Pears

Pears – Year of Planting

Time of Application	Weeds	Material	Rate		Notes
Time of Application	Weeds	Material	Hectare	Acre	Notes
After soil settled; prior to weed emergence	Mainly annual broadleaf weeds	Simazine – choose; Simazine 80W or Princep Nine-T	1.25 kg 1.1 kg	0.56 kg 0.5 kg	Apply to moist soil &/or irrigate after application.
	Annual grasses & some broadleaf weeds	Devrinol	9 kg	3.8 kg	Sensitive to UV light; apply to moist soil & irrigate after application.
	Annual broadleaf weeds & grasses	Simazine –choose : Simazine 80W or Princep Nine-T + Devrinol	1.25 kg 1.1 kg 9 kg	0.56 kg 0.5 kg 3.8 kg	As above.
	Annual grasses & some broadleaf weeds	Dual Magnum	1.25-1.75 L	0.5-0.7 L	Avoid contact with trunk & leaves.Apply to moist soil & irrigate after application.
	Annual broadleaf weeds & grasses	Simazine-choose: Simazine 80W or Princep Nine-T + Dual Magnum	1.25 kg 1.1 kg 1.25-1.75 L	0.56 kg 0.5 kg 0.5-0.7 L	As above.
30 days or more after planting	Annual broadleaf weeds & grasses	Casoron G4	110 kg	45 L	Must be irrigated into soil immediately after application. Refer to text in Section 9.
Emerged weeds less than 5 cm	Annual broadleaf weeds	Basagran	2.25 L	0.9 L	Direct application to avoid crop. Requires a surfactant.
Emerged weeds in 2-4 leaf stage	Annual grasses	Venture L	1 L	0.4 L	Does not control annual bluegrass.
Rapid growth 3-5 leaf stage	Quackgrass	Venture L	2 L	0.8 L	Provides suppression only.
Throughout season-vegetation 10 cm or less	Annual & perennial broadleaf weeds & grasses	Gramoxone N	5.5 L	2.2 L	Avoid contact with foliage & green bark of trees.

Pears – Bearing

Time of Application	Weeds	Material	Rate		Notes
Time of Application	Weeds	Material	Hectare	Acre	Notes
Late fall, late winter or early spring	Annual & perennial broadleaf weeds & grasses	Casoron G4	110-175 kg	45-70 kg	For late winter/early spring application, apply just prior to or during rainfall. See text Section 9. Lower rates for annuals.
Late fall, late winter or early spring	Annual broadleaf weeds & selected grasses	Chateau	280-420 g	112-168 g	Reguires moisture to activate. Apply before bud break. Check label for soil type and rate combinations.
Late winter or early spring	Selected annual grasses & broadleaf weeds	Alion	375 mL	152 mL	Apply to only once per season before weed seeds germinate. Apply to moist soil and/or irrigate after application.
	Annual broadleaf weeds & grasses	Simazine-choose: Simazine 80W or Princep Nine-T	1.9-3.8 kg 1.7-3.3 kg	0.8-1.5 kg 0.7-1.4 kg	Apply to moist soil. High rates only on well established trees on heavier soils.
	Annual grasses & some broadleaf weeds	Dual Magnum	1.25-1.75 L	0.5-0.7 L	Avoid contact with trunk & leaves. Apply to moist soil & irrigate after application.
	Annual grasses & some broadleaf weeds	devrinol	9 kg	3.6 kg	Sensitive to UV light. Apply just prior to or during rainfall.
	Annual grasses & broadleaf weeds	Sencor 500	1.5 L	0.6 g	Calibrate well to ensure crop safety.
Mid spring¹	Annual & perennial broadleaf weeds & grasses 10 cm or less	Gramoxone² N	5.5 L	2.2 L	Avoid contacting foliage. Use high spray volume.
	Quackgrass	Venture l	2 L	0.8 L	Provides suppression only.
	Annual grasses	Venture l	1L	0.4L	Does not control annual bluegrass.
	Annual broadleaf weeds & grasses	glyphosate² Various products available³	2.25-3.5 L	0.9-1.4 L	Avoid contacting foliage & green bark.
	Perennial broadleaf weeds & grasses	glyphosate² Various products available³	4.5-7 L	1.8-2.8 L	Avoid contacting foliage & green bark.
	Difficult-to-control perennials e.g. field bindweed	glyphosate² Various products available³	10-12 L	4-4.8 L	Avoid contacting foliage & green bark.
	Annual broadleaf weeds & grasses & some perennials	Ignite²	3-5 L	1.3-2.1 L	Avoid contacting foliage & green bark.
Emerged grasses (1-6 leaf stage)	Annual grasses, volunteer cereals, quackgrass	Poast Ultra	320-470 mL (1.1 L for quackgrass)	130-190 mL (445 mL for quackgrass)	Apply in a band under trees. Use Merge Adjuvant at 1% v/v in 100-200 water/ha.

¹ GRAMOXONE, glyphosate and IGNITE treatments can be repeated as required during the season respecting days-before-harvest limitations.

² GRAMOXONE, glyphosate and IGNITE can be followed by simazine or DEVRINOL applications for residual control.

³ Glyphosate is available in several formulations of different salts. Different salts may affect activity. Be sure to check the label for amount of active ingredient.

Questions, comments, or concerns can be emailed to [email protected].