SciELO - Scientific Electronic Library Online

 
vol.23 issue1Between Open Sets and Semi-Open SetsPolyhydroxyalkanoate biosynthesis by oxalotrophic bacteria from high Andean soil author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


Universitas Scientiarum

Print version ISSN 0122-7483

Abstract

GIRALDO RIVERA, Ana Isabel; GUERRERO ALVAREZ, Gloria Edith  and  SALCEDO-REYES, Juan Carlos. Rollinia mucosa (Jacq.) Baillon (Annonaceae) active metabolites as alternative biocontrol agents against the lace bug Corythucha gossypii (Fabricius): an insect pest. Univ. Sci. [online]. 2018, vol.23, n.1, pp.21-34. ISSN 0122-7483.  http://dx.doi.org/10.11144/javeriana.sc23-1.rmjb.

The lace bug, Corythucha gossypii (Fabricius) is a serious pest affecting over 24 wild and commercially important plant species of the families Annonaceae, Passiflorcae, Caricaceae, Euphorbiaceae, and Solanaceae. Thus far, commercial insecticides, such as 0.1% Dimethoate and 0.1% Imidacloprid have shown effectiveness against this insect, but no botanical pesticides are available to control this bug. In the present study, a Rollinia mucosa (Jacq.) Baillon ethanol extract was evaluated as a biological control agent against the lace bug. Through a toxicity assay involving Artemia salina, the median lethal concentration (LC50) of a raw ethanol extract of R. mucosa seeds was determined, as well as that of its Acetogenin (F1) and Alkaloid (F2) fractions; these LC50 were 0.184, 0.082, and 0.0493 μg/mL, respectively. In addition, with an insecticide assay on lace bug nymphs, a mortality percentage of 86.67% at 5 μg/mL after 72h was observed. These data demonstrate that the R. mucosa seed extract is highly active. Further chemical characterization studies revealed that the main active metabolites contributing to extract activity were acetogenins and alkaloids.

Keywords : Acetogenins; Lace bug Corythucha gossypii; Isoquinoline alkaloids; Biocontrol; Rollinia mucosa.

        · abstract in Spanish | Portuguese     · text in English     · English ( pdf )