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Biological and Ecological Studies of Parasitoids and Predators of Jute Weevil/yellow Mite

Ahsanul Haque
Scientific Officer
Pest Management Division,BJRI, Manik Mia Aveue, Dhaka-1207.

N.Sultana
PSO
Pest Management Division,BJRI, Manik Mia Aveue, Dhaka-1207.

Abstract/ Executive Summary:

The experiment was conducted in the fields of JAES, Manikganj and Central station, Dhaka to detect and identify the parasitoids of jute weevil( Apion corchori).Jute weevil (Apion corchori) is one of the pests of jute and greatly responsible for deteriorating the quality of fibre. Bracon greeni reported as the important parasitoid of the Jute weevil in previous years. Study on the biology and ecology of this parasitoid is needed. The highest mean monthly parasitism was observed 3.89 in July and lowest parasitism was 1.69 recorded in the month of May. Lower number of parasitism in the beginning of season may be that in early stages of the plant apion (Apion corchori) infestation was lower than the latter stage of the crop. It was found that Bracon greeni is exotic parasite of jute weevil. Biological studies are going on.

Keywords: Parasitoids, Jute weevil, Jute

Location: JAES, Manikganj, Dhaka

Start Date: 30-03-2001

End Date: 30-10-2001

Program Area: Pest Management

Commodity: Jute

Objectives:

1. To detect and identify the parasites, predators and pathogen associated with the jute insect pest

2. To know the consumption rate of parasites and predators

3. To know the biology, ecology,control efficiency and the synchronization of the life history of parasites and predators.

4. To help to develop a pragmatic biological control measures of this pest

Methodology:

Jute plants were grown in pot and the field.At the time of sufficient infestation(Bore/plant), the plants were reared in the insectorium on potted plants with a view to record their parasitoids.In case of mite predators the mite-infested leaves of jute plant was collected from the pot and the field and was examined under bionocular microscope regularly for the same. Detail studies on behaviour, fecundity, logevity and synchronization of the life cycle with these of the host species was made. Records were kept: 1.Date of sowing 2.Date of first infestation of host 3. Stage of host 4.Stage of crop

Source of Information: Annual report of Bangladesh Jute Research Institute, 2001

Article Link (Online Journal):

Funding Source:

1. Government

Budget: One thousand and five hundred

Total Budget (Tk.) : One thousand and five hundred

Achievement/Findings:

Jute weevil(Apuion corchori) is one of the pest of jute and greatly response for deteriorating the quality of bibre.Bracon greeni reported as the important parasitoid of the Jute weevil in previous years. Study on the biology and ecology of this parasitoid is needed. The highest mean monthly parasitism was observed 3.89 in July and lowest parasitism was 1.69 recorded in the month of May. Lower number of parasitism in the beginning of season may be that in early stages of the plant apion (Apion corchori) infestation was lower than the latter stage of the crop. It was found that Bracon greeni is exotic parasite of jute weevil. Biological studies are going on.

Knowledge Management: Report/Proceedings