Soybean aphid (Hemiptera: Aphididae) response to lambda‐cyhalothrin varies with its virulence status to aphid‐resistant soybean

Valmorbida, Ivair; Muraro, Dionei Schmidt; Hodgson, Erin W.; O’Neal, Matthew E.

doi:10.1002/ps.5661

Cited by 12 publications

(7 citation statements)

References 53 publications

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“…Adding an insecticidal seed treatment to the Rag soybean (S Rt ) decreased the overall population size, but it did not significantly impact the ratio of biotype 1 to biotype 4. Previous studies have documented a fitness advantage to biotype 4 in the presence of both Rag and the insecticide lambda‐cyhalothrin 50 . Our data did not show any fitness advantage in the presence of Rag and thiamethoxam, as most early plant ages had very few biotype 4 aphids on treated Rag plants.…”

Section: Discussioncontrasting

confidence: 66%

“…Previous studies have documented a fitness advantage to biotype 4 in the presence of both Rag and the insecticide lambda-cyhalothrin. 50 Our data did not show any fitness advantage in the presence of Rag and thiamethoxam, as most early plant ages had very few biotype 4 aphids on treated Rag plants. On the refuge, our results may indicate a reduced fitness cost of biotype 4 aphids, perhaps induced by the simultaneous infestation with biotype 1 aphids.…”

Section: Insecticidal Seed Treatment Decreases Soybean Aphid Population Sizecontrasting

confidence: 59%

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Evaluating the role of insecticidal seed treatment and refuge for managing soybean aphid virulence

Esquivel

Cañas

Tilmon

et al. 2021

Pest Management Science

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BACKGROUND Managing insect virulence can extend the durability of host‐plant resistant crops. Genetically modified resistant crops continue to be successful because of insect‐resistant management strategies that delay resistance such as multiple toxins and a susceptible refuge. These strategies may also be useful for host‐plant resistant crops, but more research is needed on their applicability. We investigated the interaction between a susceptible refuge and an insecticidal seed treatment to manage virulence in the soybean aphid. We tested four scenarios of an insecticidal seed treatment (plus an untreated control) in a microcosm containing 25% aphid‐susceptible (refuge) and 75% aphid‐resistant soybeans. Independent cohorts of plants were infested every week with avirulent and virulent aphids at equal frequencies. We used a molecular marker to estimate the change in virulence frequency across different plant maturities (from 7 to 42 days after planting). RESULTS The presence of an insecticidal seed treatment on either the susceptible or resistant soybean decreased the overall population size of the soybean aphid. However, the insecticidal seed treatment impacted both virulent and avirulent aphids similarly, and only altered frequencies in favor of virulence when the sole susceptible plant (i.e., refuge) was treated. CONCLUSION Under our experimental conditions, the frequency of avirulent aphids persisted with the use of a refuge. Although an insecticidal seed treatment decreased the overall aphid population size, it did not appear to benefit virulence management. © 2021 Society of Chemical Industry.

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Section: Discussioncontrasting

confidence: 66%

Section: Insecticidal Seed Treatment Decreases Soybean Aphid Population Sizecontrasting

confidence: 59%

Evaluating the role of insecticidal seed treatment and refuge for managing soybean aphid virulence

Esquivel

Cañas

Tilmon

et al. 2021

Pest Management Science

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“…A total of 45 nymphs were transferred for SBA‐Boone‐2019, SBA‐Nashua‐2018, SBA‐MN1‐2017 and SBA‐Darwin‐2019 isofemale lines, and 43 for SBA‐Kanawha‐2019. Leaflets were replaced every seven days and the filter paper was moistened as needed 63 . Aphis glycines morphological characteristics were used to determine developmental stages 64,65 along with the presence of exuviae, which were removed once detected.…”

Section: Methodsmentioning

confidence: 99%

“…Leaflets were replaced every seven days and the filter paper was moistened as needed. 63 Aphis glycines morphological characteristics were used to determine developmental stages 64,65 along with the presence of exuviae, which were removed once detected. The developmental stages, fecundity and adult longevity were measured daily until the death of the aphid.…”

