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Response of Some Jute (corchorus Spp.) Accessions to Jute Yellow Mite, Polyphagotarsonemous Latus Banks Under Natural Condition

Md. Nazrul Islam
Principal Scientific Officer
Department of Entomology, Bangladesh Jute Research Institute, Dhaka

Khandakar Shariful Islam
Professor
Department of Entomology, Bangladesh Agricultural University, Mymensingh, Bangladesh

Mahbuba Jahan
Professor
Department of Entomology, Bangladesh Agricultural University, Mymensingh, Bangladesh

Md. Sohanur Rahman
Scientific Officer
Department of Entomology, Bangladesh Jute Research Institute, Dhaka

Abstract/ Executive Summary:

The jute yellow mite Polyphagotarsonemus latus constitutes one of the major pests of jute crop in Bangladesh. The objective of this work was to find out the sources of resistance/tolerance accessions against jute yellow mite. This experiment was carried out in the fields of Bangladesh Agricultural University, Mymensingh, JAES, Manikganj and the Central station, BJRI, Dhaka, during jute growing seasons 2011 and 2012. Out of 79 accessions, only 13 accessions were found less susceptible to yellow mite. These accessions were studied further in the field and net-house condition. Considering the level of infestation in the net-house condition only three accessions namely 1510, 890 and 33-1-244 (A) 2 were found to perform better showing 9.75, 9.68 and 9.93% infestation. In field condition, in case of olitorius, accession 1510 showed lowest infestations (9.90%) giving maximum plant height 324.15 cm and yield 3.26 ton/ha. In case of capsularis, accession 890 also resulted minimum infestation (10.23%) giving satisfactory plant height 315.27 cm and yield 3.14 ton/ha respectively. Accessions 1510, 890 and 33-1-244 (A) 2 could be recommended as breeding materials for evolving yellow mite resistant jute variety.

Keywords: Germplasm, Invasion, Resistance, Mite population, Damage index, Yellow mite.

Location: Department of Entomology, Bangladesh Agricultural University, Mymensingh, Bangladesh

Start Date: 00-00-2011

End Date: 00-00-2012

Program Area: Pest Management

Commodity: Jute, Mite

Objectives:

The objective of this work was to find out the sources of resistance/tolerance accessions against jute yellow mite.

Methodology:

A total of 79 local and exotic germplasms were collected from the Germplasm Department of BJRI. Seeds of all accessions were sown on 15^th April, 2011 at (BAU) and JAES, Manikganj. Selected accessions were also sown on 20^th April, 2012 following RCBD. All the accessions were sown in the rows of 2m length with 30 cm row to row space. The varieties O-9897 and CVL-1 were grown as check. The plants were exposed to natural infestation by yellow mite and no measures were applied to control the target pest but all the necessary agronomic practices were adopted in raising the crop. Infestation of jute plants under field condition was recorded at different periods of plant growth starting from 60 days after sowing (DAS) to harvesting. Percent Plant damage (PPD) was calculated by following formula (Pradhan, 1988):

PPD= B/A X 100

Where,

A= Number of total plants or leaves

B= Number of damaged infested plants or leaves.

Based on nature of damage, rating score and PPD, the accessions were categorized into five groups (Pradhan, 1988).

Out of 79 accessions, 66 were severely damaged having higher rating score (>2) as well as greater PPD (>2) and were eliminated. The rest of the 13 accessions along with the two check varieties O-9897 and CVL-1 were again sown in the fields at JAES, Manikganj and Central station Dhaka in RCBD with four replications. The size of individual plot was 3.1m X 2m and spacing between plot to plot and line to line was 0.5m and 0.3m respectively.

Infestations of jute plants were recorded at different periods of plant growth starting from 60 days after sowing (DAS) to harvesting.

PDI (Plant Damage Index) = Sum of all the numerical rating/ Total no. of plants observed X maximum score (5) x100

In the net house accessions/varieties were grown in pots. The pots were arranged in a CRD. The plants were artificially infested with yellow mite collected from the field. Infestation percentage of the plants was recorded at 15^th days after artificial infestation.

Statistical Analysis: The experiments were conducted in CRD and RCBD (Gomez & Gomez, 1984). The data were analyzed using one or two way ANOVA. The treatment means were compared using Tukey’s HSD Post-hoc statistics (SPSS).

Source of Information: Reviews In Food And Agriculture (RFNA)1(2) (2020) 50-53

Article Link (Online Journal): DOI: http://doi.org/10.26480/rfna.01.2020.50.53

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the the present study, when the tolerance ability on the basis of nature of damage, rating score and percentage of damage index (PDI) was considered, 13 accessions were found as promising against the pest yellow mite. They showed significantly low rating score and PDI than the two check varieties at the peak period of mite infestation. Out of these 13 accessions three were categorized as tolerant for less mite infestation and the rest ten as moderately tolerant. These tolerant accessions could be further recommended as breeding materials for developing mite resistant variety.

Knowledge Management: Journal