Preplant and Postharvest Weed Control: Spot Treatment with Hand-Held Equipment For Selective Weed Control

Spot Treatments and Postharvest Weed Control: Spot Treatment with Hand-Held Equipment for Selective Weed Control

Excerpt from 2010-11 Chapter 6, Publication 75, Guide to Weed Control, Order this publication

Amitrol 240
Glyphosate
Preplant and Postharvest Weed Control Tables
- Non-Selective Herbicides Available for Preplant Site Preparation (Table 6-1) (PDF - 55 kb)
- Preplant Herbicide Weed Control Ratings (Table 6-2) (PDF - 49 kb)
- Postharvest Weed Control (Table 6-3) (PDF - 47 kb)
Other Special Methods of Weed Control

Precautions

Use ONLY for non-crop land and pasture.
Thoroughly wet all leaves and stems of weeds. Repeat applications when new growth appears.
Apply to Canada thistle and sow-thistle at early bud to bloom, quackgrass and horsetail at 10-15 cm, dandelion when young, toadflax and hoary cress at advanced rosette, milkweed in early summer, poison ivy when fully leafed.
Do NOT allow livestock to eat treated vegetation. Keep livestock off treated area until weeds are dead and new growth has emerged.

**Glyphosate**
Trade Name	glyphosate	or glyphosate	or glyphosate	or glyphosate	or glyphosate
Active Ingredient	glyphosate*	or glyphosate	or glyphosate	or glyphosate	or glyphosate
Formulation	360 g/L	450 g/L	480 g/L	500 g/L	540 g/L
Rate per volume (active)	0.36 to 0.72 kg/100 L	0.36 to 0.72 kg/100 L	0.36 to 0.72 kg/100 L	0.36 to 0.72 kg/100 L	0.36 to 0.72 kg/100 L
Rate per volume (product)	1 L to 2 L/100 L	0.8 to 1.6 L/100 L	0.75 to 1.5 L/100 L	0.72-1.44 L/100 L	0.67 - 1.34 L/100 L

Precautions

For actively growing weeds. Direct spray to avoid desirable vegetation.
Allow 5-7 days translocation time after application before doing any mowing or tillage when conditions are good. If cool temperatures follow application, allow additional time for translocation to be completed before disturbing treated weeds.
Canada thistle and sow-thistle should be at least in early bud, milkweed at bud, bindweed at full flower, and dogbane past full bloom, and quackgrass with 3-4 new leaves for best results.