Plants have already been in this world for over 400 million years. Their existence for millions of years will not be possible if they did not develop protection mechanisms, such as, insecticidal effects. Head lice are small insects which feed on blood meal. These are flightless and contracted via head to head contact, or from shared belongings. Head lice infestation is a common problem in tropical countries like the Philippines. Common to grade school students due to climate, culture, family size, and personal hygiene. This study aimed to determine the percent mortalities of the different concentrations of experimental and control groups, as well as, the significant difference across and in between the experimental groups.
Based from the findings of the study, Caimito leaf extracts in different concentrations (5%, 10%, 15%, and 20%) resulted to mortality of head lice. Among the experimental groups, the 5% had the lowest pediculicidal effect, while the 20% had the greatest pediculicidal effect. The positive control group which is consisted of 20% benzyl benzoate 25% (w/v) had the greatest pediculicidal effect while the negative group, distilled water, had no effect on the head lice. The percent mortality difference across experimental concentrations showed that there was a significant median percent mortality difference across the experimental concentrations at 0.05 level of significance, H(3) = 58.751, p < 0.05. Therefore, there was a significant difference across groups. Between the concentrations, 5% and 15% concentration, and 15% concentration and 20% concentration had the same pediculicidal effect, meanwhile, 5% and 15% concentration, 5% and 20% concentration, 10% and 15% concentration, and 10% and 20% concentration d the different pediculicidal effect. The 5% concentration and 10% concentration of Caimito leaf extracts had the least pediculicidal effect on head lice, while the 15% concentration and 20% concentration had the greatest pediculicidal effect on head lice.
The proponents of this study concluded that the Caimito leaf extract in different concentrations (5%, 10%, 15%, and 20%) had a pediculicidal effect on head lice. It was recommended to test the Caimito leaf extract on the nymphs and nits; to treat the pubic lice, and body lice other than head lice; to conduct a phytochemical screening and determine the active ingredients present in the Caimito leaf extract; to improve by adding other plant extracts that were proven to have insecticidal properties; and to determine how the Caimito leaf extract's active ingredient affect the head lice which lead to its mortality.
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