Baseline susceptibility and frequency of resistance to diamide insecticides in Helicoverpa armigera (Lepidoptera: Noctuidae) populations in Brazil

Pereira, Rogério Machado; Neto, Dyrson Abbade; Amado, Douglas; Durigan, Mariana Regina; Franciscatti, Rodrigo Andrade; Mocheti, Marcelo; Omoto, Celso

doi:10.1016/j.cropro.2020.105266

Cited by 25 publications

(32 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In contrast, low levels of resistance to spinosad were reported in Pakistan [71] and populations of H. armigera from two intensive cotton growing areas in India [72]. The results in our study are similar to Pereira's [73], who found two-fold variations in the susceptibility to spinosad among different populations of H. armigera in Brazil, thus suggesting low levels of resistance; unfortunately, after a few years of exposure, resistance increased, resulting in a 22% survival (LC 99 ). Helicoverpa zea susceptibility to spinosad is also variable by population.…”

Section: Discussionsupporting

confidence: 82%

Comparative Toxicity of Helicoverpa armigera and Helicoverpa zea (Lepidoptera: Noctuidae) to Selected Insecticides

Silva

Trujillo

Bernardi

et al. 2020

Insects

View full text Add to dashboard Cite

Until recently, the Old World bollworm (OWB) Helicoverpa armigera (Hübner) and the corn earworm Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) were geographically isolated. Both species are major pests of agricultural commodities that are known to develop insecticide resistance, and they now coexist in areas where H. armigera invaded the Americas. This is the first study to compare the susceptibility of the two species to conventional insecticides. The susceptibility of third instar H. armigera and H. zea larvae to indoxacarb, methomyl, spinetoram, and spinosad was determined using a diet-overlay bioassay in a quarantine laboratory in Puerto Rico. Mortality was assessed at 48 h after exposure for up to eight concentrations per insecticide. Spinetoram exhibited the highest acute toxicity against H. armigera, with a median lethal concentration (LC50) of 0.11 µg a.i./cm2, followed by indoxacarb and spinosad (0.17 µg a.i./cm2 for both) and methomyl (0.32 µg a.i./cm2). Spinetoram was also the most toxic to H. zea (LC50 of 0.08 µg a.i./cm2), followed by spinosad (0.17 µg a.i./cm2) and methomyl (0.18 µg a.i./cm2). Indoxacarb was the least toxic to H. zea, with an LC50 of 0.21 µg a.i./cm2. These findings could serve as a comparative reference for monitoring the susceptibility of H. armigera and H. zea to indoxacarb, methomyl, spinetoram, and spinosad in Puerto Rico, and may facilitate the detection of field-selected resistance for these two species and their potential hybrids in areas recently invaded by H. armigera.

show abstract

Section: Discussionsupporting

confidence: 82%

Comparative Toxicity of Helicoverpa armigera and Helicoverpa zea (Lepidoptera: Noctuidae) to Selected Insecticides

Silva

Trujillo

Bernardi

et al. 2020

Insects

View full text Add to dashboard Cite

show abstract

“…However, due to H. armigera having low susceptibility to Vip3Aa20, Leite et al [19] highlight that it is extremely important to monitor the susceptibility of H. armigera populations, when crops such as cotton are expressing Vip3Aa20 protein. Although Bt crops can reduce the insecticide sprays to control lepidopteran pests [20,21], on average, in Brazil, it is still necessary to spray insecticides 7 to 9 times in cotton [22]. As a result, S. frugiperda and H. armigera, in some regions in Brazil, have rapidly evolved resistance to new insecticides, such as diamides [22,23].…”

Section: Introductionmentioning

confidence: 99%

“…Although Bt crops can reduce the insecticide sprays to control lepidopteran pests [20,21], on average, in Brazil, it is still necessary to spray insecticides 7 to 9 times in cotton [22]. As a result, S. frugiperda and H. armigera, in some regions in Brazil, have rapidly evolved resistance to new insecticides, such as diamides [22,23].…”

Section: Introductionmentioning

confidence: 99%

Shifts in Ecological Dominance between Two Lepidopteran Species in Refuge Areas of Bt Cotton

