46 Experiment Station Bulletin 363 



being grazed more than adjoining untreated areas. Other weeds, notablv 

 Avtemhirias or everlastings, rushes and sedges, were effectively destroved. 

 Some white clover either persisted or seeded in on all plots treated with 

 ammonium sulfamate. 



On June 28, plots were laid out and borax applied. Excellent control 

 was obtained by the application of 2 pounds per 100 square feet. The 

 soil was a heavy clay and fairly dry. Applications of 1 pound of borax 

 per 100 square feet at this time of year and under these conditions did 

 not give satisfactory control of buttercup. 



Yello-cv DeviPs Paintbrush or King Devil Considerable interest has 

 been centered in the control of this serious pasture and field weed. Pre- 

 liminary trial plots were established in a permanent pasture at Rollins- 

 ford . Ammonium sulfamate, borax, and sinox were each used at several 

 concentrations and at different times. A late June application of ammo- 

 nium sulfamate, at %e pound per gallon of water, gave excellent control 

 by destroying virtually all of the weed and providing conditions for the 

 almost complete return of grasses and clover during the summer. The 

 results with sinox indicated its possible use also in controlling the King- 

 Devil. 



Other Pasture Weeds. At various times, a variety of weed species 

 have been treated with the herbicides described. The results, while not 

 conclusive, do indicate a wider possible use of selected herbicides for 

 eliminating pasture weeds. 



A. R. HoDGDox, F. S. Prince 



Pasture Species 



During the year, some of the rod rows were discontinued due to the 

 heavy soil type and lack of labor for caring for the area. The remaining 

 rows are chiefly those of the uniform grass nursery which includes the 

 following: smooth brome grass, 8 strains; Kentucky bluegrass, 11 strains; 

 meadow fescue, 6 strains; orchard grass, 2 strains; and red fescue, 8 

 strains. In addition to the above there are a few scattered rows of vari- 

 ous species for observation. 



Green weights were noted from two harvests. Yields were general- 

 ly lower than in the 1943 season because of the two periods of extended 

 drouth in 1944. Yields of smooth brome grass averaged higrher than 

 meadow fescue. Second cuttings were much lower than the first ex- 

 cept in the case of orchard grass. 



L. J. HiGGiNs, P. T. Blood, F. S. Prince 



Improvement of Ladino Clover, Red Clover and 

 Timothy by Selection and Breeding 



Ladino Clover (Trifoliinn re pens). Twenty- four plants were se- 

 lected and numbered in the autumn of 1943. These represented original 

 Ladino parents and superior individual plants of the Fl, F2, and F3 gener- 

 ations of stock obtained by intercrossing large, wild, white clovers and 

 Ladino in the Fl generation and back crossing to Ladino in the F2 and 

 F3 generations. 



