Pyrethroid resistance in the pest mite, Halotydeus destructor: Dominance patterns and a new method for resistance screening

Cheng, Xuan; Umina, Paul A; Lee, Siu Fai; Hoffmann, Ary A.

doi:10.1016/j.pestbp.2019.04.010

Cited by 16 publications

(18 citation statements)

References 52 publications

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“…Maintaining reservoirs of susceptible mites along fence‐lines, rather than removing these through pesticide applications, could also help maintain susceptibility in mite populations with a low incidence of resistance. Recent research has shown pyrethroid resistance is recessive 15 and there are likely fitness costs associated with the L1024F kdr mutation in H. destructor 49 . As such, fence‐line reservoirs may enable mites (which in the absence of pesticides, have a higher level of fitness than resistant individuals) to build‐up in numbers and disperse into adjacent fields, diluting the frequency of resistant alleles within a population.…”

Section: Discussionmentioning

confidence: 99%

“…This is likely due to the underlying mechanisms conferring resistance. In H. destructor, pyrethroid resistance is linked to a single‐nucleotide polymorphism in the voltage‐gated para sodium channel 14 and is incompletely recessive 15 . Mutations within the sodium channel gene are linked to pyrethroid resistance in a large number of insects and mites 16–18 .…”

Section: Introductionmentioning

confidence: 99%

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Learnings from over a decade of increasing pesticide resistance in the redlegged earth mite, Halotydeus destructor (Tucker)

Arthur¹,

Maino²,

Hoffmann

et al. 2021

Pest Management Science

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BACKGROUND The redlegged earth mite, Halotydeus destructor (Tucker), is a destructive and economically important pest of winter grain crops and pastures in Australia. It is largely controlled by pesticides, but this mite has evolved resistance to pyrethroid and organophosphate chemicals. A national Resistance Management Strategy has been developed for pro‐active management to delay further resistance evolution, though its success is reliant on a detailed understanding of the incidence, patterns of spread, current distribution and the nature of resistance in the field. Here, we report on a long‐term resistance surveillance programme undertaken between 2006 and 2019 informed by resistance risk forecasting. RESULTS By mapping the Australian distribution of resistance through time, we show that resistance is present across three Australian states and covers more than 3000 km. This current range includes a recently identified population exhibiting organophosphate resistance representing the most easterly location of resistance in H. destructor. Using field history information, we identify associations for the first time between crop management practices employed by farmers and the presence of pyrethroid resistance. Management strategies that could minimize the risk of further resistance include limiting local spread of resistance through farm hygiene practices, crop rotations and reducing pesticide usage. CONCLUSION This study highlights the challenges of resistance in H. destructor but also indicates how quantitative resistance risk analysis can be developed to target field surveillance and delay further resistance. The management strategies highlighted in this study can help maintain the effectiveness of control options but will depend on farmer engagement and adoption. © 2021 Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Learnings from over a decade of increasing pesticide resistance in the redlegged earth mite, Halotydeus destructor (Tucker)

Arthur¹,

Maino²,

Hoffmann

et al. 2021

Pest Management Science

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“…However, allelic screening with genetic markers broadens the scope for monitoring across populations over both space and time. For instance, knowledge of the pyrethroid resistance mutations in the diamondback moth, Plutella xylostella (Linnaeus, 1758) (Endersby et al 2011), and the redlegged earth mite, Halotydeus destructor (Tucker, 1925) (Edwards et al 2018;Cheng et al 2019;Yang et al 2020), has been used to understand the distribution and frequency of resistance across Australia. Similarly, molecular assays have been exploited in the green peach aphid, Myzus persicae (Sulzer, 1776), to demonstrate the Australian-wide distribution of carbamate, organophosphate, pyrethroid and neonicotinoid resistance (de Little et al 2017).…”

Section: Insecticide Resistance and Genetic Markers Of Resistancementioning

confidence: 99%

“…2018; Cheng et al . 2019; Yang et al . 2020), has been used to understand the distribution and frequency of resistance across Australia.…”

Section: Introductionmentioning

confidence: 99%

Empowering Australian insecticide resistance research with genetic information: the road ahead

