waterhemp, and yellow nutsedge. Apply 2.25-8 fl oz Spartan 4F (0.063-0.25 lb ai) before transplanting tomato. Use low rates on light soils. Spartan is more active at pH above 7.0, so use reduced rates on high pH soil.

These and other labels can be downloaded from the internet at CDMS.net.

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