Are they still online? The quality of your cowpeas is not very good. They are white and the cowpeas behind the picture still have a bit of a sharp tail. If it's not a problem with the species, it's a problem with fertilizer, water or pesticides. Try to remember not to water when the ground is too dry during the pod picking period, and not to apply nitrogen fertilizer excessively, and do not use hormones randomly. Now apply some balanced fertilizer, apply amino acid foliar fertilizer and brassinoids on the leaves to regulate and alleviate the problem. There are also some irregular white marks on the leaves in the picture, which are caused by the damage of leafminers. You can spray them together with cyromazine or cyromazine on the basis of amino acid foliar fertilizer and brassinoids.