A bet-hedging strategy rather than just a classic fast life-history strategy exhibited by invasive fall armyworm

PengXiang, Wu; Ren, Qilin; Wang, Wei; Ma, Zhuo; Zhang, Runzhi

doi:10.1127/entomologia/2021/1154

Cited by 25 publications

(16 citation statements)

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“…However, the life‐history strategies shown here at stressful temperatures in the laboratory need to be confirmed with further field investigations. Laboratory results cannot be directly extrapolated to field populations because laboratory experiments are simplified systems 59,60 . Moreover, determining whether the strategies shown here are instrumental in FAW invasion success would require experimental releases.…”

Section: Discussionmentioning

confidence: 99%

“…Laboratory results cannot be directly extrapolated to field populations because laboratory experiments are simplified systems. 59,60 Moreover, determining whether the strategies shown here are instrumental in FAW invasion success would require experimental releases. Additional study on life-history strategies of other closely related moth species living in unfavorable temperatures would help confirm if this strategy is general.…”

Section: Discussionmentioning

confidence: 99%

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The high invasion success of fall armyworm is related to life‐history strategies across a range of stressful temperatures

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Liu

et al. 2022

Pest Management Science

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BACKGROUND: Insects living in unfavorably high or low temperatures are predicted to display a fast or slow life-history strategy. Here, we examined life histories of fall armyworm (FAW), a globally important invasive species with a broad ecological niche, at five constant temperatures of 13, 19, 25, 31 and 37°C, to study life-history responses to different temperatures.RESULTS: In our experiment, FAW had lower lifetime fecundity at unfavorable temperatures, a finding that is consistent with the idea that FAW can shift resources from reproduction to other functions under stressful conditions-such as heat or cold tolerance. Given the adverse effects of stressful temperatures, life-history strategies arise from individuals having limited remaining resources to allocate towards vital functions like survival or reproduction. Here we show plasticity in life-history strategies adopted at different temperatures. Rather than simply varying along a fast-slow continuum, FAW at unfavorably high temperatures exhibited lower daily fecundity and longer reproductive lifespans, and at unfavorably low temperatures showed a shorter peak in reproduction later in life, compared with FAW at 25°C. Such patterns, if adaptive, could suggest a strategy mitigating reproductive and mortality risk in unfavorable environments, however, this remains to be tested. CONCLUSION: Our analysis suggests that the high invasion success of FAW may result from their ability to adjust life-history strategies, across a range of stressful temperatures, in a way that reduces not only mortality, but also fecundity loss. The adoption of such strategies may be instrumental for the global invasion success of FAW.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The high invasion success of fall armyworm is related to life‐history strategies across a range of stressful temperatures

Head

Liu

et al. 2022

Pest Management Science

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“…Under suitable temperatures, the eggs hatch into larvae within 2–10 days. Combined with its strong long-distance migration abilities ( Pashley et al, 1985 ; Johnson, 1987 ; Wu et al, 2021 ), the rapid spread and serious harm caused by S. frugiperda has attracted global attention ( Wang et al, 2022a ). Nature published an article entitled “Invasive alien pests hit Africa hard, ” which was about the large-scale invasion of S. frugiperda, causing global concern ( Wild, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Potential inhibitory effects of compounds ZK-PI-5 and ZK-PI-9 on trehalose and chitin metabolism in Spodoptera frugiperda (J. E. Smith)

Zhong

Jiang

et al. 2023

Front. Physiol.

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Introduction:Spodoptera frugiperda is an omnivorous agricultural pest which is great dangerous for grain output.Methods: In order to investigate the effects of potential trehalase inhibitors, ZK-PI-5 and ZK-PI-9, on the growth and development of S. frugiperda, and to identify new avenues for S. frugiperda control, we measured the content of the trehalose, glucose, glycogen and chitin, enzyme activity, and gene expression levels in trehalose and chitin metabolism of S. frugiperda. Besides, their growth and development were also observed.Results: The results showed that ZK-PI-9 significantly reduced trehalase activity and ZK-PI-5 significantly reduced membraned-bound trehalase activity. Moreover, ZK-PI-5 inhibited the expression of SfTRE2, SfCHS2, and SfCHT, thus affecting the chitin metabolism. In addition, the mortality of S. frugiperda in pupal stage and eclosion stage increased significantly after treatment with ZK-PI-5 and ZK-PI-9, which affected their development stage and caused death phenotype (abnormal pupation and difficulty in breaking pupa).Discussion: These results have provided a theoretical basis for the application of trehalase inhibitors in the control of agricultural pests to promote future global grain yield.

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“…The International Centre for Agriculture and Biological Sciences has reported that the yield losses caused by the fall armyworm across 12 African countries will likely reach to 8.3 million to 20.6 million tonnes per year, costing $2.48 billion to $6.19 billion, without any control measures (Murúa et al 2006). As a highly polyphagous agricultural pest, S. frugiperda can feed on up to 186 plant species across 42 families, with maize, rice, and sorghum are the preferable hosts (Montezano et al 2018;Wu et al 2021). The reproduction ability and growth rate of S. frugiperda is remarkable -females can produce more than 1000 eggs and their life cycle is approximately 30 days (Firake & Behere 2020).…”

Section: Introductionmentioning

confidence: 99%

Biocontrol performance and mass production potential of the larval endoparasitoid Campoletis chlorideae against Spodoptera frugiperda

Zhang

Zhao

Mohamed

et al. 2023

Preprint

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Spodoptera frugiperda is an invasive pest that causes severe economic losses in outbreak regions. The use of natural enemies of S. frugiperda, particularly native parasitoids, has been suggested as a promising control strategy due to high rates of pesticide resistance. Campoletis chlorideae is a solitary larval endoparasitoid with a broad host range that includes S. frugiperda; however, its parasitism rate, developmental stages, and population dynamics during S. frugiperda infection remain unclear. Here, we performed a systematical analysis to evaluate the biological control performance of C. chlorideae on the fall armyworm through age-stage, two-sex life tables. Due to their reproductive ability and short-life cycle, fall armyworms have the potential to be developed as a mass production host of C. chlorideae, we investigated the mass production potential by group-rearing fall armyworms using a low cannibalism rate artificial diet. Our results revealed an adequate biological control performance of C. chlorideae on S. frugiperda with a lifetime fecundity of 301.5 eggs/female, net reproduction rate (R0, adult females reproduced by a female) of 62.5, longevity of 28 days, and intrinsic rate of increase (r) of 1.2148. However, mass production factors require further optimization to improve efficiency and reduce the cost, as there was a lower net reproduction rate (6.02) due to the parasitization-induced cannibalism. This study provides instruction and guidance for the application and release of C. chlorideae for control of the fall armyworm.

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A bet-hedging strategy rather than just a classic fast life-history strategy exhibited by invasive fall armyworm

Cited by 25 publications

References 0 publications

The high invasion success of fall armyworm is related to life‐history strategies across a range of stressful temperatures

The high invasion success of fall armyworm is related to life‐history strategies across a range of stressful temperatures

Potential inhibitory effects of compounds ZK-PI-5 and ZK-PI-9 on trehalose and chitin metabolism in Spodoptera frugiperda (J. E. Smith)

Biocontrol performance and mass production potential of the larval endoparasitoid Campoletis chlorideae against Spodoptera frugiperda

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