Weed Control and Cane Suppression for Mechanical Harvesting

carfentrazone (Aim EC)

Raspberry, blackberry, and boysenberry only

Rate 0.03 to 0.1 lb ai/A (2.0 to 6.4 fl oz/A Aim EC); consult labels

Time Apply when primocanes are about 6 inches tall. In alternate-year blackberries, do not apply to new canes during nonbearing year. For broadcast application use up to 2 fl oz/A product.

Remarks Apply as directed application in band to bottom 18 inches of canes. Apply in at least 40 gal/A water. Can reapply at 14- to 21-day intervals. Follow calculations for banded applications. Minimize drift or spotting of crop foliage with large-orifice nozzles and low pressure while directing spray toward base of canes. Preharvest interval is 15 days.

Caution Do not treat caneberries stressed by drought, poor growth, or disease. Do not exceed 0.4 lb ai/A (25.6 oz/A) per season.

Site of action Group 14: protoporphyrinogen oxidase inhibitor

Chemical family Triazinone

oxyfluorfen (Goal 2XL)

Rate Raspberry: 0.2 to 0.75 lb ai/A (0.75 to 3 pints/A Goal 2XL broadcast); Blackberry: 0.4 to 0.8 lb ai/A (1.6 to 3.2 pints/A Goal 2XL broadcast or generic equivalent); Blackberry (alternate-year blackberries during nonbearing year): 0.5 to 1 lb ai/A (2 to 4 pints/A Goal 2XL broadcast rate or generic equivalent)

Time Apply when primocanes have emerged 4 to 6 inches.

Remarks Use a minimum spray volume of 50 gal/A broadcast (see label for conversion from broadcast to banded rate). Adding 2 pints 80% active nonionic surfactant per 100 gal spray solution is suggested. Primocane suppression may last 3 to 6 weeks; adjust timing, rate, and number of applications according to plant vigor and desired degree of primocane suppression. Cool, overcast conditions may enhance activity or potential injury to the crop. Preharvest interval is 15 days for blackberries and 50 days for raspberries.

Caution Do not exceed 5 pints/A broadcast per season for raspberry; 6 pints for blackberry; and 8 pints for alternate-year blackberries. For alternate-year blackberries, apply after desired number of canes have been bundled and trained to trellis wire; otherwise, next year's crop potential may be harmed and control of basal growth will be diminished. A second treatment may be required to suppress new growth at base of plant.

Site of action Group 14: protoporphyrinogen oxidase inhibitor

Chemical family Diphenylether

pelargonic acid (Scythe)

Rate For annual weeds, a 3 to 5% solution; for burndown or sucker control, a 5 to 7% solution

Time Apply in 75 to 200 gal/A water broadcast when temperatures exceed 45°F. Apply to weeds or primocanes shorter than 6 inches.

Remarks Cool weather after treatment may slow activity and delay or reduce visible effects. Adding a surfactant may enhance control. Preharvest interval is 1 day.

Site of action Unknown

Chemical family Unknown