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Efficacy of Fungicides in Controlling Purple Blotch of Summer/winter Onion

M.M. Rahman
Scientific Officer
RARS, Jamalpur

F E Elahi
Scientific Officer
Plant Pathology Division, BARI, Gazipur

B K Goswami
Chief Scientific Officer
TCRC, BARI, Gazipur

Abstract/ Executive Summary:

An experiment was laid out in the field of RARS, Jamalpur to evaluate the efficacy of some combination of fungicides in controlling purple blotch disease of onion. The design was RCBD having 3 replications using variety BARI Piaz-3. Among the treatments fungicides Secure + Rovral showed the best performance against reducing the disease as well as increase the yield

Keywords: Purple blotch , Onion, Field condition

Location: RARS, Jamalpur

Start Date: 00-00-2009

End Date: 00-00-2010

Program Area: Pest Management

Commodity: Diseases

Objectives:

To evaluate the efficacy of some new fungicides and combination of fungicides in controlling purple blotch disease of onion in the field condition.

Methodology:

The experiment was conducted in the field of RARS, Jamalpur using the seedlings of variety BARI Piaz-3 during 2009-2010 cropping season. Ten treatments (Nine fungicidal and one control) were arranged in Randomized Complete Block Design with 3 replications. The fungicides were used at 0.1%-0.2% concentration and the applications were initiated just after onset of the disease. Four sprays were executed at 10 days interval. Data were taken on disease incidence, weight of 10 bulbs, plot yield and analyzed statistically. Disease data were recorded and percentage reduction of disease over control and yield increase over control was calculated.

Source of Information: Annaul Report 2009-10,BARI

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The Fungicide combination Secure + Rovral and Rovral + Metaril showed better performance in reducing the purple blotch disease severity. Fungicide Score + Rovral perform comparatively well to reduce the disease. In case of yield Secure + Rovral treated plot produced significantly higher bulb yield then all other treatments including control. Rovral + Metaril also produced better yield than control on the other hand Score performed lowest than all treatments followed by control.

Knowledge Management: Report/Proceedings