Redvine is one of the more difficult to control. Because redvine does not lose its leaves with fall defoliation, the producer has an opportunity to make a herbicide application that might be absorbed through the foliage after harvest and before frost occurs. In our research program we are looking at application timing and sequential herbicide applications. We investigate the use of herbicides in the fall or after defoliation, preplant applications, and the use of various application techniques. During the growing season, this might involve applications with hooded sprayers, or the use of transgenic cotton varieties that might allow the application of herbicides that otherwise would injure cotton with direct application.
Visual evaluations estimate redvine foliage injury through the season.
Actual plant counts are made in the fall. These counts show the direction our treatments are moving. This gives an indication of actual infestation reduction or maintenance of the existing level or no influence with levels increasing either gradually or rapidly. There were several treatments showing some effectiveness. This experiment covered a period of time from an initial application in the fall of 1994 through the fall application of 1997.