Antifeedant and Toxic Effect of Crude Extract from Flourensia oolepis and their Impact on Nutritional Parameters of Helicoverpa gelotopoeon

Journal of Applied Sciences and Environmental Management

DIAZ NAPAL, GEORGINA¹  , MAR¹  PALACIOS, SARA M.¹  SEMINARA, CECILIA¹  #205¹  DEFAG¹  A T.¹  AVALOS, SUSANA¹  BOLLATI, LUCIANA¹  #211¹ 

关键词: Helicoverpa gelotopoeon;    Flourensia oolepis;    Botanical insecticides;    Pest;    Food utilization;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

Botanical insecticides are one of the environmentally acceptable options for pestmanagement. Extract of Flourensia oolepis (known as chilca), a plant endemic to the provinceof Córdoba, Argentina, has shown insecticidal activity. The aim of this work was to study theeffect of crude extract of this F. oolepis on the nutritional parameters of Helicoverpa gelotopoeon , a polyphagous species recently reported as one of the most serious pests ofchickpea. Choice tests were conducted using different doses of extract (1 to 10%) and acetone(control), and no-choice tests, feeding larvae for 10 days with chickpea leaves treated withextract (1 to 5%), with controls (water and acetone). We used three third instar larvae perreplica and 8 repetitions of each. The variables measured were: consumption, fresh and dryweight of larvae, of feces and of the leaves given every 48 hours. We calculated the feedinginhibition and nutrition indices, and survival. In choice bioassays using the 10% dose, larvaepreferred the control leaves, with the extract acting as a feeding inhibitor (92%). In the nochoicetest, leaf consumption was markedly reduced with extract, affecting larval growth in adose-dependent manner (p < 0.05), as well as feed utilization and lepidoptera survival.

【 授权许可】

Unknown