20 



Table 2. Number and percent of heads of Cirsium longistylum 

 infested by Rhinocyllus conicus . 



PLOT 

 # 



PLANT 



NUMBER OF HEADS 

 ON PLANT 



NUMBER OF 

 INFESTED HEADS 



PERCENT OF 

 HEADS INFESTED 



1 (Lower Russian Creek) 



6 



33 



10 



24 



15 



4 



30 



8 



23 



13 



67X 

 90X 

 80X 

 95X 

 86X 



2 (Deadman Creek) 



11 

 13 

 15 

 10 

 19 



11 

 13 

 15 

 10 

 19 



100X 

 100X 

 100X 

 100X 

 100X 



3 (O'Brien Park) 



9 



6 



10 



17 



21 



22X 



OX 



10X 



12X 



43X 



4 (Kings Hill) 



15 



15 



9 



11 



15 



1 

 5 

 7 

 2 

 3 



6X 



33X 



78X 



18X 



20X 



5 (Neihart) 



22 



20 

 14 

 10 

 16 



10 

 13 

 11 



3 

 10 



45X 

 65X 

 78X 

 30X 

 62X 



Totals 



25 



366 



225 AVERAGE PERCENT 58X 

 OF HEAD 

 INFESTATION 



