Score | Damage symptoms/description |
1 | Few pinholes on 1 - 2 older leaves |
2 | Small circular lesions and pinholes present on whorl leaves |
3 | Several shot-hole injuries on a few leaves (<5 leaves) and small circular hole damage to leaves |
4 | Several shot-hole injuries on several leaves (6 - 8 leaves) or small lesions/pinholes, small circular lesions, and a few small elongated (rectangular-shaped) lesions of up to 1.3 cm in length present on whorl and furl leaves |
5 | Elongated lesions (>2.5 cm long) on 8 - 10 leaves, plus a few small- to mid-sized uniform to irregular-shaped holes (basement membrane consumed) eaten from the whorl and/or furl leaves |
6 | Several large elongated lesions are present on several whorl and furl leaves and/or several large uniform to irregular-shaped holes eaten from furl and whorl leaves |
7 | Many elongated lesions of all sizes are present on several whorl and furl leaves plus several large uniform to irregular-shaped holes eaten from the whorl and furl leaves |
8 | Many elongated lesions of all sizes are present on most whorl and furl leaves plus many mid to large-sized uniform to irregular-shaped holes eaten from the whorl and furl leaves |
9 | Whorl and furl leaves were almost destroyed and plants died as a result of extensive foliar damage |