Table 1 presents information about the labeled herbicides deemed most useful for control of multiflora rose. Some are labeled for applications by more than one method at different times of the year. This table indicates which herbicides are labeled for use within pastures, the recommended application interval for Ohio, and use rates. Times of treatment may be somewhat delayed in states with climates colder than Ohio. Also, because rose often is not the only woody species needing to be controlled, the table lists other species tolerant of herbicides at the rates listed for multiflora rose.
Table 1 (Adobe Acrobat .pdf file format) This is a to page table. For optimum viewing of Table 1, print the two pages and lay them side by side to create an 11" by 17" spread.
The challenge is to select the most appropriate herbicides to safely treat multiflora found in different natural settings on a property. This decision is also influenced by product label restrictions, cost, current and future expected land use, and site characteristics. Consider using the following herbicides for the listed situations:
Applicators are expected to read, understand, and follow the directions on labels and to adhere to worker protection standards listed on the label. Wearing proper safety equipment and clothing, in addition to helping ensure safe application, conveys concern for the environment to the general public.
The recommendations presented in this publication are based on field research conducted by the Ohio State University since 1971, as well as applicable research from other states. In this research, the evaluation of plant kill 8 to 17 months after application has been emphasized, rather than simply the degree of short-term control of topgrowth.
Many labeled herbicides do not consistently result in total plant kill, and you can often obtain the best results by combining herbicidal and mechanical control methods.
Herbicides tend to kill rose plants from the peripheral roots inward toward the crown. Thus, subsequent mechanical mowing or pulling of treated plants often eliminates any remaining live plant parts and hastens re-establishment of grass cover. Because dead topgrowth also protects emerging rose seedlings, promptly removing it facilitates future field maintenance.
Comparative costs of different herbicides are best evaluated by determining the cost for the amount of each herbicide needed to treat a solid acre equivalent. These figures can then be multiplied by average percentage of acreage infested to estimate actual treatment costs for a property. Generally, pelleted products or herbicides applied undiluted to the soil are most costly.
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