Bioactivity of the aqueous extracts of chilli pepper and eucalyptus leaves on Zabrotes subfasciatus in fava beans
Journal Title: Revista Verde de Agroecologia e Desenvolvimento Sustentável - Year 2017, Vol 12, Issue 2
Abstract
The plant extracts currently represent an important alternative in the control of insect pests. The objective of this paper was to analyze the effects of aqueous extracts of leaves of chilli pepper (Capsicum frutescens) and eucalyptus (Eucalyptus sp.) on Zabrotes subfasciatus in fava. Two bioassays were performed in the entomology laboratory, Department of Biology, Nature Sciences Center of the Federal University of Piauí, in a completely randomized experimental design, totaling five treatments [(0% (control), 30%, 60%, 80% and 100%], each one with four replicates, where the parameters, number of dead insects, number of eggs and emergence of adults were evaluated. The aqueous extract of leaves of chilli pepper was not efficient against the weevil Z. subfasciatus, because, there was an average mortality of 20% of the insects in the concentrations of 80 and 100%, and with the increase of the concentration there was a stimulus to oviposition and emergence. The aqueous extract of leaves of Eucalyptus sp. was efficient on the mortality, oviposition and emergence of Z. subfasciatus, with the increase in concentration, a higher mortality was observed, reaching 40% of the individuals; reduction of oviposition, 13% in relation to control and other concentrations, and emergence of beetles.
Authors and Affiliations
Aline Amanda Sampaio, Lúcia da Silva Fonte, Douglas Rafael e Silva Barbosa, Vânia Maria Gomes da Costa Lima
Keywords
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- EP ID EP253605
- DOI 10.18378/rvads.v12i2.4695
- Views 128
- Downloads 0
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