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Biological Studies of Kenaf Seed Beetle

F. Zaman
PSO
Entomology Division, BJRI, Manik Mia Avenue, Dhaka-1207.

Md.Ahsanul Haque
S.O
Entomology Division, BJRI, Manik Mia Avenue, Dhaka-1207.

Abstract/ Executive Summary:

The life cycle of kenaf beetle (Zabrotes subfasciatus) was studied in the entomology laboratory of BJRI during May-June 2000.To know life history,behavior,fecundity and nature of damage. Beetle infested seeds were collected from mesta kenaf department of BJRI and stock – culture of kenaf beetle were maintained on it. 10 grams of fresh kenaf seeds (HC-95) were taken in glass jelly jar and single pair of newly emerged adult beetle was released on it covered with linen cloth. Regular observations were made regarding the facundity, larva & adult emergence, Twenty-eight egg were laid singly per female on the seed. Eggs were light yellowish transparent and semi-ovate in shape, Incubation period was 2-3 days. Total larval development took place within the seed. Total life cycle (egg-adult) completed within 32-38 days. The adult life span was recorded as 25-45 days. Detailed life history and control measures will be studied in the next year

Keywords: Biology, Kenaf, Seed beetle

Location: Laboratory of Entomology Division

Start Date: 01-05-2001

End Date: 30-06-2001

Program Area: Pest Management

Commodity: Jute

Objectives:

1) To know the duration of different developmental stages of Kenaf seed beetle

2)To know behavior, fecundity, alternate host

3) To know nature of damage

Methodology:

The life cycle of kenaf seed beetle was studied in the laboratory of Entomology Division, BJRI during May,2001 to June, 2001. Seed infested by Kenaf seed beetle were collected from Mesta and Kenaf Department of BJRI and stock-culture of Kenaf beetle were maintained. ten gm of fresh kenaf seeds (HC-95) were taken in jelly jar of glass and a pair of newly emerged adult beetle was released on it and was covered with linen cloth.Regular observations were made regarding the fecundity,larva & adult emergence.A single female laid thirty-two eggs on the seeds. Eggs wereyellowish in color and semi-ovate in shape.Incubation period was 3 to 4 days

Source of Information: Annual report, 2001, BJRI

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Three thousand taka only

Total Budget (Tk.) : Three thousand taka only

Achievement/Findings:

The life cycle of kenaf beetle (Zabrotes subfasciatus) was studied in the entomology laboratory of BJRI during May-June 2000. Beetle infested seeds were collected from mesta kenaf department of BJRI and stock – culture of kenaf beetle were maintained on it. 10 grams of fresh kenaf seeds (HC-95) were taken in glass jelly jar and single pair of newly emerged adult beetle was released on it covered with linen cloth. Regular observations were made regarding the facundity, larva & adult emergence, Twenty-eight egg were laid singly per female on the seed. Eggs were light yellowish transparent and semi-ovate in shape, Incubation period was 2-3 days. Total larval development took place within the seed. Total life cycle (egg-adult) completed within 32-38 days. The adult life span was recorded as 25-45 days. Detailed life history and control measures will be studied in the next year

Knowledge Management: Report/Proceedings