Oligonychus punicaeas a pest ofEucalyptus urophyllain cultivation and potential new host species in Brazil

Ferraz, José Cláudio Barros; Silva, Paulo R. R.; Amaranes, Matheus Pinheiro; Santos, Mayara Fernandes dos; Melo, José Wagner da Silva; Lima, Debora B.; França, Solange Maria de

doi:10.1080/01647954.2018.1543349

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…Each egg was evaluated for up to 4 days, eggs that did not hatch during this period were considered unviable. The data collected in the first 10 days of the experiment were used to estimate the instantaneous growth rate ( ri ) of N. barkeri exposed or not exposed to acaricides, which was calculated (Amaral et al., 2019; Ferraz et al., 2019). This parameter was estimated using the equation: ri = ln (N f /N 0 )/Δt, where N f is the final number of mites, N 0 is the initial number of mites, and Δt is the time interval between the beginning and the end of the bioassay (Stark et al., 1997; Walthall & Stark, 1997).…”

Section: Methodsmentioning

confidence: 99%

Selectivity of acaricides to Neoseiulus barkeri (Hughes) (Acari: Phytoseiidae)

Silva,

Lima,

Souza

et al. 2023

J Applied Entomology

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Neoseiulus barkeri Hughes has been used to control several pests, including the red palm mite, Raoiella indica Hirst. However, in some situations, the exclusive use of biocontrol agents is not sufficient to prevent the damage caused by pests. In these scenarios, the integration of chemical and biological controls is desired. For that purpose, the determination of selective acaricides, avoiding or reducing deleterious effects on the biological control agent is desirable. This study evaluated the lethal and sublethal effects of acaricides (abamectin, azadirachtin, fenpyroximate and pyridaben) on the predatory mite N. barkeri. We investigated the toxicity and selectivity of the acaricides and the survival, fertility, egg viability and instantaneous growth rate (ri) of N. barkeri exposed to acaricides. Additionally, we classified the acaricides according to the scale proposed by the International Organization for Biological Control (IOBC). Among the acaricides evaluated, abamectin was selective for N. barkeri because the estimated lethal concentration (LC50) for N. barkeri was higher than that for R. indica. None of the acaricides affected predator survival curves. However, azadirachtin and fenpyroximate reduced the average predator survival time. Pyridaben was the only acaricide that reduced the fertility of N. barkeri females and, consequently, their instantaneous growth rate (ri). All the acaricides affected the viability of N. barkeri eggs. Pyridaben was classified as moderately harmful, whereas other acaricides were classified as harmless.

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Section: Methodsmentioning

confidence: 99%

Selectivity of acaricides to Neoseiulus barkeri (Hughes) (Acari: Phytoseiidae)

Silva,

Lima,

Souza

et al. 2023

J Applied Entomology

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“…Santos, M. F.; Silva, P. R. R.;Amaranes, M. P.; Ferraz, J. C. B.; Briozo, M. E. O.; França, S. M. | 1080 bronzeamento das folhas, seguido de uma necrose, podendo resultar em abscisão foliar e morte das plantas (PEREIRA et al, 2005;PINTO et al, 2012;FERRAZ et al, 2019).…”

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Bioeficácia de produtos à base de nim (Azadirachta indica A. Juss.) no manejo de Oligonychus punicae (Acari: Tetranychidae) em eucalipto

et al. 2022

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Produtos naturais têm apresentado potencial no controle de artrópodes-praga, bem como para ácaros do gênero Oligonychus. Este estudo teve como objetivo avaliar a toxicidade, repelência e efeito ovicida de diferentes formulações comerciais à base de nim (Azadirachta indica A. Juss.) no controle do Oligonychus punicae (Hirst, 1926) em minijardim clonal de eucalipto. Os produtos testados foram Natural Neem®, Off-Neem®, Nim-I-GO® e Azamax®. Para avaliar a toxicidade sobre fêmeas adultas de Oligonychus punicae, foram utilizados discos foliares de eucalipto, pulverizados com diferentes concentrações de cada produto, definidas a partir de testes preliminares. A mortalidade foi avaliada 48 h após aplicação dos produtos e calculadas as concentrações letais (CL50 e CL95) para cada um. O efeito repelente foi verificado através de teste com chance de escolha, utilizando-se discos foliares tratados com os produtos e água destilada. A concentração utilizada foi a CL50 dos produtos calculada no teste de toxicidade. O efeito ovicida foi determinado a partir da aplicação das soluções preparadas com as CL95 de cada produto sobre ovos de Oligonychus punicae em discos foliares de eucalipto. As CL50 variaram entre 0,10 a 0,56% para Off-Neem® e Azamax®, respectivamente, e as CL95 de 0,71 a 1,78% para Off-Neem® e Natural Neem®. Os inseticidas Off-Neem® e Natural Neem® reduziram significativamente o número de fêmeas de Oligonychus punicae, entretanto, Azamax® e Nim-I-GO® não apresentaram uma redução significativa, embora todos tenham sido classificados como repelentes. Os ovos de Oligonychus punicae tratados com as CL95 dos produtos foram inviabilizados, não havendo eclosão. Portanto, conclui-se que os produtos naturais testados apresentaram potencial para o controle de Oligonychus punicae em virtude da significativa toxicidade sobre ovos e fêmeas adultas.

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Biocontrol Potential ofNeoseiulus californicus(Mesostigmata : Phytoseiidae) AgainstOligonychus punicae(Acari: Tetranychidae) in Avocado

Oliveira

Sarmento

Girardo

et al. 2021

Journal of Economic Entomology

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Oligonychus punicae (Hirst) (Trombidiformes: Tetranychidae) is a common pest in Mexican avocado orchards. Neoseiulus californicus (McGregor) (Mesostigmata: Phytoseiidae) is frequently found associated with avocado orchards in Mexico and may be an important aid for controlling O. punicae. Given the lack of information in the scientific literature, this study evaluated the predation and oviposition of N. californicus when fed O. punicae at different developmental stages in a no-choice experiment. We also assessed fluctuations in the population size of O. punicae and N. californicus in commercial avocado orchards; correlations among mite density and air temperature, humidity, and precipitation in commercial avocado orchards; and the correlations between prey and predator populations. The no-choice test revealed that N. californicus adult females fed on O. punicae of all developmental stages, with higher levels of predation being recorded for eggs, followed by larvae. The highest oviposition values of N. californicus females were observed when females were fed O. punicae eggs. In orchards, the populations of both mites increased between February and June. The populations peaked during the warmest months of the year, with O. punicae populations peaking between June and July and N. californicus peaking in August. In addition, the population size of N. californicus was significantly and positively correlated with rainfall, air temperature, and the population densities of O. punicae. Meanwhile, O. punicae population size was positively correlated with air temperature, and the population of its predator N. californicus.

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Oligonychus punicaeas a pest ofEucalyptus urophyllain cultivation and potential new host species in Brazil

Cited by 6 publications

References 15 publications

Selectivity of acaricides to Neoseiulus barkeri (Hughes) (Acari: Phytoseiidae)

Selectivity of acaricides to Neoseiulus barkeri (Hughes) (Acari: Phytoseiidae)

Bioeficácia de produtos à base de nim (<i>Azadirachta indica</i> A. Juss.) no manejo de <i>Oligonychus punicae</i> (Acari: Tetranychidae) em eucalipto

Biocontrol Potential ofNeoseiulus californicus(Mesostigmata : Phytoseiidae) AgainstOligonychus punicae(Acari: Tetranychidae) in Avocado

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