RUSSIAN OLIVE CONTROL: HERBICIDE APPLICATION TIMING AND METHODS
Agronomy & Pest Management
Ronald Patterson
Horticulture/Agriculture Educator
University of Idaho
Idaho Falls
Abstract
This field study is an extension of an earlier study on chemicals and application rates for control of Russian Olive (Eleagnus angustifolia). This study was undertaken to determine the effectiveness of chemical applications on Russian Olive throughout the year. Roundup (41% glyphosate), and 2,4-D (47.3% 2,4-Dichlorophenoxyactetic Acid) were applied, undiluted, using the frill cut method at a rate of 1 cc per inch of trunk diameter to single and multi-stemmed trees. The chemicals were applied to three different trees each month from November, 2006 through September, 2007. The results were compared against the control for the same chemicals achieved in a study conducted in October, 2005. As a general rule, the results with 2,4-D during the months of May, June, July, and September were comparable with the October 2005 treatment. For Roundup the results during the months of January, May, June, July, August, and September were exceptionally good. This study suggests that control with chemical application by the frill cut method on Russian Olive is best May through October.
Authors: Patterson, R.K., Worwood, D.E.
-
Patterson, R.K. Agriculture/4-HYouth Agent, Utah State University, Utah, 84501
-
Worwood, D.E. Agriculture/4-HYouth Agent, Utah State University, Emery County, Utah, 84513