To protect fish and wildlife, do not clean spray equipment or dump excess spray 
material near lakes, streams, and ponds or otherwise contaminate such water. 
Burn empty bags or cardboard containers in the open or bury them. Crush and 
bury bottles or cans in which the chemicals were packaged. 
Spray Treatments 
The individual rose species vary in their susceptibility to 2,4-D and 2,4,5-T. 
For controlling Macartney, a 2,4-D spray is recommended, but for Cherokee rose, 
2,4,5-T is more effective. For multiflora, a spray containing equal parts of 2,4—D 
and 2,4,5-T is more efficient, and for Woods rose, 2,4,5-T is best. 
Low-—volatile esters or oil-soluble, water—emulsifiable amine formulations of 
these herbicides are mixed in water at concentrations that will deliver the recom- 
mended per—acre dosage of herbicides. The first season you make an original 
treatment and, if necessary a second one, as follows: 
ROSE SPECIES POUNDS PER ACRE OF HERBICIDE 
(Acid Equivalent) 
2,4—D 2.4 5—. Total 
Cherokee 0 2, 2 
Macartney 2 0 2 
Multiflora i 1 2 
Woods 0 2, 2 
A retreatment in succeeding years at one-half these rates should keep the roses 
under control. 
Water-soluble amine formulations may be used for Macartney or Cherokee roses, 
but the herbicide concentration in the spray should be doubled and the spray 
mixture must contain 10 percent kerosene, diesel oil, or some other oil and %4 
percent of dishwashing detergent on the basis of the total-spray volume. 
The concentration of herbicide in the spray depends on the amount of spray to 
be delivered per acre. For example, the dilution may be 2 pounds of chemical in 
the total volume—usually ranging from 5 to 100 gallons. 
The extent and age of the infestation determine the method of applying the spray. 
A low-pressure boom sprayer is efficient for treating a young or mowed infestation 
which will not obstruct movement of ground spraying equipment. When height and 
density of the rose clump make use of a boom sprayer impractical, the herbicides 
can be applied by airplane or helicopter or by using a handgun. 
Spraying in the spring or early summer when the rose plants have reached 
full leaf or have started to produce flower buds gives best control. Spraying dur- 
ir.g the flowering period is also very effective, provided soil moisture is adequate for 
growth of the canes. Caution: If crops grown on fields adjacent to the rose infesta- 
tion are susceptible to the herbicides, spraying will have to be done before the sus- 
ceptible crops are planted or after they are harvested. In general, spraying 
should not be done when the temperature is above 85° F., to avoid generation of 
vapors which could drift and injure valuable plants. 
In grassland infestations, best rose control is obtained if grazing is deferred 
during the period of lush growth. This gives the grass a better chance to compete 
with the roses. For establishing grasses quickly in rose—infested pastures, spring 
spraying is more effective than fall treatment. 
