Orchard Floor Management: Herbicide Spray Tables

Pre-Emergent

Crop	Weeds Treated	Brand (ingredient)	Remarks
ALL	annual grasses and listed broadleaves	Alion (indaziflam)	Apply to dry soil and wait 48 hours before irrigation. Irrigation or rainfall should be received within 21 days following application.
Apple, pear, cherry	annual and perennial grasses and broadleaves	Casoron 4G (dichlobenil)	Apply Nov. to March when soil temp is below 45˚ F. Rain/irrigation is needed for activation; shallow incorporation recommended.
ALL	annual broadleaves and suppression of grasses	Chateau SW (flumioxazin)	Limited to 24 oz per year. Moisture is necessary to activate pre-emergence applications. Apple: apply only between harvest and pink stage. Stone fruit and pear: apply only between harvest and bud break.
ALL	annual broadleaves and suppression of grasses	Goal 2XL (oxyfluorfen)	Do not apply between bud swell and harvest (dormant application only).
Apple, pear, peach	annual grasses and broadleaves	Karmex DF (diuron)	Do not treat trees grafted on full dwarf rootstocks. Maximum 1 application/year.
ALL	annual and perennial grasses and listed broadleaves	Kerb 50-WR (pronamide)	Apply as post-harvest application when temperatures are below 55˚ F. Rain or irrigation required to activate. Maximum 1 application/year.
ALL	annual grasses and broadleaves	Matrix SG (rimsulfuron)	Weeds are controlled 60-90 days after application. If weeds are present at application, a labeled burn down herbicide such as glyphosate, or paraquat, will improve control. Do not use in mix water above 8.0 pH. Best results when soil is moist at the time of application and 0.5 inch rainfall occurs within 2 weeks of treatment.
Apple, pear, tart cherry	annual grasses and broadleaves	Princep 4L (simazine)	One application per year. Do not apply to gravelly or sandy soil. In Idaho it is registered for all fruit tree crops.
Apple, peach	annual grasses and broadleaves	Sinbar 80 WP (terbacil)	Maximum rate is 1 lb per year. Can be used on non-bearing pear, cherry, apricot, and plum.
ALL	annual grasses and broadleaves	Solicam DF* (norflurazon)	Apply from fall to early spring. Rainfall or irrigation of 0.5 inch is necessary for activation.
ALL	annual grasses and listed broadleaves	Surflan AS (oryzalin)	Rainfall or irrigation to 0.5 inch required for activation.

Post-Emergent

Crop	Weeds Treated	Brand (ingredient)	Remarks
ALL	annual broadleaves; green suckers	Aim EC (carfentrazone)	Use anytime of the season, always with surfactant. Mix with glyphosate or paraquat for better control.
ALL	annual and some perennial broadleaves	Amine 4, Saber, others (2,4-D amine)	Do not apply during bloom or near irrigation times. Do not apply to bare ground. Maximum 2 applications per year and 75 days between applications.
ALL	annual broadleaves and suppression of grasses	Chateau SW (flumioxazin)	Apple: apply only between harvest and pink stage. Stone fruit and pear: apply only between harvest and bud break. Limited to 24 oz per year. Use with an adjuvant.
Stone fruits	listed annual and perennial grasses	Fusilade DX (fluazifop-P)	Always add non-ionic surfactant. Rainfast in 1 hour.
ALL	annuals and some perennial grasses and broadleaves	glyphosate	Rate depends on weed species and stage of growth. Does not provide residual control; can be mixed with labeled pre-emergence herbicides. Avoid contact with all tree parts.
ALL	most annual grasses and broadleaves and top kill of perennial weeds	Gramoxone SL^R (paraquat)	Repeat applications are necessary for sustained control. Always add non-ionic surfactant. Maximum 5 applications/year.
Pome fruits, peach	annual grasses and broadleaves	Karmex DF (diuron)	Pome fruits: apply March – May only. Do not treat trees grafted on full dwarf rootstocks. Maximum 1 application/year.
ALL but plum (plum is non-bearing application only)	annual and perennial grasses	Poast (sethoxydim)	Use with 1.25% oil. Do not mix with other herbicides. Do not apply within 1 hour of rainfall. Will not work on drought-stressed grasses.
ALL	annual and perennial grasses and broadleaves	Scythe (pelargonic acid)	Contact non-selective burn down control of a variety of weeds. Can be mixed with glyphosate.
Stone fruits	perennial broadleaves	Stinger (clopyralid)	Apply while weeds are generally small and actively growing. Do not exceed 2/3 pt/ac/year. Highly leachable in light soils.
ALL	annual grasses and listed broadleaves	Surflan (oryzalin)	Mix with glyphosate or paraquat. Rainfall or irrigation to 0.5 inch required for activation.

Non-Bearing

Crop	Weeds Treated	Brand (ingredient)	Remarks
ALL	annual broadleaves and suppression of grasses	Chateau WDG (flumioxazin)	Do not apply to trees established less than one year, unless protected with non-porous wraps.
ALL	listed annual and perennial grasses	Fusilade DX (fluazifop-P)	Always add non-ionic surfactant. Rainfast in 1 hour.
ALL	listed broadleaves	Gallery 75 (isoxaben)	Pre-emergence only. Only apply to settled soil with no cracks. Rainfall or irrigation of 0.5 inch required within 21 days of application.
ALL	annual and perennial grasses	Poast (sethoxydim)	Use with 1.25% oil. Do not mix with other herbicides. Do not apply within 1 hour of rainfall. Will not work on drought-stressed grasses. Peach, nectarine, and plum are very tolerant of Poast and it may be applied over the top of non-bearing trees.
ALL	annual grasses and listed broadleaves	Prowl 3.3 EC (pendimethalin)	Pre-emergence herbicide. Use before bud swell. Rain or irrigation required within 21 days of application.
ALL	annual grasses and broadleaves	Reglone (diquat)	Post-emergence herbicide. Complete coverage essential.
Apple, apricot, cherry, peach, pear, plum	annual grasses and broadleaves	Sinbar WDG (terbacil)	For non-bearing, newly-planted trees, make the first application after a significant rainfall or irrigation that will settle the soil around the base of the tree.
ALL	annual grasses and listed broadleaves	Snapshot 2.5 TG (isoxaben/trifluralin)	Pre-emergence herbicide; 0.5 inch rain or irrigation required within 3 days of application.