The document summarizes an experiment to test the efficiency of lemon grass and kaffir lime extracts at eliminating Rhyzopertha dominica weevils. It describes 3 steps: 1) preparing Thai herbs and weevils, 2) extracting the essential oils from the herbs via steam distillation, and 3) testing the extracts at 5 concentrations by counting dead weevils over time and comparing to a distilled water control. The goal was to determine if the Thai herb extracts could effectively eliminate the weevil pests.
5. Methods Chop Thai herbs in to a small size Prepare weevils ( Rhyzopertha dominica )
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7. Methods Keep the oil (the extract) in a bottle and put it in a refrigerator.
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9. Methods Dilute the essential oil to 5 concentrations : 10% 20% 30% 40% 50% Spray the solutions in to the plates that we prepared Distilled water were used as a control.
10. Methods Dead weevil in each plate were counted every 15 minutes. Keep the number of it. Each treatment w as replicated three times before changing the herbs
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