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Management of Gummosis Disease of Wood Apple

S. R. Sarker
Scientific Officer
ARS, Burirhat Rangpur

A. K. Saha
Senior Scientific Officer
ARS, Burirhat Rangpur

M. A. Mannaf
Chief Scientific Officer
ARS, Burirhat Rangpur

Abstract/ Executive Summary:

An experiment was conducted at ARS, Burirhat, Rangpur during 2012-13 to find out the suitable fungicide(s) in controlling gummosis of wood apple. Six different fungicides namely, Acrobat MZ, Melody Duo, Secure, Ridomil Gold, Bordeaux paste and Dithane M-45 were tested against the disease along with control. Among the fungicides, Secure was found effective in reducing both in numbers (80.08%) and area (87.81%) of infection court. Effectivness of Acrobat MZ was found close to Secure in reducing number of infection court (78.41%) and court area (82.50%). Other fungicides were found not effective. The number and area of infection court increased 5.29% and 14.07%, respectively in control treatment.

Keywords: Gummosis, Wood apple

Location: Burirhat, Rangpur

Start Date: 00-00-2012

End Date: 00-00-2013

Program Area: Pest Management

Commodity: Wood apple

Objectives:

To find out an appropriate fungicide for controlling the gummosis disease and saving wood apple producers.

Methodology:

The experiment was conducted in the wood apple orchard of ARS, Burirhat, Rangpur during 2012-13 following a randomized complete block design with 7 treatments and 3 replications. Treatments were application of Acrobat MZ, Melody Duo, Secure 600 WG, Ridomil Gold, Bordeaux paste, Dithane M-45 and untreated control. Infected portions were scrapped well with sharp knife. Paste of specific fungicide was applied on scrapped portions. The paste was prepared by mixing fungicide with sterilized soil in the ratio of 1: 10. Pasting was done at 14 days interval. Plants under treatments were sprayed with specific fungicides (treatment wise) on non-infected area. Data were recorded on number and area of the infection courts.

Source of Information: Annual Report 2012-13, BARI

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Data on initial number of infection court varied from 14 - 32 per plant and after treatment it decreased to 3 - 25 per plant while in control plant the range was increased to some extent by 15-32. Before the application of treatment the range of infection area/court was 2.00 – 122.00 cm^₂ and it was 0 – 85.00 cm² after treatment. In control plants the area per court was increased and it was 3 - 88.00 cm² before observation and 8-94 cm²after observation. The highest reduction in number of infection court (80.08%) was found in Secure treated plants followed by Acrobat (78.41%). Both the number and area of infection courts decreased in all treatments compared to untreated control. Number of infection court increased by 5.29% and those of areas increased by 14.07% in control treatment.

Knowledge Management: Report/Proceedings