author(s)
Shakera Tun Noor Nova, Jhuma Mahboba, Md. Abdul Alim and Biplab Kumar Mandal

abstract
The responses of adult Red Flour Beetle, Tribolium castaneum (Herbst.) to the dry leaf dust of Neem (Azadirachta indica) and Jarul (Lagerstroemia speciosa) in wheat as repellants were observed. The research was carried out from January to October 2013, in the laboratory condition at the Entomology Laboratory, Department of Zoology, Jagannath University, Dhaka, Bangladesh. Three different doses viz. 0.1gm, 0.2gm and 0.3gm of dry leaf dust of two plants- A. indica and L. speciosa and a mixed dust of the two at 1:4 (w/w) ratio were used against 10 adult pests living in 20gm of wheat, and the number of repelled insects were checked after 48 to 72 hours. For the whole study, 105 such experiments were performed and a group of 5 experiments were taken into count as a single replication. Dust of Jarul leaves (0.3gm) was the most effective repellant against the red flour beetles, followed by Neem (0.3gm), Jarul (0.2gm) and mixed application (0.3gm). The highest of 34.5% repellency was recorded; significant variations were found in the percentage of repelled insects between almost all possible doses, and different doses with controls. Though higher doses showed better repellency, huge research is needed to know whether a higher dose could make harm to the food value of the corns or not; before prescribing them against red flour beetles for storage management of wheat.