Section: Life Table Analysismentioning

confidence: 99%

Evidence of enhanced reproductive performance and lack‐of‐fitness costs among soybean aphids, Aphis glycines, with varying levels of pyrethroid resistance

Valmorbida

Coates

Hodgson

et al. 2022

Pest Management Science

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BACKGROUND Foliar application of insecticides is the main strategy to manage soybean aphid, Aphis glycines (Hemiptera: Aphididae), in the northcentral United States. Subpopulations of A. glycines have multiple nonsynonymous mutations in the voltage‐gated sodium channel (vgsc) genes that are associated with pyrethroid resistance. We explored if fitness costs are associated with phenotypes conferred by vgsc mutations using life table analyses. We predicted that there would be significant differences between pyrethroid susceptibility and field‐collected, parthenogenetic isofemale clones with differing, nonsynonymous mutations in vgsc genes. RESULTS Estimated resistance ratios for the pyrethroid‐resistant clones ranged from 3.1 to 37.58 and 5.6 to 53.91 for lambda‐cyhalothrin and bifenthrin, respectively. Although life table analyses revealed some biological and demographic parameters to be significantly different among the clonal lines, there was no association between levels of pyrethroid resistance and a decline in fitness. By contrast, one of the most resistant clonal lines (SBA‐MN1‐2017) had a significantly higher finite rate of increase, intrinsic rate of increase and greater overall fitness compared to the susceptible control and other pyrethroid‐resistant clonal lines. CONCLUSIONS Our life history analysis suggests that there are no negative pleotropic effects associated with the pyrethroid resistance in the clonal A. glycines lines used in this study. We discuss the potential impact of these results on efficacies of insecticide resistance management (IRM) and integrated pest management (IPM) plans directed at delaying the spread of pyrethroid‐resistant A. glycines.

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“…It was considered an invasive pest in North America (Ragsdale et al, 2011). Soybean aphid is now one of the most common pests impacting soybeans worldwide (Valmorbida et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

The effects of acetamiprid multigeneration stress on metabolism and physiology of Aphis glycines Matsumura (Hemiptera: Aphididae)

Liu

Zhang

et al. 2022

Arch Insect Biochem Physiol

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Aphis glycines Matsumura (Hemiptera: Aphididae) is a major soybean pest that often poses a serious threat to soybean production. In this study, we checked the effects of acetamiprid on redox, energy metabolism, and hormone expression in A. glycines. The LC 50 and LC 30 of acetamiprid were used to treat the fourth instar nymphs in each generation from F0 to F4 to measure the activity of peroxidase, pyruvate kinase, and trehalase using a microassays approach. The peroxidase activity was significantly higher than control when treated with the LC 30 of acetamiprid in F2−F5 generations. The activity of pyruvate kinase was significantly higher, while trehalase activity was substantially lower than control in each generation.Besides, we monitored molting and juvenile hormone expression in soybean aphids using enzyme-linked immunosorbent assay. The juvenile hormone titer of third instar nymphs was significantly higher in the treatment group (F1, F2, F4, and F5), while no effects were noted in the F3 generation. Taken together, the activity of peroxidase and pyruvate kinase in soybean aphid first increased to the peak and then decreased, while the trehalase activity continuously decreased in all generations following exposure to acetamiprid. The juvenile hormone titer was significantly higher, while the molting hormone titer was significantly lower in LC 50 -treated aphids than in control.

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Soybean aphid (Hemiptera: Aphididae) response to lambda‐cyhalothrin varies with its virulence status to aphid‐resistant soybean

Cited by 12 publications

References 53 publications

Evaluating the role of insecticidal seed treatment and refuge for managing soybean aphid virulence

Evaluating the role of insecticidal seed treatment and refuge for managing soybean aphid virulence

Evidence of enhanced reproductive performance and lack‐of‐fitness costs among soybean aphids, Aphis glycines, with varying levels of pyrethroid resistance

The effects of acetamiprid multigeneration stress on metabolism and physiology of Aphis glycines Matsumura (Hemiptera: Aphididae)

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