Malaquias

Santana

Degrande

et al. 2021

Insects

Self Cite

View full text Add to dashboard Cite

Competition behavior involving agricultural pest species has long been viewed as a powerful selective force that drives ecological and phenotypic diversity. In this context, a Game Theory-based approach may be useful to describe the decision-making dilemma of a competitor with impacts to guarantee its superiority in terms of ecological dominance or sharing of the food resource with its competitor. In an attempt to elucidate the consequences of competitive dynamics for the ecological dominance of these species in refuge areas of Bt cotton, we conducted a study that was divided into two parts. The first study consisted of an evaluation of interactions involving Spodoptera frugiperda (JE Smith, 1797) and Helicoverpa armigera (Hübner, 1808) on non-Bt cotton plants in a field trial. In the second study, we explored the data matrix collected in the field to parameterize a model of Cellular Automata (CA) with update rules inspired by Game Theory. Computer simulations were analyzed in hypothetical scenarios involving the application (or not) of insecticides in the refuge areas in combination with the resistance factor of one or both pest species to the insecticides used in the refuge areas. H. armigera had superior competitive performance in relation to S. frugiperda only at high densities. According to the density-mediated shift in dominance of the species, the resistance of S. frugiperda to insecticides is seen as a risk factor for the production of susceptible individuals of H. armigera on a large scale in the refuge areas. Additionally, S. frugiperda insecticide resistance may potentially impact the resistance evolution of the H. armigera population to Bt cotton. Thus, ecological dominance could diverge by the presence of a resistance allele to insecticides with interspecific competition perhaps subordinate to evolutionary processes.

show abstract

“…Additionally, significantly reduced susceptibilities to chlorantraniliprole have been observed in the field populations throughout crop seasons, with surviving rates increasing from 0% in 2014 to as high as 29.59% in 2018. 40 Thus, the inappropriate use of chlorantraniliprole appears to have led to the development of resistance.…”

Section: Introductionmentioning

confidence: 99%

Broflanilide effectively controls Helicoverpa armigera and Spodoptera exigua exhibiting diverse susceptibilities to chlorantraniliprole and emamectin benzoate

Tang

Wang

et al. 2020

Pest Management Science

View full text Add to dashboard Cite

BACKGROUND The cotton bollworm, Helicoverpa armigera (Hübner), and the beet armyworm, Spodoptera exigua (Hübner), are two major polyphagous lepidopteran pests of cultivated crops. They develop various levels of resistance to many frequently applied broad‐spectrum insecticides. Here, the larval susceptibilities of a laboratory population and six field‐collected populations per pest from Hunan Province, China to three insecticides were determined using a standard leaf‐dipping method in the laboratory. Field‐plot trials were conducted to verify the control efficacies of broflanilide 100 g L−1 suspension concentrate (SC), chlorantraniliprole 5% SC and emamectin benzoate 5.7% water‐dispersible granule, against H. armigera and S. exigua larvae using foliar sprays in 2013 and 2019. RESULTS Variations among H. armigera and S. exigua field populations in their susceptibility levels to the three insecticides were observed in Linli, Yueyang and Changsha counties from 2013 to 2019. They were still high susceptibility to broflanilide only, but developed low and/or moderate levels of resistance to chlorantraniliprole and emamectin benzoate. In addition, broflanilide at 25 g ha−1 provided an excellent control efficacy of 81.92% to 96.46% against these pests during the 3–14‐days period after treatment in both years, whereas chlorantraniliprole at 50 g ha−1 and emamectin benzoate at 4.5 g ha−1 exhibited significantly decreased efficacies, which were consistent with their corresponding toxicity levels. CONCLUSIONS These results suggest that broflanilide should be an important new tool for the effective control of diamide‐ and avermectin‐resistant H. armigera and S. exigua. © 2020 Society of Chemical Industry

show abstract

Baseline susceptibility and frequency of resistance to diamide insecticides in Helicoverpa armigera (Lepidoptera: Noctuidae) populations in Brazil

Cited by 25 publications

References 38 publications

Comparative Toxicity of Helicoverpa armigera and Helicoverpa zea (Lepidoptera: Noctuidae) to Selected Insecticides

Comparative Toxicity of Helicoverpa armigera and Helicoverpa zea (Lepidoptera: Noctuidae) to Selected Insecticides

Shifts in Ecological Dominance between Two Lepidopteran Species in Refuge Areas of Bt Cotton

Broflanilide effectively controls Helicoverpa armigera and Spodoptera exigua exhibiting diverse susceptibilities to chlorantraniliprole and emamectin benzoate

Contact Info

Product

Resources

About