Herbicide Recommendations for Perennial Weed Control: Postemergence Broadleaf Herbicides

Pub 75: Guide to Weed Control > Roadsides and Non-Crop Areas > Herbicide Recommendations for Perennial Weed Control: Postemergence Broadleaf Herbicides

Excerpt from 2008 Chapter 18, Publication 75, Guide to Weed Control, Order this publication

2,4-D
Amitrol
Diphenoprop, Desormone, Estaprop or Dichlorprop
Garlon 4
Telar
Tordon 101
Transline
Vanquish or Oracle
Roadsides & Brush Control Herbicide Rating Tables
- Susceptibility of Woody Plants to Various Herbicides & Mixtures as Foliage Sprays (Table 18-1 ) (PDF 51k)
- Classification of Weeds According to Response to Various Foliage Sprays (Table 18-2 ) (PDF 62k)
Other Perennial Weed Control Recommendations

**2,4-D**
Trade Name	2,4-D	or 2,4-D	or 2,4-D
Active Ingredient	2,4-D	or 2,4-D	or 2,4-D
Formulation	470 g/L	564 g/L	660 g/L
Rate per hectare (active)	1 to 2 kg/ha	1 to 2 kg/ha	1 to 2 kg/ha
Rate per hectare (product)	2 to 4.25 L/ha	1.77 to 3.55 L/ha	1.5 to 3 L/ha
Rate per acre (product)	0.85 to 1.7 L/ac	0.71 to 1.42 L/ha	0.6 to 1.2 L/ac

Precautions

Apply in 1000 L/ha water (400 L/ac).
See Table 19-2 for list of weed susceptibilities to 2,4-D and related chemicals.

Precautions

For milkweed control.
Apply in 500-1000 L/ha water (200-400 L/ac) after most shoots have emerged but before flowering.

**Diphenoprop or Desormone or Estaprop or Dichlorprop or Turboprop 600**
Trade Name	Diphenoprop BK 700	or Desormone	or Estaprop	or Dichlorprop D	or Turboprop 600
Active Ingredient	dichlorprop / 2,4-D	or dichlorprop / 2,4-D	or dichlorprop / 2,4-D	or dichlorprop / 2,4-D	or dichlorprop / 2,4-D
Formulation	679 g/L	680 g/L	582 g/L	582 g/L	582 g/L
Rate per hectare (active)	2.375 kg/ha	2.375 kg/ha	2.375 kg/ha	2.375 kg/ha	2.375 kg/ha
Rate per hectare (product)	3.5 L/ha	3.5 L/ha	4 L/ha	4 L/ha	4 L/ha
Rate per acre (product)	1.4 L/ac	1.4 L/ac	1.6 L/ac	1.6 L/ac	1.6 L/ac

Precautions

Apply as a low-volatile ester in 200-600 L/ha water (80-240 L/ac) during the month of May or in early fall.

Precautions

Precautions

Canada thistle, dandelion, and field horsetail. Add a surfactant to improve control.

Precautions

For Canada thistle, sweet and red clover, wild carrot, common ragweed, goldenrod, dock, plantain, prickly lettuce, burdock, fleabane and vetch.
Apply in 200 L/ha of water as a constant volume foliar application.
Apply when weeds are actively growing.
Do not allow drift on susceptible vegetation such as beans, peas, vegetable crops, gardens or shelterbelts.
A permit is required for purchase and use.

Precautions

For coltsfoot, spotted knapweed, ragweed, Canada thistle, ox-eye daisy, tufted vetch, scentless chamomile and clover.
Treat when weeds are young and actively growing.
For coltsfoot, treatments should be performed prior to August.
Apply as a broadcast in 200 L/ha water (80 L/ac) or in sufficient water to ensure thorough coverage of target vegetation.

Precautions

For field bindweed, leafy spurge and cypress spurge.
Apply sprays in mid June or during flowering, in 100-200 L/ha water (40-80 L/ac). Canada thistle or perennial sow-thistle.
Apply spray in late spring just prior to flowering, or apply to regrowth escaping other treatments, in summer or fall.