ELLA MAE LOSAÑES, MARY JANILEE ZULLA (FEBRUARY 2004)
Philippine Science High School Western Visayas Campus – Department of Science and Technology (DOST-PSHS WVC), Brgy. Bito-on, Jaro, Iloilo City 5000, Philippines
ABSTRACT
This study was conducted to determine the pesticidal effect of increasing concentrations of tobacco leaf extracts on three different kinds of garden pests: black beetle, mongo fly, and orange beetle. The extracts tested were 50g of tobacco leaves in 300ml of water, 75 g in 300 ml and 100g in 300ml.
To prepare different concentrations of extracts, shredded tobacco leaves were digested in 300ml of water per treatment and were distilled until a 100 ml of the product was collected from each. The three different concentrations of insecticide were then tested on three garden insects to determine its insecticidal effect. Ten insects with three replicates were used for each treatment.
The result of the study showed that the three concentrations of insecticide were effective in killing the mongo fly and orange beetle while the black beetle was eradicated effectively in this study using the 75g and 100g concentrations and was otherwise when used with the 50g concentration. One Way Analysis of Variance (a 0.5) showed that there is no significant difference in the insecticidal effect of increasing concentrations of tobacco leaf extracts on mongo fly, orange beetle and black beetle.