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Efficacy of Different Fungicides in Controlling Bipolaris Leaf Blight and Leaf Rust in Wheat

M. M. A. REZA
Wheat Research Centre, BARI

P. K. MALAKER
Wheat Research Centre, BARI

K. MUSTARIN
Wheat Research Centre, BARI

Abstract/ Executive Summary:

Six fungicides of different groups were evaluated for their effectiveness in controlling Bipolaris leaf blight and leaf rust of wheat under field condition. All the fungicides were found very effective against Bipolaris leaf blight with 99% disease control. The highest yield increase of 84% was obtained from spraying with Topzim Super and Storm, which was followed by Fasal Hexa, Tilt, Ramoni and Bension. In case of leaf rust, all the fungicides were found highly effective with 100% disease reduction. The highest yield increase of 504% was obtained from controlling leaf rust with Bension, which was followed by Storm,Topzim Super, Ramoni, Fasal Hexa and Tilt.

Keywords: Bipolaris leaf blight, Leaf rust. Wheat, Field condition.

Location:

Start Date: 00-00-2014

End Date: 00-00-2015

Program Area: Pest Management

Commodity: Fungicide, Wheat

Objectives:

To evaluate the efficacy of some new fungicides of different groups in controlling Bipolaris leaf blight and leaf rust of wheat under field condition.

Methodology:

Six fungicides of different groups were tested for their efficacy against Bipolaris leaf blight and leaf rust of wheat. The fungicides were Tilt 250 EC (Propiconazole), Topzim Super 350 SC (Imidachlopid + Thioram), Storm 280 SC (Cyproconazole + Azoxystrobin), Ramoni 230 EC (Propiconazole + Difenoconazole), Bension 30 EC (Propiconazole + Difenoconazole) and Fasal Hexa 10 EC (Hexaconazole) were tested as new fungicides. The fungicides were sprayed twice, once at heading stage and another at 15 days of heading. An unsprayed control was maintained for comparison. The susceptible variety Kanchan was used for BpLB and Morocco for leaf rust. Seeds were sown in 1.2 x 2 m plots with 20 cm row-spacing on 18 December. The experiment was laid out in RCB design with three replications. Recommended doses of fertilizers were used and three irrigation were applied during the crop cycle. Disease severity was scored as percent diseased leaf area (% DLA) on 10 flag leaves of 10 main tillers selected randomly in each plot. Severity of BpLB was recorded according to the scale suggested by Hetzler (1992) and leaf rust severity was scored according to modified Cobb scale (Stubbs et al. 1986). Data on grain yield per plot were recorded. Percent disease reduction and yield increase over unsprayed control were calculated

Source of Information: Annual Research Report, Wheat Research Centre, BARI--2014-15

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Among the six fungicides tested against Bipolaris leaf blight, all were found very effective in controlling the disease. The lowest disease severity was recorded in the plots sprayed with Tilt, which was similar to Topzim Super, Bension, Storm, Ramoni and Fasal Hexa. The unsprayed plot showed the highest disease severity. The percent disease reduction by the very effective fungicides ranged from 99% over unsprayed plot. The highest grain yield was obtained with Storm, and the increase in yield by this fungicide over unsprayed control was 84%, which was followed by Topzim Super, Fasal Hexa, Tilt, Ramoni and Bension. Significant control of leaf rust was observed with foliar sprays of Tilt, Topzim Super, Storm, Ramoni, Bension and Fasal Hexa in controlling the disease. The unsprayed plot showed the highest disease severity. The lowest disease severity was recorded with Tilt, Topzim Super, Storm, Ramoni, Bension and Fasal Hexa. The effective fungicides controlled the disease by 100% with 420-504% increase in grain yield over unsprayed plot. The highest increase in grain yield was obtained with Bension, which was followed by Storm, Topzim Super, Ramoni, Fasal Hexa and Tilt.

Knowledge Management: Report/Proceedings