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Repellent Effect of Indigenous Plant Bhat (clerodendron Viscosum L.) Leaf on Tribolium Castaneum Herbst

M. M. Husain
BCSIR Laboratories, Binodpur Bazar, Rajshahi, Bangladesh

M. Munsur Rahman
BCSIR Laboratories, Binodpur Bazar, Rajshahi, Bangladesh

Abstract/ Executive Summary:

Repellent response of Bhat (Clerodendron viscosum L) to adult and larvae of Tribolium castaneum was studied. Results indicated that both the adults and larvae were repelled by contact with food medium treated with Bhat leaf dust conditioned with 100, 500, 1000 and 2000 ppm of flour.

Keywords: Repellent effect, Plant material, Grain protectant, Tribolium infestation

Location: BCSIR Laboratories, Binodpur Bazar, Rajshahi, Bangladesh

Start Date:

End Date:

Program Area: Pest Management

Non-commodity: Extract (plant, seed)

Objectives:

Attempts were made to evaluate the repellent effect of this plant material (Bhat Leaf) used as grain protectant against Tribolium infestation.

Methodology:

Leaves of bhat were collected from the field, sun dried and powdered in grinding machine and then sieved through a 80 mesh sieve. The powder thus obtained was mixed with wheat flour to prepare 100, 500, 1000 and 2000 ppm concentrations. Petri dishes (15 cm diameter, 2 cm deep) were used to study the response of T. castaneum to contact with bhat dust. For this experiment fresh food was treated with bhat leaf dust by adding the appropriate amount and mixing thoroughly in a blender. Concentrations of 100, 500, 1000 and 2000 ppm bhat dust were used in the experiment. The experiments were replicated five times for each treatment. Each replicate contained 20 adults and larvae separately. Fresh insects were used throughout the experiment. Wheat flour was used as food media in the experiments. Experiments on the response to contact with bhat leaf were conducted in Petri dishes. The dish was divided into two equal halves by a mark on the outside surface. Using a partition, one half of the dish was loaded with untreated food medium (2g) and the other half with 2g of food treated with the plant dust. After loading, the partition was removed and 20 larvae were released at the middle of the dish. This provided an option for the larvae to select either the untreated medium or the medium treated with bhat. The petridish was placed in an incubator set at 30^OC. The similar experiments were conducted with the adults. After 24 hours the petridish was removed from the incubator and Tribolium larvae and adults were collected from each half, their numbers were counted and recorded.

Source of Information: Bangladesh J. Sci. Ind. Res. 41(1-2), 67-72, 2006

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The results of the present experiment indicate the possible use of this indigenous plants with in insecticidal properties, for the control of T. castaneum in warehouse as a repellent. Bags of grains or other stored products treated with this repellent compound may prevent Tribolium from attacking and infesting the food and thus the synthesis of this substances commercially may prove to be of practical value in Integrated Pest Management Programmes.

Knowledge Management: Journal