Antifeedant Activities of Organic Fractions from Cestrum parqui Leaves on the Red-Haired Bark Beetle Hylurgus ligniperda

Abstract

Hylurgus ligniperda is one of the most important quarantine forest insects associated to pine (Pinus radiate D. Don) logs exported from Chile. Methyl bromide fumigation has been the prominent control method. As the use of this synthetic insecticide leads to serious environmental problems, research to find alternative treatments is urgently needed for the Chilean forestry sector. Hence, plant secondary metabolites have been considered as an alternative for its control. Therefore, the objective of this work was to assess the feeding behavior of H. ligniperda through the artificial diet supplemented with organic fractions obtained from Cestrum parqui leaves. Organic extracts were obtained using a Soxhlet extraction. Non-choice tests were developed for testing the antifeedant activity shown by the organic fractions on adults, and 5th and 6th instar larvae of H. ligniperda. All the extracts tested elicited a decrease in the weight of unsexed H. ligniperda adults, and the effects were dose-dependent. Male beetle weight gain was reduced strongly by chloroform extracts and ethyl acetate elicited a weight increase of female and from the fifth and sixth instar larvae weight. Saponin extract elicited a reduction of the weight in male and female. Finally, the weight of both instar larvae was reduced by chloroform and saponin extract. C. parqui leaf extracts show a great potential for being used for controlling H. ligniperda and thus to diminish the use of harmful synthetic pesticide.

Insecticidal capacity of Cestrum parqui (Solanaceae) leaf extracts on Xanthogaleruca luteola (Coleoptera: Chrysomelidae) adults

“…However, its effectiveness on Coleoptera, as far as we know, has been proven only three in species (Tenebrionidae: Tribolium castaneum Herbst, 1797) (Rafael et al 2000), (Tenebrionidae: Tribolium confusum Jac. 1863) (Chaieb et al 2006), and (Curculionidae: Hylurgus ligniperda Fabricius, 1787) (Huanquilef et al 2020) so this is the first report on a Chrysomelidae.…”

Inhibition of Soybean 15-Lipoxygenase and Human 5-Lipoxygenase by Extracts of Leaves, Stem Bark, Phenols and Catechols Isolated From Lithraea caustica (Anacardiaceae)

“…Extracts were obtained following the methodology described by Huanquilef et al, (2020) with some modifications.…”

Biologically Active Saponins of Genus Cestrum L.: A Comprehensive Review

“…CSE of C. parqui L'Hér showed a strong larvicidal activity against Culex pipens offering a safer and more active solution, to compete this pest, rather than synthetic insecticidal agents which the mosquitoe acquired resistance against them [49]. It also exhibited a cidal effect against various larval stages of Hylurgus ligniperda that infect pine logs exported from Chile causing great economic loss, and thus offers a safer and more environment friendly alternative for methyl bromide fumigation [50].…”