- Aphids are seen in colonies on the lower surface of leaves.
- Due to their feeding the leaves become highly crinkled and the plants become weak.
- They transmit mosaic virus.
Select 5 pits at random from the plot. Assess the total number of adults and nymphs 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 the average per leaf. Less than 5 -Mild,5-10 Moderate >10 severe.