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Preliminary Investigation of Bast Fibre Crops Against Root-knot Diseases ( Meloidogyne Sp.)

K.Sultana
PSO
Pathology Department,Pest Management Division, BJRI, Manik Mia Avenue, Dhaka-1207.

Abstract/ Executive Summary:

The experiment was conducted in the field of JAES, Manikganj following RCBD with three replications to find out of jute germplasms for tolerant/resistant against root-knot diseases.Root-knot diseases was caused by Meloidogyne incognita and M .javanica. They can live in soil year after year and thrive well under water stressed codition.Attack at early stage causes stunted growth of plants with abnormal swollen tip root system. In June, July months when planting is done for seed crop nematode population is very high. Nematode produces severe galls in root system which favours fungal attack and ultimately the plants become sick and in severe cases die. Fourteen germplasm accessions were screened against root-knot disease caused by Meloidogyne sp. After 45 days of inoculation the plants were uprooted carefully without disturbing the roots and washed in laboratory. The plants of each accession was examined for gall formation. Out of 14 accessions , 4 capsularis accessions were found tolerant and rest 10 lines were found moderately resistant.

Keywords: Investigation, Bast fibre crops, Root-knot, Resistant

Location: JAES, Manikganj

Start Date: 30-03-2002

End Date: 30-10-2002

Program Area: Pest Management

Commodity: Jute

Objectives:

1.To screened germplasms against root-knot diseases.

2.To help the breeders to develop the resistant varieties against root-knot

Methodology:

The plants were sown in sterilized soil following RCBD with three replications and was include with pure culture of Meloidogyne sp. at proper age of the plant. Preparation of inoclution: Tomato plants previously were grown in nematode free soil was inocluted by adding nematode infected roots of jute. After 60 days, egg mass of nematodes were collected from tomato root and incubated in a watch glass at 25^oC . Selected germ plasm materials were inocluted with the newly hatches larvae suspended in sterilized water ( 50 larvae/ml). Each plant was inocluted with 20 ml of this suspension.Following records were kept: 1) Date of sowing of tomato plants 2)Date of sowing of germination materials 3) Date of inoclution 4) Observation of root-system of each material for gall formation time to time.

Source of Information: Annual Report, 2002, BJRI

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Five thousands taka only

Total Budget (Tk.) : Five thousands taka only

Achievement/Findings:

Fourteen germ plasm accessions were screened against root-knot disease caused by Meloidogyne sp. After 45 days of inoculation the plants were uprooted carefully without disturbing the roots and washed in laboratory. The plants of each accession was examined for gall formation. Out of 14 accessions , 4 capsularis accessions were found tolerant and rest 10 lines were found moderately resistant.

Knowledge Management: Report/Proceedings