Evaluation of fungicides for suppression of bended leaf and sheath blight, maydis and turcicum leaf blight of maize
Evaluation of fungicides for blight of maize
DOI:
https://doi.org/10.21921/jas.v9i04.%2011593Keywords:
Banded leaf and sheath blight, maydis leaf blight, Turcicum leaf blight, Maize, HexaconazoleAbstract
The diseases of maize viz. banded leaf and sheath, maydis leaf blight and Turcicum leaf blight occurs persistently to cause severe yield loss. New fungicide combination Hexaconazole 4% + Zineb 68% WP with different concentrations was evaluated as spray application to control the diseases. Among the different doses tested application of Hexaconazole 4% + Zineb 68% WP (60 + 1020g/ml a.i./ha) resulted minimum banded leaf and sheath blight disease severity of 6.45 per cent at 7th day and 7.50 percent at 15th days after second spray during kharif season while it was 6.87 at 7th and 7.70 per cent at 15th days after second spray during rabi season. Similarly minimum disease severity of maydis leaf blight was 6.87 per cent at 7th and 7.70 per cent was reported at 15th days after second spray during kharif season and disease severity of maydis leaf blight was 5.84 at 7th and 6.36 at 15th days after second spray during rabi season. The disease severity of Turcicum leaf blight was 8.10 at 7th and 8.26 at 15th days after second spray during kharif season and in rabi season disease severity was 5.84 at 7th and 6.38 at 15th days after second spray. Higher growth attributes (plant height and dry matter/plant) and yield attributes (cob weight and grain weight/cob) were recorded with the application of Hexaconazole 4% + Zineb 68% WP (60+1020 g/ml a.i./ha). Maximum gross return of Rs. 45,887, net returns of Rs. 31,437 and B:C ratio of 2.18 were also noted under Hexaconazole 4% + Zineb 68% WP (60+1020 g/ml a.i./ha).
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