After floating for 2 h, each disk was inoculated with 20
l
L
suspension of 4
9
10
4
mL sporangia. The closed plates
were incubated at 18
±
1
°
C with 16 h light per day. After
5–7 days of incubation, the area of the leaf disk occupied
with fungal mycelia and sporangia was recorded and
inhibition of late blight was calculated in comparison with
the control treatment. Five leaf disks were used for each
concentration