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Management Options of Sclerotinia Rot of Marigold (2015 - 2016)

M. S. Hossain
RARS, Burirhat, Rangpur

Abstract/ Executive Summary:

An experiment was conducted at RARS, Burirhat, Rangpur during 2015-16 to evaluate the fungicides and bio-fungicide for controlling Sclerotinia rot of marigold. Treatments were soil application of Tricho-compost (2.5 t/ha), application of poultry refuse in the soil @ 6 t/ha, soil drenching with Mustard Oil Cake (600kg/ha), Soil drenching with Contaf 5 EC (0.1%), spray with Rovral 50 WP (0.2%), spray with Tilt 250 EC (0.1%)) and control. Only soil application of bio-fungicides or chemical had very little in controlling Sclerotinia rot of marigold. The highest Sclerotinia rot severity (68.02%) was found in untreated control plots and there were no significant differences in the effect of Tricho-compost and Mustard Oil Cake with control. Spray with Rovral was most effective against the disease where severity was lowest (29.99%) followed by Tilt (38.56%). Soil drenching with Contaf and Soil application of poultry refuse had some effect against the disease where severity was about 55%.

Keywords: White mold, Sclerotinia rot disease, Marigold, management, Fungicide

Location: An experiment was conducted at RARS, Burirhat, Rangpur

Start Date: 00-00-2015

End Date: 00-00-2016

Program Area: Pest Management

Commodity: Diseases, Marigold, Fungicide

Objectives:

To evaluate the fungicides and bio-fungicide for controlling Sclerotinia rot of marigold.

Methodology:

The experiment was conducted at Regional Agricultural Research Station, Burirhat, Rangpur during 2015-16. The experiment was laid out in Randomized Complete Block Design with 3 replications. Block to block and plot to plot distance was 1.5 m and 1 m, respectively. Unit plot size was 2.5m x 2m having plant spacing 50 cm x 25 cm. Marigold variety Inka was used in this experiment and transplanted on 23/11/2015. Treatments were as follows:

T₁: Soil application of Tricho-compost (2.5 t/ha)

T₂: Application of poultry refuse in the soil @ 6 t/ha

T₃: Soil mixing with Mustard Oil Cake (600kg/ha)

T₄: Soil drenching with Contaf 5 EC (0.1%)

T₅: Spray with Rovral 50 WP (0.2%)

T₆: Spray with Tilt 250 EC (0.1%)) and

T₇: Control (Farmers practice)

Recommended doses of fertilizers were used. Weeding, irrigation and other cultural practices were done as and when necessary during the cropping period. Data on disease severity was recorded and analyzed following computer package MSTAT-C and means were compared using Duncan’s Multiple Range Test (DMRT).

Source of Information: Annual Research Report 2015-16, Plant Pathology Division, BARI, Gazipur

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In this experiment, it was observed that foliar spray of Rovral 50WP (0.2%) is the most effective control measure for controlling sclerotinia rot of Marigold

Knowledge Management: Report/Proceedings