Rinse off excess inoculum with tap water as soon as possible. Cover plants with wet newspaper for 24 hr. Plants are rated as resistant or susceptible 7-14 days after inoculation. Susceptible plants have mottled yellow-green and green leaves, and may be stunted. They may show epinasty, downward bending of the petioles.
Resistant plants show no mottling.
If a slight amount of mottling is present, a resistant plant will grow.