Emergence of arrehenotoky and sensitivity to pesticides in onion thrips (&lt;i&gt;Thrips tabaci&lt;/i&gt; Lindeman) in Mie Prefecture

Sasayama, Norio; Taguchi, Hiromi; Tanaka, Chiharu; Nishino, Minoru

doi:10.4165/kapps.62.161

Cited by 2 publications

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“…In recent years, decreased susceptibility to multiple insecticides has been reported for T. tabaci. [18][19][20] However, decreased susceptibility to organophosphates, pyrethroids, neonicotinoids, and diamides has been reported only in the arrhenotokous populations. [19][20][21][22] Arrhenotokous and thelytokous strains with T929I exhibited a similar level of resistance to a pyrethroid, but biotic performances such as longevity and fecundity were markedly inferior in the latter.…”

Section: Discussionmentioning

confidence: 99%

“…[18][19][20] However, decreased susceptibility to organophosphates, pyrethroids, neonicotinoids, and diamides has been reported only in the arrhenotokous populations. [19][20][21][22] Arrhenotokous and thelytokous strains with T929I exhibited a similar level of resistance to a pyrethroid, but biotic performances such as longevity and fecundity were markedly inferior in the latter. 6,7) Little or no information related to the fitness costs of resistance to organophosphates, neonicotinoids, and diamides in different reproductive modes of T. tabaci has been available.…”

Section: Discussionmentioning

confidence: 99%

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Field survey of reproductive modes and sodium channel mutations associated with pyrethroid resistance in Thrips tabaci

Tomizawa,

Aizawa,

Jouraku

et al. 2024

J. Pestic. Sci.

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Using PCR-Restriction Fragment Length Polymorphism (RFLP) with mitochondrial cytochrome c oxidase subunit I sequences, we examined the reproductive modes of female adults of Thrips tabaci collected at 54 sites across Japan. Results showed the presence of heteroplasmic insects harboring mitochondria associated with arrhenotoky and thelytoky. Using the insects, we also applied PCR-RFLP to examine the genotypes for the amino acid mutation (T929I) site involved in pyrethroid resistance. Findings showed the presence of thelytokous heterozygotes under the circumstance that most arrhenotokous insects are resistant homozygotes, and many thelytokous insects are susceptible homozygotes. These results suggest that, in the field, genetic exchange occurs between insects through of both reproductive modes. A survey of the genotypes for the other amino acid mutations using nucleotide sequencing showed a decline of insects with an M918T and L1014F pair and an increase of insects with M918L. These results suggest the evolutional progression of amino acid mutations associated with pyrethroid resistance in T. tabaci.

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Section: Discussionmentioning

confidence: 99%