- Due to feeding leaves become small and brittle.
- Population is high during summer and the pest is very much associated with the plant.
Select 5 pits at random from the plot. Assess the total population from 6 leaves from each pit( For this select 3rd to 8th leaves from the tip of a vine trailing on the pandal) and work out average per leaf. Less than 5 -Mild, 5-10 Moderate, >10 severe.