Table 2 Disease severity index of Potato and Sunflower Wilt.

From: Identification and comparison of biological characteristics and pathogenicity of different mating types of V. dahliae isolated from potato and sunflower

Disease index scale

Potato

Sunflower

Value

Symptoms

Disease index scale

Value

Symptoms

1

0

Healthy plants

1

0

Healthy plants

2

1

up to 40% chlorosis and 1–20% necrosis

2

1

25% foliar chlorosis and stunting

3

2

up to 65% chlorosis and 21–35% necrosis

3

2

26–50% foliar chlorosis and stunting

4

3

100% chlorosis, 36–70% necrosis

4

3

51–75% foliar chlorosis and stunting

5

4

100% chlorosis, 71–100% necrosis

5

4

75%–100% severe leaf chlorosis and stunting along with plants death