Beyond selectivity: Are behavioral avoidance and hormesis likely causes of pyrethroid-induced outbreaks of the southern red mite Oligonychus ilicis?

dc.creatorCordeiro, E.M.G.
dc.creatorMoura, I.L.T. de
dc.creatorFadini, M.A.M.
dc.creatorGuedes, R.N.C.
dc.date2018-05-10T18:23:16Z
dc.date2018-05-10T18:23:16Z
dc.date2013-07-03
dc.date.accessioned2023-09-27T22:02:21Z
dc.date.available2023-09-27T22:02:21Z
dc.identifier0045-6535
dc.identifierhttps://doi.org/10.1016/j.chemosphere.2013.06.030
dc.identifierhttp://www.locus.ufv.br/handle/123456789/19472
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8969815
dc.descriptionSecondary pest outbreak is a counterintuitive ecological backlash of pesticide use in agriculture that takes place with the increase in abundance of a non-targeted pest species after pesticide application against a targeted pest species. Although the phenomenon was well recognized, its alternative causes are seldom considered. Outbreaks of the southern red mite Oligonychus ilicis are frequently reported in Brazilian coffee farms after the application of pyrethroid insecticides against the coffee leaf miner Leucoptera coffeella. Selectivity favoring the red mite against its main predatory mites is generally assumed as the outbreak cause, but this theory has never been tested. Here, we assessed the toxicity (and thus the selectivity) of deltamethrin against both mite species: the southern red mite and its phytoseid predator Amblyseius herbicolus. Additionally, behavioral avoidance and deltamethrin-induced hormesis were also tested as potential causes of red mite outbreak using free-choice behavioral walking bioassays with the predatory mite and life-table experiments with both mite species, respectively. Lethal toxicity bioassays indicated that the predatory mite was slightly more susceptible than its prey (1.5×), but in more robust demographic bioassays, the predator was three times more tolerant to deltamethrin than its prey, indicating that predator susceptibility to deltamethrin is not a cause of the reported outbreaks. The predator did not exhibit behavioral avoidance to deltamethrin; however insecticide-induced hormesis in the red mite led to its high population increase under low doses, which was not observed for the predatory mite. Therefore, deltamethrin-induced hormesis is a likely cause of the reported red mite outbreaks.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherChemosphere
dc.relationVolume 93, Issue 6, Pages 1111-1116, October 2013
dc.rightsOpen Access
dc.subjectEcological backlash
dc.subjectSecondary pest outbreaks
dc.subjectInsecticide susceptibility
dc.subjectInsecticide-induced hormesis
dc.subjectInsecticide selectivity
dc.subjectIntegrated pest management
dc.titleBeyond selectivity: Are behavioral avoidance and hormesis likely causes of pyrethroid-induced outbreaks of the southern red mite Oligonychus ilicis?
dc.typeArtigo


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