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