A cryptic diapause strategy in <i>Halotydeus destructor</i> (Tucker) (Trombidiformes: Penthaleidae) induced by multiple cues

Cheng, Xuan; Hoffmann, Ary A.; Maino, James L.; Umina, Paul A

doi:10.1002/ps.5053

Cited by 29 publications

(9 citation statements)

References 58 publications

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“…Thirty-nine of the remaining unhatched non-diapause eggs are likely to comprise a combination of unviable eggs, which will never hatch, and 'cryptic diapause' eggs. Cryptic diapause eggs behave similarly to diapause eggs, hatching in the following autumn, but are morphologically similar to non-diapause eggs (Cheng et al 2018).…”

Section: Discussionmentioning

confidence: 95%

“…Since the development of TIMERITE ® more than two decades ago, research has highlighted the important role of temperature and moisture in modulating diapause timing in RLEM (Cheng et al 2018(Cheng et al , 2019. As climate change continues to alter temperature and moisture regimes, it is important to consider the potential impacts on pest management strategies like TIMERITE ® .…”

Section: Introductionmentioning

confidence: 99%

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Pest management strategies under changing climates: Targeting life history vulnerabilities in the redlegged earth mite, Halotydeus destructor (Tucker)

Maino,

Umina,

Pavri

et al. 2023

Preprint

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As climate change continues to modify temperature and moisture patterns, risks from pests and diseases may change as shifting temperature and rainfall conditions affect the range and activity of insects and diseases. The potential consequences of changing climate on pest management strategies must be understood for control measures to adapt to new environmental conditions. The redlegged earth mite (RLEM; Halotydeus destructor [Tucker]) is a prevalent pest that attacks pastures and crops across southern Australia and is typically controlled by pesticides. TIMERITE® is a pest management strategy focused on timing chemical control of RLEM populations during a critical period of vulnerability in the mite’s lifecycle based on historical climate. In this study, we enhance the TIMERITE® strategy by incorporating dynamic management and climatic conditions. Our findings demonstrate that climate change over the past two decades have generally shifted the optimal control window to earlier in the year, with future changes predicted to further shift optimal timings. Moreover, we extend the optimal control date of TIMERITE® to an optimal control window during spring, which maintains control efficacy against RLEM above 95% of the theoretical maximum. Overall, this research emphasizes the importance of accounting for dynamic environmental responses when developing and implementing pest management strategies to ensure their long-term effectiveness. The increased robustness and flexibility of the updated TIMERITE® strategy will help farmers maintain pest control outcomes while balancing other farm management responsibilities, such as disease and weed management, ultimately leading to cost savings.

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Pest management strategies under changing climates: Targeting life history vulnerabilities in the redlegged earth mite, Halotydeus destructor (Tucker)

Maino,

Umina,

Pavri

et al. 2023

Preprint

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“…In addition, for most irreversible plastic changes, we suspect that the phenotypic change possible will be greater than for reversible changes, for example where the deep diapause triggered early in development increases resistance to stressful conditions (Cheng et al 2018) and allows genotypes to evade predators (Pijanowska and Stolpe 1996). We also suspect that a greater range of phenotypes will be accessible to a given genotype (at least initially) if there is no need to maintain the capacity to revert to former phenotypes.…”

Section: Irreversible Change Is Potentially Cheaper and Larger Than R...mentioning

confidence: 99%

“…5). For instance, earth mites that enter a deep irreversible summer diapause, and that then emerge in predictably favourable cool autumn conditions gain a fitness advantage over earth mites entering a more reversible quiescent state which is less resistant to hot summer conditions (Cheng et al 2018). By contrast however the more reversible form has an advantage where conditions are sporadically (and less predictably) favourable (Cheng et al 2018).…”

Section: Costs Environmental Predictabilitymentioning

confidence: 99%

The dangers of irreversibility in an age of increased uncertainty: revisiting plasticity in invertebrates

Hoffmann

Bridle

2021

Oikos

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Plasticity in traits in response to environmental conditions can increase fitness, expanding the range of environments within which a genotype can generate viable and productive phenotypes, and therefore when and where populations can persist and diversify in ecological space. Adaptive forms of plasticity in invertebrates are diverse, ranging from polyphenism and diapause to behavioural thermoregulation and optimal foraging. Local patterns of environmental variation and developmental constraints will dictate which of these forms evolves. Here we review the core idea that the use of narrow developmental windows by invertebrates to attain specific types of phenotypic changes reduces their reversibility, while increasing their magnitude. These tradeoffs dictate the costs and effectiveness of plasticity in buffering environmental variation. In particular, plastic responses to narrow developmental or environmental windows increase fitness costs when predicted environmental challenges do not materialise, or when the environment changes in unpredictable ways. We then explore the converse idea that increasing trait reversibility depends on extending the period for which genotypes are sensitive to the environment, but also narrows the range of plastic phenotypes that can be generated. Considering these findings together, we would expect that the costs, benefits and constraints of reversible versus irreversible plasticity affect the rate and magnitude of adaptive responses to rapidly changing and novel environments. However, such predictions have rarely been tested or included in theoretical models. Identifying this knowledge gap leads us to propose new research directions to provide a deeper understanding of the evolution of plasticity in invertebrates and other organisms. We illustrate these possible directions through examples of Drosophila adapting to thermal stress.

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“…There may well be plastic characteristics of insects that pre-adapt them to climate change; for instance, arthropods having a summer diapause strategy or a highly flexible strategy that involves multiple forms of diapause and quiescence in response to multiple environmental components (e.g. [55]) would seem to be superbly adapted to increasingly hot and variable conditions developing under climate change.…”

Section: Combining Laboratory Experiments With Mechanistic Models To Predict Field Performance Across Timementioning

confidence: 99%

Validating measurements of acclimation for climate change adaptation

Terblanche

Hoffmann

2020

Current Opinion in Insect Science

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A cryptic diapause strategy in Halotydeus destructor (Tucker) (Trombidiformes: Penthaleidae) induced by multiple cues

Cited by 29 publications

References 58 publications

Pest management strategies under changing climates: Targeting life history vulnerabilities in the redlegged earth mite, Halotydeus destructor (Tucker)

Pest management strategies under changing climates: Targeting life history vulnerabilities in the redlegged earth mite, Halotydeus destructor (Tucker)

The dangers of irreversibility in an age of increased uncertainty: revisiting plasticity in invertebrates

Validating measurements of acclimation for climate change adaptation

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