Marianne P. Aguila, Happy Rizalina M. Guevara, Marie Emerose A. Manuel ( 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
This study determined whether or not tobacco leaves had an insecticidal effect on brown planthopper bugs ( Nilaparvata lugens Sta. ). It was hypothesized that there was no significant difference in the effectiveness of the insecticide from tobacco leaves when the extract water concentration was 1:3;, 1:2, 1:1; and effectiveness of the insecticide, methyl parathion. Statistical tools employed were the t test, One way Analysis of Varriance, and the Scheffe test.
Results showed that tobacco leaves had an insecticidal effects on brown planthohopper bugs and that there was no solution when the concentration was 1:3, 1:2, and 1:1. Also, although tobacco leaves had an insecticidal effect, they where still considered inferior to the commercially made one for there was a significant difference in the effectiveness of the insecticide from tobacco leaves compared with methyl parathion.