Entomopathogenic Fungi: Oidium sp.
Entomopathogenic Fungi fiber grow on the leaf of flower carpel and young fruit. The white fine powder is inside the flower which makes it withers and falls. If it happens to the young fruit, it causes the crack thorn and brown peel. Then, the fruit is likely to fall because the fungus sucks the nutrients from the tree. The epiphytotic is found when the weather is dried and cool with the dew in the morning.
Prevention and Elimination
1. Use Kumark 400 cc. (usage rate is per 200 ltr. of water).