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Study on Seedling Diseases of Jackfruit (artocarpus Heterophyllus L.) in Bangladesh

M. Salahuddin M. Chowdhury
Professor
Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka-1207. Bangladesh

H. E. M. Khairul Mazed
MS Student
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207. Bangladesh.

Israt Jahan Irin
Ph.D. Student
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207. Bangladesh.

Md. Hafizur Rahman
MS Student
Department of Agricultural Extension and Information System, Sher-e-Bangla Agricultural University, Dhaka-1207. Bangladesh.

Jannatul Ferdous Moonmoon
MS Student
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207. Bangladesh.

Abstract/ Executive Summary:

The existing health situation of jackfruit seedling of nursery diseases of jackfruit species in the country is in a stage to be upgraded for successful fruit production to meet the national demand. Experiments were carried out during the period of July, 2012-October, 2014 to study the status of seedling diseases of jackfruit in different major growing areas of Bangladesh. Important plant pathogen Phyllosticta artocarpina and Pseudomonas sp. were detected and identified. The incidence and severity of leaf spot and leaf blight of jackfruit seedling were differed location to location and significant variations were observed. The maximum incidence and severity of the leaf spot disease observed in Dhaka and Gazipur district in month of October. The minimum incidence and severity of the leaf spot disease observed in Barisal district in month of January. Again the maximum incidence and severity of leaf blight disease is observed in Dhaka and Gazipur district in the month of April. Similarly the minimum incidence and severity of leaf blight disease is observed in Khagrachari district in the month of October

Keywords: Jackfruit, Seedling, Disease, Survey.

Location: Sher-e-Bangla Agricultural University, Dhaka-1207 with 3 other districts of Bangladesh

Start Date: 00-07-2012

End Date: 00-10-2014

Program Area: Pest Management

Commodity: Jackfruit, Diseases

Objectives:

The present study was undertaken with the following objectives. i) Survey on the seedling diseases of Jackfruit in selected nurseries of Bangladesh. ii) Identification of causal organisms of the seedling diseases of jackfruit. iii) Epidemiological survey on the disease prevalence of seedling diseases of jackfruit.

Methodology:

3.1 Experimental site and period The study was carried out at Sher-e-Bangla Agricultural University, Dhaka-1207 with 3 other districts of Bangladesh and it was carried out from July, 2012-October, 2014. 3.2 Preparation of nursery soil and seedlings The substratum was prepared by mixing soil, sand and well decomposed cow dung and sterilized with 5 ml formalin (40%) diluted with 20 ml water for 4 kg soil. The prepared soil was heaped in a square block. Soil heap was inocula. After 4 days of treatment, earthen pots were filled up with the sterilized soil. 3.4 Location of survey area Prevalence of diseases occurring on Jackfruit seedlings raised in the selected nurseries was surveyed. The experiment was carried out in eight nurseries of Dhaka, Gazipur, Khagrachari and Barisal. The eight nurseries of four districts are surveyed: 3.5 Age and number of seedlings 3.6 Observation of the symptoms Symptoms of the diseases were studied by visual observation. Sometimes hand lens were used for critical observation of the disease and sometimes a disease was identified based on matching the observed symptoms in the infected plants with the symptoms published in Ber and other Jackfruit disease compendium. 3.7 Survey period Altogether eight surveys were made during the period from July, 2012 to April, 2014. Where First, second, third, fourth, fifth, sixth, seventh, and eighth surveys were made in July, 2012; October, 2012; January, 2013; April, 2013; July, 2013; October, 2013; January, 2014; and April, 2014 respectively. 3.8 Collection of diseased specimen Diseased leaves were collected from the infected plants representing the different areas of the survey. The specimens were preserved in the laboratory following standard procedure of preservation of disease specimens until isolation was made. 3. 9 Data collection during survey During the survey in the nurseries, total numbers of jackfruit seedling as well as number of diseased seedling in the nurseries were recorded. Then 30 seedlings were randomly selected for counting diseased leaves and disease free leaves. Moreover, five leaves per plant were randomly selected to determine the disease severity. 3.10 Determination of disease incidence and disease severity For calculation of incidence of disease every seedling was counted in the nursery and also counted the infected seedlings and then expressed in percentage.

3.11 Meteorological data collection Meteorological data of the experimental period were collected from Meteorological Department, Agargaon, Dhaka. 3.12 Data analysis On different parameters were analyzed in two factor randomized block design (RCBD) through computer software MSTAT-C (Anonymous 1989). Duncan’ s Multiple Range Test (DMRT) and Least Significant difference (LSD) test were performed to determine the level of significant differences and to separate the means within the parameters.

Source of Information: International Journal of Applied Research 2015; 1(4): 24-29

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Two different diseases were recorded in jackfruit seedlings during the survey period under four different geographical locations viz. Dhaka, Gazipur, Barisal, and Khagrachari. Incidence and severity of leaf spot and leaf blight varied from location to location and time to time. The highest incidence and severity of leaf spot were recorded in the month of October (2012 & 2013) at Dhaka. The lowest incidence and severity of leaf spot were observed in January (2013 & 2014) at Barisal. The highest incidence and severity of leaf blight were recorded in the month of April (2012 & 2013) at Dhaka. The lowest incidence and severity of leaf blight were observed in October (2013 & 2014) at Khagrachari.

Knowledge Management: Journal