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Studies on the Biology of Pulse Beetle. Callosob- Ruchus Chinensis L. (bruch Idae, Coleoptera) on Stored Pu Lses

M. S. I. Bhuiyan
Department of Entomology, Bangladesh Agricultural University.

S. A. Peyara
Department of Entomology, Bangladesh Agricultural University.

Abstract/ Executive Summary:

The pulse beetle, Callosobruchus chinensis L. is one ef the most serious pests of stored pulses in Bangladesh. The biology of this species was studied on mung (Phaseolus aureus) seeds. Just after hatching, the young larvae bored into the seeds and began to consume the contents causing great damage. Both the larvae and pupae were completely hidden within the seeds. The adults mated a few hours after emergence and began to oviposite within 24 hours. The adult males were short lived and smaller than the females. The life cycle was completed in 30 to 32, 22 to 23 and 44 to 46 days during early summer, mid-summer and winter seasons respectively. Ten generations of this species were recorded at laboratory condition.

Keywords: Pulse betle, Control measure, Yield losses

Location: BAU, Mymensingh

Start Date:

End Date:

Program Area: Pest Management

Commodity: Insects

Objectives:

A thorough knowledge regarding biology, habit, nature and extent of damage caused by this pest is essential for effective control measures.

Methodology:

In order to have a continuous supply a stock culture of the beetle was maintained in the laboratory. Soon after emergence of the beetles, a pair of both sexes were introduced in selected petridishes containing fresh seeds. Egg laden seeds were separated from others after 24,48,72 and 96 hours of oviposition and examined daily under microscope to determine the incubation period. As the larvae were internal feeders, some of the seeds were broken to observe the larval and pupal development inside. To consecutive generations of C. chinensis L. were studied to find out the seasonal influence upon the duration of life cycle. The number of eggs laid per female and the duration of oviposition, incubation, larval and pupal stages as well as the adult longevity were recorded.

Source of Information: Bangladesh J. Agril Sci. 5(1): 93-97: 1978

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In this experiment, it was observed that the young larvae bored into the seeds and began to consume the contents causing great damage of the stored seeds. The life cycle of C. chlnensis L. was found to be completed in 30 to 32, 22 to 23 and 44 to 46 days in early summer, mid-summer and winter seasons respectively.

Knowledge Management: Journal