sunflower is being popularised on a large scale in TamilNadu and other states of India to icrease the natioonal oil production.Of several diseases.rust disease has gained importance in TamilNadu in rent years.Histopathology (Siddiqui.1972)and control of rust (Ramasamy and Sindha Mathar.1973)have been reported.The present study reports the varietal reaction of sunflower to rust disease under field conditions of infection.
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