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Effect of Chemicals in Controlling Vegetative Malformation of Mango Grafts

M. G. Mortoza,
Senior Scientific Officer
RHRS,BARI, Chapai Nawabganj

Dr. M Sakhawat Hossain
Senior Scientific Officer
Plant Pathology Division,BARI,Gazipur

Abstract/ Executive Summary:

The experiment was conducted at the Regional Horticulture Research Station, Chapai Nawabganj during February to June, 2007. The performance of two fungicides (Bavistin and Tilt) and one hormone (Naphthalene acetic acid, NAA) were evaluated for their efficacy in controlling vegetative malformation of mango. The chemicals were sprayed on mango grafts of seven months. Grafts of four varieties viz. BARI Aam- 1, BARI Aam- 2, BARI Aam- 3 and Khirsapat were selected for this study. Spray was started on 5^th February, 2007 and continued up to 5^th June. Chemicals were sprayed at 15 days interval None of the chemicals was able to control the disease effectively. However, the lowest disease incidence (2.49%) as well as the highest disease reduction (80.11%) as compared with the unsprayed plants was noted in plants sprayed with Planofix. Bavistin and Tilt .

Keywords: Mango, Malformation, Chemicals

Location: Regional Horticulture Research Station,BARI, Chapai Nawabganj

Start Date: 01-07-2006

End Date: 30-07-2007

Program Area: Pest Management

Commodity: Mango

Objectives:

The objective of this study was to find out the effect of chemicals in controlling vegetative malformation in mango grafts.

Methodology:

The experiment was conducted at the Regional Horticulture Research Station, Chapai Nawabganj during February to June, 2007. The performance of two fungicides (Bavistin and Tilt) and one hormone (Naphthalene acetic acid, NAA) were evaluated for their efficacy in controlling vegetative malformation of mango. The chemicals were sprayed on mango grafts of seven months. Grafts of four varieties viz. BARI Aam- 1, BARI Aam- 2, BARI Aam- 3 and Khirsapat were selected for this study. Spray was started on 5^th February, 2007 and continued up to 5^th June. Chemicals were sprayed at 15 days interval. The incidence of malformation was recorded at the end of the study and expressed as percent plant infected by the disease.

Source of Information: Annual Report (2006-07), Plant Pathology Division, BARI,Gazipur

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The chemicals under investigation considerably influenced the development of vegetative malformation in mango grafts. None of the chemicals was able to control the disease effectively. However, the lowest disease incidence (2.49%) as well as the highest disease reduction (80.11%) as compared with the unsprayed plants was noted in plants sprayed with Planofix. Bavistin and Tilt controlled 73.72 and 62.38% disease, respectively.

The interaction effect of chemicals with variety was significant. The lowest disease incidence (1.77%) was recorded in BARI Aam- 2 grafts sprayed with Planofix which was followed by BARI Aam- 3 sprayed with Planofix (1.90%). The highest disease incidence (16.66%) was noted in BARI Aam- 3 grafts.

Knowledge Management: Report/Proceedings