- Both the adults and nymphs suck the juice from seeds and as a result the seeds shrink and shrivel with in the pods.
- The attacked seeds become discoloured.
- The skin surface of the attacked pods presents a wrinkled appearance.
- When the attack becomes severe many pods show uneven development causing huge economic loss.
Select 3 rows at random. From each row select 5 plants at random. Assess the population of bugs. Take the average/ plant. One mild , 2 moderate, more than 2 severe.