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Table 18-1. Susceptibility of Woody Plants to Various Herbicides and Mixtures as Foliage Sprays

Author: OMAFRA Staff
Creation Date: 25 November 2002
Last Reviewed: 25 June 2008

Pub 75: Guide to Weed Control > Roadsides & Non-Crop Areas > Table 18-1. Susceptibility of Woody Plants to Various Herbicides and Mixtures as Foliage Sprays

Cover of Publication 75, Guide to Weed ControlExcerpt from 2008 Chapter 18, 2008 Publication 75, Guide to Weed Control, Order this publication

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Common Name
 2,4-D 2,4-D Dichlorprop
(1:1) 		2,4-D Dicamba
(2:1) 		Fosamine ammonium 2,4-D Picloram
(3.7:1) 		Triclopyr
alder
 S-I S S S S S
arborvitae
 R R S   S  
ash
 R S-I I-R S-I I-R S
I S   S S-I  
basswood
 R S S S S S
beech
 R   I S-I S S-I
birch
 S S S   S S
blackberry
 R   I-R S S-I S
blueberry
 S S I-R I S S-I
I-R   I-R   S S
cedar
 R I-R S   S  
cherry, black, red
 S-I S S S-I S S-I
cherry, choke
 S-I S S S S S
cranberry
 S          
S S-I S S-I S  
currants, wild
 R   S      
dogwood
 S-I S   S S S
elderberry
 S   S-I   S S
elm
 I S-I S S-I S S-I
fir, balsam
 R S-I S   S I-R
S S S   S S
hardhack, spirea
 I       S  
hawthorn
 I-R S S-I S S S
R       S  
hickory, black, shagbark
 R S-I S I   S
honeysuckle
 S-I S S   S  
ironwood
 R S-I S   S S
juniper
 R I-R S   S-I  
lilac
 I-R       S  
locust, black
 I       S  
locust, honey
 S-I       S S-I
maple, Manitoba
 S-I S S S-I S S
maple, red
 R I-R I-R S-I S S-I
maple, silver
 S-I       S S
maple, sugar
 R S-I I-R   S S
oak, red
 I I-R S I-R S-I S
oak, white
 I S-I S-I   S-I I
oak, bur
 R-I   S I-R S  
pine
 R S-I S I-R S I
plum, wild
 I S   S    
I S-I S I S S
poplar, aspen
 S S S   S S
R   S S   S
raspberry, wild
 R S I S   S
redbud rhododendron
 R       R S
rose, wild
 R I S S S S
sassafras
 S-I         S
sheep-laurel
 I   S   S-I S
spruce
 R I-R S   S-I R
S         S
sweet-fern
 I   S S-I    
viburnum
 R         S
walnut
 S-I       S  
willow
 S S S S S S

S - Susceptible. Adequate control obtained with one application.
I - Intermediate. Retreatment is usually need for adequate control.
R - Resistant. Two or more applications may not be adequate.

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