Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Effects of Temperature, Rainfall and Relative Humidity on Leaf Spot of Jackfruit Seedling and Its Eco-friendly Management

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

I. Hossain
Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

Experiments were carried out during 2005-08 to study the effect of weather prevalence of seedling diseases of jackfruit in different areas of Bangladesh and develop an environment friendly disease management practice. Leaf spot causal pathogen Colletotrichum gloeosporioides was identified. Incidence and severity of leaf spot at seedling stage were studied and significant variations were observed depending on weather factors. Occurrence of seedling diseases was significantly influenced by temperature, rainfall and relative humidity. Comparative effectiveness of BAU-biofungicide either alone or in combination with two fungicides viz. Cupravit and Bavistin were evaluated on jackfruit in the nursery. Among the treatments applied, Trichoderma harzianum based BAU-Biofungicide showed best result in controlling leaf spot disease.

Keywords: Jackfruit seedling, Leaf spot disease, Ecofriendly management, BAU-Biofungicide

Location: Three villages namely Shreerampur, Jalisha and Jhatra of Dumki upazila under Patuakhali district.

Start Date: 00-01-2005

End Date: 00-12-2008

Program Area: Crop-Soil-Water Management

Commodity: Jackfruit

Objectives:

To investigate the effects of temperature, rainfall and humidity on the leaf spot disease of jackfruit and to suggest an eco-friendly management package for the disease.

Methodology:

Major growing areas of jackfruit were identified and selected based on information gathered from different government and non-government organizations. Altogether 12 nurseries in four districts of Bangladesh were surveyed and diseases of seedlings of jackfruit were studied and recorded. Diseased seedlings were collected and brought to the laboratory and the samples were washed thoroughly under running tap water and surface sterilized with 4% NaOCl. The diseased parts were then cut into 1.0 cm long pieces. One set of pieces was placed on three layers of wet blotters equidistantly in Perspex plates and another set placed on PDA medium. Both sets were incubated for 7 days under 12/12 hr. alternate cycles of near ultra violet light and darkness at 22 ± 2^oC. Then the pathogens were isolated and identified. Four visits were made in the selected 12 nurseries during the growing season on one to two year-old seedlings over a period of one year. In each nursery 30 tagged seedlings were considered for disease incidence and disease severity. Moreover, data on air temperature, moisture (R.H.) and rainfall were recorded.

Source of Information: The Agriculturists 9(1&2): 126-136(2011) ISSN-1729-5211, A Scientific Journal of Krishi Foundation

Article Link (Online Journal): http://banglajol.info/index.php/AGRIC/article/view/9487/7032

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The weather parameters have profound effect on the prevalence of seedling disease of jackfruit and the effect differs significantly in different weather conditions. Critical study should be conducted on host-pathogen system to find out the most appropriate time to combat the disease at minimum effort. Further, other parameters of epidemiology viz. total amount of rainfall in the growing period, leaf wetness period, vapor presser deficit, sunshine hour, microclimatic parameters including canopy temperature, relative humidity etc. should be critically evaluated to have better understanding of disease development. Trichoderma harzianum based BAU-Biofungicide, a new means of disease control in the nursery plantations, could be employed against leaf spot of jackfruit in the nurseries of Bangladesh as an eco-friendly disease management tool.

Knowledge Management: Journal