seeding of this variety in 1969. Among the varieties, Saratoga and Blair yielded 

 well, but were not significantly better than most entries. 



As shown in Table 6, the experimental synthetics seemed appreciably more 

 resistant to brown leaf spot than most of the varieties. The syn two generation 

 seemed to be about as resistant as the syn one. Most currently used varieties such 

 as Saratoga are fairly susceptible to this disease. 



Test II (Table 7) 



Good establishment was obtained in this trial, and reasonably good yields 

 were obtained over the four year period. The stand was maintained well with 

 this management, and averaged about 80% bromegrass in 1975. Relatively high 

 infection with brown leaf spot occurred in 1972, averaging about 3.2 on the 

 experimental synthetics and about 4.2 on the varieties. Polar and Carlton 

 appeared to be more susceptible than most other entries. 



Relatively few significant differences in yield were obtained over the 

 four-year period. Blair, Fox, Saratoga and the five-clone synthetic were 

 somewhat higher than most other entries, but none of these differed 

 significantly in yield. Polar and Carlton yielded significantly less than most other 

 entries. No significant differences were obtained between syn 1 and later 

 generations of synthesis. 



Test III (Table 8) 



Although a good stand was obtained originally in these plots, and this was 

 maintained well during the three harvest seasons, forage yields were quite low in 

 this trial. In June 1974 very poor top growth was obtained with relatively little 

 heading. It was observed that Polar, selected in Alaska, was particularly slow in 

 growth in the spring. It is not quite clear why, despite a good fertilization 

 program, that vigor and yield were so low on this site, especially in 1974 and 

 1975. 



Relatively few significant differences in yield were obtained among entries for 

 the poor performance of Polar and Magna. Slightly higher yields were obtained 

 by Saratoga, Baylor, and the Wisconsin synthetic B-7, but these did not differ 

 significantly from three or four other entries. 



In June, 1976, Saratoga and Polar were most susceptible to a medium 

 infection with brown leaf spot (average rating - 3.8) whereas the other entries 

 ranged from 1.8 (B-7) to 2,8 (Magna). 



