Toxicity of the ethanol extract of Magonia pubescens on larvae Aedes aegypti

Revista da Sociedade Brasileira de Medicina Tropical

Silva, Ionizete Garcia da¹  Arruda, Walquíria¹  Universidade Federal de Goiás, Goiânia¹  Oliveira, Gláucia Maria Cavasin¹ 

关键词: Aedes aegypti;    Magonia pubescens;    Midgut;    Larvae;    Toxicity;   

DOI  :  10.1590/S0037-86822003000100004

学科分类：农业科学（综合）

来源: Sociedade Brasileira de Medicina Tropical

【 摘 要 】

Crude ethanol extracted from Magonia pubescens trunks was utilized to prove its effect in the intestinal tract of Aedes aegypti 3rd instar larvae. Exposure times (2, 4, 6, 8, 10, 12, and 13 hours) were tested to verify when the morphological alterations begin to occur, in the intestinal tract of the larvae. The toxic effect of the extract was mainly in the midgut, beginning at the anterior midgut and followed through to posterior midgut. The main alterations observed were partial or total cell destruction, high citoplasmatic vacuolization, increase of subperitrophic space, cell hypertrophy and the epithelium did not maintain its monolayer appearance. The alterations began after four hours of exposure to M. pubescens extract. Observations of tissue sections from larvae treated for different lengths of time revealed a wide variation in the degree of damage between exposure periods and midgut larvae region. The present study provides evidence regarding the mode of action of the M. pubescens extract and suggests its potential utilization as a larvicide to control Aedes aegypti mosquito.

【 授权许可】

Unknown