An effective repellent for rodent-proof cardboard-container is considered interesting especially in packagingand transport business as rat usually gnaws through the container, resulting in food deterioration or goods loss.Rodenticide usage is a common approach for rodent control; however, most rodenticides are poisonous to man aswell as to the rats. Therefore, preferably the usage of non-toxic rat repellent is an interesting alternative. In this study,various natural extracts, i.e. wintergreen oil, chilli, peppermint oil, bergamot oil and geranium oil, which had beenshown to repel rats when apply singly or in combination, were mixed with ink, coated on cardboard before beingplaced in circular open field with rats for 24 hours. In this study, two forms of application were used which werecoating the whole cardboard and coating the cardboard as a striped-like manner. We found that the number of visitsto the tested core and the time the rats spent near the tested core were significantly lower in the rats exposed to theink and bergamot oil formula when compared to those exposed to blank cardboard, which was the control group, inboth forms of application. However, the behaviors of the rats exposed to the ink, chilli and wintergreen oil formulaand the ink, peppermint oil and wintergreen oil formula were not different from those of the control group. We can,therefore, conclude that ink in combination with bergamot oil alone, with bergamot oil, wintergreen oil andpeppermint oil, and with bergamot oil and geranium oil have a potential for using as a rat repellent when applied ontransporting packages.
Faculty of Veterinary Science, Chulalongkorn University
Kalandakanond-Thongsong, Sarinee; Daendee, Suwaporn; Thongsong, Boonrit; and Chavananikul, Vivat
"Evaluation of Cardboard Coated with Natural Substances in Combination with Ink on Rat Repellency,"
The Thai Journal of Veterinary Medicine: Vol. 41:
2, Article 11.
Available at: https://digital.car.chula.ac.th/tjvm/vol41/iss2/11