Nitrogen

Deficiency Symptoms :

Chlorosis of young leaves & old leaves (early stages), Marginal Chlorosis, Whole leaf Chlorosis Yellow-Pale green Death of whole leaf, Chlorosis followed by death.  Thin stems, spindly stems pale green stems are seen fewer or smaller mature heads. Sunflower responds to 30-80 kg N/ha depending upon soil moisture status.

Foliar spray of 1% Urea at weekly intervals.