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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 18, No. 4, 2014, pp. 577-581
Bioline Code: ja14076
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 18, No. 4, 2014, pp. 577-581

 en Antifeedant and Toxic Effect of Crude Extract from Flourensia oolepis check for this species in other resources and their Impact on Nutritional Parameters of Helicoverpa gelotopoeon check for this species in other resources
SEMINARA, CECILIA; BOLLATI, LUCIANA; AVALOS, SUSANA; DIAZ NAPAL, GEORGINA; PALACIOS, SARA M. & DEFAGÓ, MARÍA T.

Abstract

Botanical insecticides are one of the environmentally acceptable options for pest management. Extract of Flourensia oolepis check for this species in other resources (known as chilca), a plant endemic to the province of Córdoba, Argentina, has shown insecticidal activity. The aim of this work was to study the effect of crude extract of this F. oolepis on the nutritional parameters of Helicoverpa gelotopoeon check for this species in other resources , a polyphagous species recently reported as one of the most serious pests of chickpea. 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 with extract (1 to 5%), with controls (water and acetone). We used three third instar larvae per replica and 8 repetitions of each. The variables measured were: consumption, fresh and dry weight of larvae, of feces and of the leaves given every 48 hours. We calculated the feeding inhibition and nutrition indices, and survival. In choice bioassays using the 10% dose, larvae preferred the control leaves, with the extract acting as a feeding inhibitor (92%). In the nochoice test, leaf consumption was markedly reduced with extract, affecting larval growth in a dose-dependent manner (p < 0.05), as well as feed utilization and lepidoptera survival.

Keywords
Helicoverpa gelotopoeon; Flourensia oolepis; Botanical insecticides; Pest; Food utilization

 
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