Date of this Version
Thesis (M.S.)--University of Nebraska--Lincoln, 1965. Department of Agronomy.
The objectives of this study were to determine the most effective herbicides and optimum dates of application to control musk thistle (Carduus nutans L.), and the kind of pasture and level of management which will prevent musk thistle establishment.
A smooth bromegrass pasture with a heavy infestation of musk thistle was treated with the following herbicides: 2,4-0 at 1, 1.5, and 2 lb./A; 2,4,5-T at 1 lb./A; 2,4-DB at 1, 1.5, and 2 lb./A; picloram at 0.25, 0.5, and 1 lb./A; and dicamba at 1, 1.5, and 2 lb./A. The experimental design was a split plot with 4 replications. Herbicides were applied in 20 gallons of water per acre on 4 dates: April 20, April 30, May 10, and June 1, with a bicycle sprayer. Plot size was 8 x 35 ft. Counts of musk thistle were made in 3 quadrats (2 x 4 ft.) per plot before treatment and in mid-summer.
Advisor: M. K. McCarty.