2.6 Reduction of anthracnose lesion development
Mangoes, cv. Nam Dok Mai, were washed
in distilled water and left to dry. Cell suspension of
I. orientalis was prepared from 4-day-old PDA
culture at concentration of 108 cells/mL. The
mangoes were then immersed in the yeast cell
suspension for 40 min. For the control treatment,
mangoes were immersed in distilled water for the
same period of time. There were three replicates
each with twenty fruits arranged in RCBD. Since
this study paid attention on postharvest development
of anthracnose after quescent infection broke
out, there was no artificial inoculation. Hence, the
disease that developed on mangoes was caused by
natural infections. The mangoes were placed in
plastic baskets and covered with newspapers. After
fifteen days of incubation at room temperature,
lesion development was assessed using the
following scores: 0 = no disease; 1 = tiny lesion
(pin-headed size) developed, 2-3 lesions per fruit;
2 = 3-4 lesions of 3 to 4–mm diameter size were
found and the damaged area was less than 5 % on
the fruit; 3 = 5-12% of damaged area found on the
fruit; 4 = 13-25% of damaged area found on the
fruit; 5 = 26-50% of damaged area found on the
fruit; 6 = more than 50% of damaged area found
on the fruit.