2020

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Insecticides are important for chemical control of arthropod pests in agricultural systems but select for resistance as an adaptive trait. Identifying the genetic mechanism(s) underpinning resistance can facilitate development of genetic markers, which can be used in monitoring programs. Moreover, understanding of genetic mechanisms in a broader population genetic context can be used to infer the origins of resistance, predict the dynamics of resistance evolution and evaluate the efficacy of different management strategies. Transitioning genetic information successfully into practical solutions requires overcoming two major hurdles. Firstly, genetic mechanisms must be identified to develop genetic markers. Secondly, routine use of genetic markers is required to build substantial spatio‐temporal data on the distribution and frequency of resistance alleles. In this study, we demonstrate large knowledge gaps on the genetic mechanisms of insecticide resistances in Australia using eight established arthropod pests important to the grains industry: Bemisia tabaci (silverleaf whitefly), Frankliniella occidentalis (western flower thrips), Halotydeus destructor (redlegged earth mite), Helicoverpa armigera (cotton bollworm), Myzus persicae (green peach aphid), Plutella xylostella (diamondback moth), Tetranychus urticae (two‐spotted spider mite) and Thrips tabaci (onion thrips). Many resistances have not been characterised at the genetic level in most pests, even for chemical MoA groups with a long history of use in Australia. Moreover, monitoring of resistance is spatio‐temporally patchy, which precludes examination of long‐term trends or predictive modelling. We suggest that leveraging cumulative global knowledge of resistances to develop a priori candidate genes, and incorporation of genomic approaches, can help overcome the hurdles of embracing genetic information in resistance management. We highlight the recently invasive Spodoptera frugiperda (fall armyworm) as a case study where genetic markers and genomic approaches should prove useful in rapidly assessing the risk of this species to the Australian grains industry and other agricultural commodities. The uptake of genetic information into management can only occur once its benefit to empower insecticide resistance research is fully realised. Ultimately, the road ahead requires amalgamation of multifaceted data (genes, environment and spatio‐temporal replication) to better understand and predict the dynamics of resistance evolution.

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“…Cheng et al 17 . recently demonstrated that pyrethroid resistance was nearly completely recessive in a highly‐resistant mite population from Boyup Brook, in WA.…”

Section: Introductionmentioning

confidence: 99%

Strip spraying delays pyrethroid resistance in the redlegged earth mite, Halotydeus destructor: a novel refuge strategy

Maino¹,

Hoffmann

Binns

et al. 2021

Pest Management Science

Self Cite

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BACKGROUND Pesticide resistance has seen control options for the redlegged earth mite (RLEM), Halotydeus destructor, dwindle for Australian grain farmers. The recent discovery of high recessiveness for pyrethroid resistance in RLEM provided an opportunity to examine the feasibility of a refuge strategy to slow the evolution of resistance. Unlike lepidopterous pests in Bt crops, where refuge strategies are routinely practiced, RLEM is a slow‐moving pest, which will impact the design of susceptible refuges. RESULTS Firstly, we confirmed the pyrethroid resistant allele is recessive to the susceptible (wildtype) allele (in terms of resistance) across spatially separated Australian populations. Secondly, we demonstrated that a small, localized resistant mite population can revert to susceptibility at field relevant scales and conditions. Next, we used a simulation modelling approach to design a practical refuge strategy to maintain susceptibility to pyrethroids in populations with a low incidence of resistance. Certain configurations (e.g. a pesticide strip width of 50 m and refuge spacing of 10 m) maintained low levels of resistance across a 10‐year time horizon, with lower mite abundance and minimal yield loss. A larger refuge proportion did not always delay resistance, and, under certain conditions, increased resistance frequency. CONCLUSION Strip spraying to maintain refuges can be readily incorporated into RLEM management programs where sprayer widths in commercial cropping contexts are typically between 20–40 m. A refuge approach to RLEM management that uses strip spraying may enhance long term control options in the absence of new chemical registrations but will now require field validation. © 2021 Society of Chemical Industry.

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Pyrethroid resistance in the pest mite, Halotydeus destructor: Dominance patterns and a new method for resistance screening

Cited by 16 publications

References 52 publications

Learnings from over a decade of increasing pesticide resistance in the redlegged earth mite, Halotydeus destructor (Tucker)

Learnings from over a decade of increasing pesticide resistance in the redlegged earth mite, Halotydeus destructor (Tucker)

Empowering Australian insecticide resistance research with genetic information: the road ahead

Strip spraying delays pyrethroid resistance in the redlegged earth mite, Halotydeus destructor: a novel refuge strategy

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