Abstract: This research aimed to develop and investigate the effectiveness of three hands-on practical on weed control using plant extracts for undergraduates, compare gains of students science process skills between before and after learning with the practical and investigate students preferences towards learning with the practical. The subjects, sampled by using the purposive method were 30 undergraduates from the Department of Biology, Srinakharinwirot University. The research tools consisted of three hands on practicals of the use plant extracts to control the weeds for undergraduates, a 40 multiple choice questions of science process skills with 4 options and a thirty items of 5-rating Likert preferences towards learning with the practicals. The data were analyzed by the descriptive statistics and t-test for independent samples. The findings indicated students science process skills after learning with the practical had significantly higher than those before learning with the practical (p>0.05). Students preferences towards learning with the hands on practical were at the high level of 4.21±0.34. Therefore, this hands on practicals can assist students to understand the plant sciences, particularly the plant extract use for weed control.
Boonrod Chatiyanon, Tawatchai Tanee, Chusri Talubmook and Chalermchai Wongwattana, 2013. Developing Hands on Practicals on Weed Control Using Plant Extracts for Undergraduates. Pakistan Journal of Social Sciences, 10: 72-75.