The In Vitro Ovicidal Activity of Cassia alata Methanolic Extracts on Aedes aegypti and Aedes albopictus Eggs

Authors

  • AZLINDA ABU BAKAR School of Biological Sciences, Universiti Sains Malaysia, 11800 USM, Pulau Pinang
  • SHUKI SHUET EN LIM School of Biological Sciences, Universiti Sains Malaysia, 11800 USM, Pulau Pinang

Keywords:

Aedes mosquitoes, ovicidal activity, Cassia alata, extracts, methanolic

Abstract

The widespread use of chemical insecticides for controlling Aedes mosquitoes has resulted in the development of insecticide resistance, prompting the need for alternative solutions. Botanical insecticides have gained attention as a promising approach in modern pest control. This study focuses on evaluating the ovicidal effects of methanol extracts from Cassia alata leaves on Aedes mosquitoes. The extracts were produced through the maceration-filtration technique, followed by the preparation of various concentrations (0.05-2.00 mg/ml) These concentrations were then tested to assess their impact on the fertility and egg viability of Aedes aegypti and Aedes albopictus. From the results obtained in the bioassay on egg fertility and viability, a significant difference in fertility was observed between Ae. aegypti and Ae. albopictus (p<0.05, p = 0.044). However, no significant difference was observed in overall egg viability between the two species (p>0.05, p = 0.468). The LC50 and LC90 values for Ae. albopictus were 0.323 mg/ml and 5.280 mg/ml, respectively, which were lower than those for Ae. aegypti 0.560 mg/ml and 11.480 mg/ml. This indicates that, Ae. albopictus is more susceptible to the methanolic C. alata extracts. These findings suggest that C. alata extracts could be a viable alternative to chemical insecticides in mosquito control programs, particularly for targeting Ae. albopictus.

 

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Published

2025-06-26

How to Cite

ABU BAKAR, A. ., & LIM , S. S. E. (2025). The In Vitro Ovicidal Activity of Cassia alata Methanolic Extracts on Aedes aegypti and Aedes albopictus Eggs. Borneo Journal of Resource Science and Technology, 15(1), 97–104. Retrieved from https://publisher.unimas.my/ojs/index.php/BJRST/article/view/7706