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Efficacy of Fungicides in Controlling Alternaria Blight of Cauliflower

R. Islam
Plant Pathology Division, BARI

M. I. Faruk
Plant Pathology Division, BARI

M. A. Rahman
Plant Pathology Division, BARI

Abstract/ Executive Summary:

Five fungicides namely, Upral 50 WP, Avance 25 EC, S. B. Dione 50 WP, Zebthrine M 80 WP and Rovral 50 WP were evaluated against Altenaria blight of cauliflower (Alternaria. brassicae, Alternaria. brassicicola) under field condition. The control plot was sprayed with plain water. Fungicide were sprayed at 12 days interval starting from the onset of disease and continued up to curd maturity and 3 sprays were needed. All the fungicide significantly reduced disease severity and increased yield compared to control. Among them, Rovral 50 WP and S. B. Dione 50 WP gave the highest disease reduction followed by Upral 50 WP. Rovral gave 61.06% disease reduction and 87.96% yield increase followed by Upral 59.30% disease reduction and 66.10% yield increase. Other fungicides gave 25 - 59% disease reduction with 40-56% increased yield over control

Keywords: Fungicides, Alternaria blight, Cauliflower

Location:

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Pest Management

Commodity: Diseases, Cauliflower

Objectives:

To test the effectiveness of some new fungicides in controlling Alternaria blight of cauliflower

Methodology:

Thirty days old seedlings of variety BARI cauliflower-1 (“Rupa”) were transplanted in 2.5 m x 1.2 m unit plot in 60 cm x 50 cm spacing. Ten seedlings were planted in each plot in two rows. Experiment was laid out in RCB design with three replications. Five fungicides namely Upral 50 WP, Avance 25 EC, S. B. Dione 50 WP, Zebthrine M 80 WP and Rovral were sprayed at 12 days interval beginning from the onset of disease and continued up to curd maturity . Plot under control treatment were sprayed with plain water. Rovral 50 WP was included as a standard check. The fungicides were applied as foliar spray at 0.2% suspension in water. Spray was started immediately after onset of disease on leaf and a total of 3 sprays were applied at an interval of 12 days. Data on percent curd infection, percent disease index (PDI) of curd spot, and yield per plant were recorded. Data were taken on disease severity at (0-7 scale). (Meah 1994) and expressed in PDI (Percent disease index) .

Source of Information: Annual research Report, Plant Pathology Division, BARI--2013-14

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

All the fungicides significantly reduced disease severity and increased yield of cauliflower compared to control. Among them, Rovral 50 WP and S. B. Dione 50 WP gave the highest disease reduction followed by Upral 50 WP. Rovral gave 61.06% disease reduction and yield increased by 87.96% followed by Upral 59.30% disease reduction and 66.10% higher yield. Rovral found to be the best fungicide for reducing the disease incidence and increasing yield. Among the new fungicides Upral 50 WP and S. B. Dione 50 WP decreased the disease incidence and increased the yield compare to control and the efficacy at per with Rovral. So the effective new fungicide Upral 50 WP and S. B. Dione 50 WP may be recommended for controlling Altenaria blight of cauliflower

Knowledge Management: Report/Proceedings