At R4, the plant reaches the full pod stage, pod growth is rapid and seed development begins. This is the most crucial stage for seed yield. In hot, dry conditions, consider irrigation if available. The pods are filling at a maximum rate, making the plant most susceptible to stresses and causing it to move nutrients from other areas weakening it to invasion by diseases through the roots and foliage. Scenescence is about to begin and can be hastened by stress.
Pests to Scout For:
Use this information as a guide and it should not be the only factor in making decisions.