Phosphorus Deficiency
If crops shows phosphorus deficiency then apply 1st spray of 12 : 61 : 0 at 35 days after planting and 2nd spray at 45 days after planting
Plant parts affected
Lower leaves
Initial diagnosis:
The older leaves become dark bluish-green with purple or red tints.
Symptoms:
Purple or red discoloration occurs on the tips and margins of old leaves and then advances into interveinal tissues. The stem can also develop purple or red discoloration.
Damage type:
The stem becomes thin and short. Root development is adversely affected.
Take a picture of the disease and get a solution