hi
Hi
It's a fungal disease. Try Cultural control by reducing the density of seedlings (uproot the infected plants), restricting watering and modifying the seedling environment so that it is less suitable for disease development are valuable control practices. Yet, diseases of seedlings and young trees sown in extensive plantings for forage production will be difficult and costly to control by normal nursery practices. Seed treatments, especially with systemic fungicides which may be incorporated in pellets with rhizobium, may be the major viable option in the field.
For more details, contact neaest Agril. Univ.'s Plant Pathology Department.
Regds