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Assessment of Yield Loss in Guava Owing to Fruit Anthracnose

Hasna, M. K.
SSO
Plant Pathology Division Bangladesh Institute of Nuclear Agriculture Mymensingh

Abstract/ Executive Summary:

Four varieties of guava- Kazipiara, Mukundpuri, Sarupkhati and Deshi were used in an experiment to show how the level of anthracnose disease infection governs the the amount of fruit loss and to determine the effective number of chemical sprays to control fruit anthracnose.. Tilt (0.2%) was applied to guava plants at 10 days of interval for 6 times.Guava fruit weight loss owing to anthracnose severity was estimated on the basis of critical point mode. Gradient of fruit anthracnose severity was created through varied levels of fungicide spray. Percent fruit weight loss ranged from 16.4 (Dehi) to 30.4% (Kazipiara). Per cent fruit weight loss was positively correlated with fruit anthracnose level. Regression coefficient in both cases were highly significant.

Keywords: Guava, Anthracnose, Yield loss assessment

Location: Field of Plant Pathology Department, Bangladesh Agricultural University

Start Date: 19-09-1995

End Date: 02-08-1996

Program Area: Pest Management

Commodity: Diseases

Objectives:

To show how the level of anthracnose infection governs the the amount of fruit loss and to determine the effective number of chemical sprays to control fruit anthracnose.

Methodology:

Four varieties- Kazipiara, Mukundpuri, Sarupkhati and Deshi were used in the experiment. Tilt (0.2%) was applied to guava plants at 10 days of interval for 6 times. Spraying was started from early fruit stage. At the time of date recording fruit antracnose severity was done following the method of Singh, 1984. Total number of fruits, healthy fruits, diseased fruits were also recorded. First recording was done 24 days after the spray and continued for five times at an interval of seven days.

Source of Information: Pakistan Journal of Biological Science 3 (8): 1234-1236, 2000

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The disease severity of anthracnose decreased gradually with the increase in number of Tilt (0.2%).

Knowledge Management: Journal