Jason Gem L. Villaruel, Jerry N. Monana, Jr. (February 2000)
Philippine Science High School Western Visayas Campus – Department of Science and Technology (DOST-PSHS WVC), Brgy. Bito-on, Jaro, Iloilo City 5000, Philippines
ABSTRACT
The experiment was conducted to test the chemical properties native only to the Tubang Bakod plant. These chemical properties have a potential to affect pests, especially mosquitoes. The experiment was conducted to exploit these potential using different concentration ratios of extra-powder-water solutions to find out if the chemicals were indeed effective. The solution from Tubang Bakod seeds were extracted and mixed with water in different ratios. The Tubang Bakod leaves were powdered and also mixed with water also in different ratios. The last solutions was mixture of the seed extract, leaf powder, and water. This was to test if they contain such chemicals and to determine which of the three was most effective as an insecticide.
The solutions in comparison with each other, showed significant difference in the mean of mosquitoes that were rendered unconscious. There was no significant difference among the solutions in terms of mosquito mortality rate. With regards to the number of mosquitoes that rendered unconscious, solution 75% seed extract-25% water had the highest mean of 7.25 among the solutions though this did not have a significant difference compared to solution 50% seed extract-25% leaf powder-25% water, which had a mean number of 7.00 mosquitoes rendered unconscious. Both solutions had the highest seed extract ratio among the other solutions.
The solutions were less effective compared to the commercial insecticide. The solutions were not able to affect the test organisms the way Baygon affected it. Though the solutions had an affect to the mosquitoes, it was too weak to be able to eliminate them.