Vol. 12, Issue 11 (2023)

Author(s):
Ajith CR, Ashtaputre SA and Rao MSL

Abstract:
Sunflower (Helianthus annuus L.) annual, herbaceous oilseed crop grown in tropical, sub-tropical and warm temperate regions. Leaf blight of sunflower caused by Alternaria helianthi (Hansf.) Tubaki and Nishihara is the major disease causing significant seed and oil yield loss. An intensive roving survey was conducted to know the severity of leaf blight of sunflower, in different areas of northern Karnataka namely Gadag, Bagalkote, Belagavi, Vijayapura, Bellary and Haveri during Kharif- 2022 and Rabi- 2022-23. During Kharif season, Mundaragi and Sindagi taluka of Gadag and Vijayapura districts, respectively recorded highest and lowest mean disease severity of 55.84 and 20.76 per cent, respectively, while during rabi, Bellary taluka of Bellary and Raibhag taluka of Belagavi district had highest and lowest leaf blight severity of 18.01 and 9.02 per cent, respectively. Among districts, Gadag and Vijayapura had highest mean leaf blight severity (51.28 and 16.01%, respectively) during kharif and rabi seasons, respectively.