Disease assessment for root rot symptoms was recorded 45 days
after bioagent inoculation and severity index of tomato root rot was
determined in linear scale from 0 to 4, as follows: 0 ¼ Healthy roots,
1 ¼1/3 secondary roots do not exist, 2 ¼ 3/4 secondary roots do not
exist, 3 ¼ primary roots exist, secondary roots do not exist, and
4 ¼ Primary roots do not exist