Laboratory evaluation of the effects of Manilkara subsericea (Mart.) Dubard extracts and triterpenes on the development of Dysdercus peruvianus and Oncopeltus fasciatus. Issue 2 (30th August 2012)

• Record Type: Journal Article
• Authors: Fernandes, Caio P; Xavier, Alexandre; Pacheco, João Pedro Furtado; Santos, Marcelo Guerra; Mexas, Rodrigo; Ratcliffe, Norman A; Gonzalez, Marcelo Salabert; Mello, Cícero Brasileiro; Rocha, Leandro; Feder, Denise
• Is Part Of: Pest management science. Volume 69:Issue 2(2013:Feb.)
• Page Start: 292
• Page End: 301
• Publication Date: 2012-08-30
• Subjects: Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.3388
• Languages: English
• ISSNs: 1526-498X

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p> <bold>BACKGROUND: Studies were carried out to evaluate the effects of <italic>Manilkara subsericea</italic> extracts and triterpenes on the development of two species of agricultural pest insects, <italic>Oncopelus fasciatus</italic> and <italic>Dysdercus peruvianus</italic>.</bold> </p> <p> <bold>RESULTS: All treatments of insects with <italic>M. subsericea</italic> extracts induced mortality, delayed development and inhibited moulting. Some extracts assayed (FH, FB and FD in <italic>D. peruvianus</italic>, and FH, FB and FEA in <italic>O. fasciatus</italic>) also produced body deformities in the few adults that emerged. Other extracts (FH, FEA, FB, FD and LET in both insects), however, induced either permanent (overaged) or extranumerary nymphs, both of which were unable to achieve the adult stage and reproductive status. The insects were also treated with triterpenes (α‐ and β‐amyrin acetates) which showed high lethality at 30 days after treatment and delayed the intermoult period so that overaged nymphs were detected.</bold> </p> <p> <bold>CONCLUSION: The results indicate that extracts and triterpenes from <italic>Manilkara subsericea</italic> act as potent growth inhibitors of phytophagous hemipteran nymphs. It is also concluded that the mixture of several different molecules in the extracts used produces synergic effects that do not occur after using the triterpenes (PFT) alone. These secondary metabolites in the <italic>M. subsericea</italic> extracts can potentially be used in integrated control programmes against crop pests. Copyright © 2012 Society of Chemical Industry</bold> </p> </abstract>