Table 1. Virulence/avirulence of 38 powdery mildew isolates (across the top) derived from cleistothecia collected in Warsaw, Virginia, in 2001.

CG1 CG3 CG4 CG5 CG6 CG7 CG8 CG9 CG10 CG11 CG12 CG13 CG14 CG16
 Axminster Pm1 R R R R R R R R R R R R R R
 Ulka Pm2 M R S R RM S RM S S R S R R S
 Asosan Pm3a M S S M M S M S S S S S S S
 Chul Pm3b RM S R R R R RS S R S R R R M
 Sonora Pm3c RM S M M M S RS S S S S S R RM
 Yuma Pm4a R S S M M M M S S R S R R R
 Ronos Pm4b R M R RM R RM R M R R R R R RS
 Hope Pm5 M S S S S S S S S S S S RM S
 C747 Pm6 RM S S S M S S S S S S S S S
 Transec Pm7 M S S S S S S S S S S S S S
 Kavkaz Pm8 S S RM M S S M S RS S S RS RM S
 Amigo Pm17 R RM R R RM R M R RS R R RM R R
 MI Amber M S S S S S S S S RM S S RM S
 Chancellor M S S S S S S S S S S S RM S
CG17 CG18 CG19 CG20 CG21 CG22 CG23 CG24 CG25 CG26 CG27 CG28 CG29 CG30
 Axminster Pm1 R R R R R R R RM R R R R R R
 Ulka Pm2 S R S S S M S S R RM S S RM M
 Asosan Pm3a S S S S S S S S S S S R S S
 Chul Pm3b S M R R R R R R S S S S S S
 Sonora Pm3c S S S M M M M S S S S R S S
 Yuma Pm4a M S M M M M S S S S S S S R
 Ronos Pm4b R R R R R R R RM R R M RS R M
 Hope Pm5 S M S M S M S S S S S R S S
 C747 Pm6 S M S S S S S S S M S S S S
 Transec Pm7 S S S S S S S S S S S S S S
 Kavkaz Pm8 S RM S RM S M M S S M S S S S
 Amigo Pm17 R R R R RM RM RM RM R R R R R R
 MI Amber S M S S S M S S S S S RS S S
 Chancellor S S S S RS S S S S S S S S S
CG31 CG33 CG34 CG35 CG36 CG37 CG38 CG39 CG40 CG42
 Axminster Pm1 R R R R R R R R RM R
 Ulka Pm2 M R R S S S RM R R R
 Asosan Pm3a S R R S S S S S S S
 Chul Pm3b M R R R R R S S S S
 Sonora Pm3c S S S S S S S S S S
 Yuma Pm4a R S R S S S M S S S
 Ronos Pm4b R R R R R RM RM R R RM
 Hope Pm5 S S S S S S S S S S
 C747 Pm6 S S S S S S S S S S
 Transec Pm7 S S S S S S S S S S
 Kavkaz Pm8 S S S S S S S S RS S
 Amigo Pm17 R R R RS R R R R R R
 MI Amber S S S S S S S S S S
 Chancellor RM S S S S S S S S S