Abstract

Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) is one of the most prevalent stored-product insect pests in Pakistan. It feed on those grains only, which have already been damaged by primary pest. To check the efficacy of different essential oil repellency behavior, Experiment was conducted in the Toxicology Laboratory, Department of Agricultural Entomology, University of Agriculture, Faisalabad, Pakistan, to determine the efficacy of oil extracted from extraction of Eucalyptus camaldulensis and Piper nigrum in various concentrations that is 20, 40 and 60% for the suppression control of red flour beetle under laboratory conditions. The incubator was maintained at 30 ± 2°C and 65 ± 5% R.H. The experiment was laid in completely randomize design. The results showed that higher concentration of plant extracted is in the form of essential oils resulted in maximum repellency at maximum exposure period as compared to minimum oil concentrations at minimum exposure period. Furthermore, it was also observed that E. camaldulensis proved more effective as compared to P. nigrum at all the concentrations as well as at all the post treatment interval.

Key words: Tribolium castaneum, Eucalyptus camaldulensis, Piper nigrum, repellency, wheat flour.