Spot Treatments with Selective Equipment

glyphosate (numerous products)

Rate Wiper: 33% solution

Time Apply with selective wiper when weeds are at least 6 inches taller than crop but after active growth stage of conifer, when buds are mature.

Remarks Mix 1 gal product in 2 gal water. Avoid contact with desirable vegetation. Inhibits production of three amino acids and protein synthesis.

Caution Do not broadcast over conifers in nurseries. Although not explicit on the label, this use is included under industrial uses.

Site of action Group 9: inhibits EPSP synthase

Chemical family None generally accepted

glyphosate (several products)

Rate Consult label for rate

Remarks Spot treatments applied with a paint brush or similar device to curly dock, Canada thistle, and horsetail have proven satisfactory if extreme care is taken to avoid contact with conifer seedlings. (See comments above.)

Site of action Group 9: inhibits EPSP synthase

Chemical family None generally accepted

oxyfluorfen (Goal 2XL)

Rate 0.25 to 0.5 lb ai/a (1 to 2 pints/a Goal 2XL)

Time Apply in at least 20 gal water at least 5 weeks after emergence or bud break, or while trees are dormant and weeds are less than 4 inches tall.

Remarks Two or three applications may be needed to control some weeds, especially if they have four or more leaves. Allow 24 hours after application for evidence of contact activity before irrigation. Acts as a contact herbicide.

Site of action Group 14: protoporphyrinogen oxidase inhibitor

Chemical family Diphenylether