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Agro-Science
Journal of Tropical Agriculture, Food, Environment and Extension
 

ISSN 1119-7455
   
 
         
 
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Article No 5 of Volume 7.2 (2008)
 
    
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LABORATORY EVALUATION OF THE TOXICITY OF METHANOLIC EXTRACT OF AFRICAN BUSH TEA SEED (Hyptis suaveolens Poit.) FOR THE CONTROL Of COWPEA BEETLE (Callosobruchus maculatus Fabricius).

Musa, A. K.

Department of Crop Protection, University of Ilorin. Ilorin, Nigeria.

 

 

ABSTRACT

Powdered seeds of Hyptis suaveolens Poit. (Labiatae) were extracted with methanol at 64-650 C in Soxhlet extraction unit.  The extract was placed over a water bath at 600C to evaporate the methanol which was used as solvent.  Newly emerged adults of Callosobruchus maculatus F. (about 2-day old) were used in the evaluation of the toxicity of this extract.  Different concentrations obtained by diluting the extract with acetone were prepared for use.  The experiment was conducted in the laboratory at 25 + 20 C and 70 + 5% relative humidity.  At all concentrations the extract had significant effect (P < 0.05) on C. maculatus compared to the extract-free control (acetone alone).

                                                                                                       

Key words:  Callosobruchus maculatus, evaluation, Hyptis suavolens, methanolic

                       extract.

Full Article (65.19Kb) | All Articles in Volume 7.2
 
 

Date:20/11/2018
 
     
 
 
 
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