Evaluation of integrated disease management against major diseases of sunflower (Helianthus annuus L.)
EVALUATION OF INTEGRATED DISEASE MANAGEMENT AGAINST MAJOR DISEASES OF SUNFLOWER
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Authors
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A SANGEETHA
Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur-636 119, Tamil Nadu
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K SUBRAHMANIYAN
Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur-636 119, Tamil Nadu
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A MAHALINGAM
Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur-636 119, Tamil Nadu
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G GAYATHRY
Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur-636 119, Tamil Nadu
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D JANAKI
Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur-636 119, Tamil Nadu
Keywords:
Sunflower, Alternaria leaf spot, Necrosis, Powdery mildew, IDMAbstract
Integrated disease management strategies favours wider scope for three major diseases such as necrosis, Alternaria leafspot and Powdery mildew that are causing economic losses in sunflower cultivation with reference to Tamil Nadu. For the management of these diseases in an integrated way, four different treatments were imposed on sunflower through a field experiment. Among the treatments tested T1: Seed treatment with salicylic acid @100 ppm; neem oil @ 3% at 30 DAS; foliar spray of zineb (68%) + hexaconazole (4%) WP @ 25 g/ 10 lit at 45 and 60 DAS was found to be significantly effective by recording the maximum seed germination (98.30%), minimum incidence of sunflower necrosis disease (0.81%), Alternaria leaf blight (4.6 PDI) and powdery mildew (3.82 PDI) with maximum yield of 1940 kg/ha and benefit cost ratio ( 2.84). Minimum seed germination of 90.08 % was recorded in Control recorded and maximum incidence of sunflower necrosis disease (5.15 %), Alternaria leaf blight (16.2 PDI) and powdery mildew (17.2 PDI) with minimum yield of 1003 kg/ha and BC ratio (0.96).
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References
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