Effects of three natural repellents – garlic, lemon and bay leaves on cockroach

Abstract

he present investigation was aimed to assess the impact of indigenous plant products for their insecticidal and repellent activity against Periplanata americana. An attempt was undertaken to evaluate the efficiency of three plant products- Citrus limon (lemon), Allium sativum (garlic) and Laurus nobilis (bay leaves), owing to their insecticidal properties. Each of the plant material (PM) was pulverized and then applied on P.americana in three different concentrations. Dosages administered were 10 ml, 20ml and 30ml respectively. The results have shown that lemon was the most effective among the three natural cockroach repellents tested and it would be an excellent alternative to synthetic insectides. All the three experimented plant products showed maximum repellency in their highest concentration. But the study was not conducted further since 100 % mortality was shown in 30 ml Lemon spray. The results of the present study would provide more knowledge and information about lemon as natural repellent. Additionally, this study will produce significant and relevant information for future studies regarding to this potent insect repellent.