Biology Departement, Faculty of Mathematics and Natural Sciences, State University of Semarang, Semarang, Indonesia.

Email: nikensubekti@mail.unnes.ac.id

Insects warehouse pests contained in commodities, especially tobacco can cause a decrease in the quantity and quality of commodities. The main pest insects found in tobacco storage warehouses are Lassioderma serricorne and Pholcus phalangioides. This study aims to analyze and compare the effectiveness of the use of fumigant storin to control insect pests Lassioderma serricorne and Pholcus phalangioides. Methods used in this study include preparation of test insects, application of fumigation, identification, calculation of mortality and analysis of data. The data were analyzed statistically using the One Way ANOVA test. The results showed that there was a significant difference in morphility between groups of test insects. Mortality is highest in the Lassioderma serricorne test insect group. This indicates that fumigant storin is very effective in controlling barn pest insects especially Lassioderma serricorne. For the control of insect pests warehouses in the future, it is recommended to use