Toxicity of Taro Plant Leaves, Colocacia esculanta, Against the German Cockroach, Blattella germanica

Reda, F. A.Bakr; Ibrahim, Abd Elwahab A.; El-Monairy, Olfat M.; El-Sayed, Yasser A.; Hegazy, Maysa

doi:10.21608/eajbsf.2017.17042

Toxicity of Taro Plant Leaves, Colocacia esculanta, Against the German Cockroach, Blattella germanica

Document Type : Original Article

Authors

¹ Department of Entomology, Faculty of Science, Ain Shams University

² Biology Department, Faculty of Science,Bisha University, Bisha, KSA

³ Entomology Department, Faculty of Science, Benha University, Qaluobiya, Egypt

10.21608/eajbsf.2017.17042

Abstract

The toxicity of Colocacia esculanta leaves extracts on adult males and females of Blattella germanica cockroaches under laboratory conditions was investigated in Benha City, Egypt. Bioassays showed that ethanol and petroleum ether extracts had a toxic effect against the tested insects and mortality percentage for adult males and females increased with the increase in the concentration. The LC₅₀values indicated that males were more sensitive to both extracts than females and ethanol extract was more toxic than petroleum ether extract. At 48h post-treatment, the LC₅₀ values of ethanol extract were 2.42 and 4.001% for treated males and females, respectively, while that of petroleum ether extract were 4.42 and 5.46%, respectively.

Keywords