Monitoramento e padrão de herança da resistência de &lt;i&gt;Spodoptera frugiperda&lt;/i&gt; (J. E. Smith) (Lepidoptera: Noctuidae) a spinetoram

Lira, E. da C.

doi:10.11606/d.11.2019.tde-23012019-150921

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…When compared to its precursor spinosad, the insecticide spinetoram exhibits improved efficiency and effective toxicological properties (LIRA, 2018). The results for caterpillar mortality by the insecticide spinetoram are similar with research conducted on corn crops, with control efficacy greater than 80% (GRIGOLLI, 2017).…”

Section: Resultssupporting

confidence: 58%

Control of <em>Spodoptera frugiperda</em> in different larval ínstars in soybean crops

Cezar¹,

Tomazelli²,

Bagio³

et al. 2023

Braz. J. Develop.

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Spodoptera caterpillars are emerging as significant defoliators in the soybean crop, causing significant yield losses. Among the species, Spodoptera frugiperda (Smith, 1797) (Lepidoptera: Noctuidae) stands out among the species due to its strong ability for polyphagy and migratory habits. This study sought to assess the efficacy of chemical insecticides in the control of S. frugiperda in soybean crops. The experiment was conducted in a laboratory setting with a completely randomized design using seven treatments. The applications were carried out in the field, using the soybean cultivar BMX Icon. After the natural drying of the insecticides, leaves were collected from the upper part of the plants, and these were supplied to the caterpillars in the laboratory. For lab infestations, three larval instars were used to determine mortality and leaf consumption (cm²). The results indicated that insecticides chlorfenapyr, spinetoram, chlorantraniliprole, indoxacarb + novaluron and thiamethoxam + lambda-cyhalothrin are efficient for the control of 1st instar caterpillars. Moreover, the insecticides chlorfenapyr, spinetoram, chlorantraniliprole and indoxacarb + novaluron are efficient for the control of 3rd and 5th instar caterpillars. There was no residual effect at 14 days after insecticide application.

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Section: Resultssupporting

confidence: 58%

Control of <em>Spodoptera frugiperda</em> in different larval ínstars in soybean crops

Cezar¹,

Tomazelli²,

Bagio³

et al. 2023

Braz. J. Develop.

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“…This method consists of the formation of isolines (pairs) with individuals from the field‐collected population, followed by endogamic crosses to obtain the F 2 progeny for each isoline. The bioassays were conducted using a diagnostic concentration of 5.6 μg spinetoram mL −1 . After evaluation for 48 h, the surviving larvae from each isoline were transferred to plastic containers (50 mL volume) containing artificial diet and maintained until the adults emerged.…”

Section: Methodsmentioning

confidence: 99%

Resistance of Spodoptera frugiperda (Lepidoptera: Noctuidae) to spinetoram: inheritance and cross‐resistance to spinosad

Lira

Bolzan

Nascimento

et al. 2020

Pest Management Science

103

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BACKGROUNDThe use of spinosyn insecticides is one of the major control strategies of the fall armyworm, Spodoptera frugiperda (J. E. Smith) in Brazil. In this study, we selected a spinetoram‐resistant strain from a field‐population of S. frugiperda to characterize the inheritance of the resistance and cross‐resistance relationship between spinosyn insecticides.RESULTSThe values of LC50 (95% CI) obtained from concentration–response bioassays were 0.63 (0.55–0.73) μg spinetoram mL−1 for the susceptible strain (SUS), and 1170.96 (1041.61–1323.89) μg spinetoram mL−1 for the strain resistant to spinetoram (SPT‐R). These values resulted in a resistance ratio of 1844‐fold. The SPT‐R strain showed cross‐resistance with spinosad (resistance ratio = 1196‐fold). The reciprocal crosses showed LC50 values of 3.91 (2.97–5.84) and 5.37 (4.52–6.52) μg spinetoram mL−1, suggesting that the resistance of S. frugiperda to spinetoram is autosomal and incompletely recessive. The backcrosses of the F1 progeny with the SPT‐R strain suggest a resistance with polygenic effect. Estimates of the effective number of loci with equal contributions to the resistance effect were from 1.18 to 1.76, suggesting that resistance to spinetoram is associated with a few genes.CONCLUSIONThe inheritance pattern of resistance of S. frugiperda to spinetoram was characterized as autosomal, incompletely recessive and polygenic. Cross‐resistance between spinosyns was confirmed in S. frugiperda. The importance of this information for implementing insect resistance management strategies is discussed in this paper. © 2020 Society of Chemical Industry

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Monitoramento e padrão de herança da resistência de <i>Spodoptera frugiperda</i> (J. E. Smith) (Lepidoptera: Noctuidae) a spinetoram

Cited by 2 publications

References 9 publications

Control of <em>Spodoptera frugiperda</em> in different larval ínstars in soybean crops

Control of <em>Spodoptera frugiperda</em> in different larval ínstars in soybean crops

Resistance of Spodoptera frugiperda (Lepidoptera: Noctuidae) to spinetoram: inheritance and cross‐resistance to spinosad

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