Effect of hexythiazox and spiromesifen resistance on the life cycle of the predatory mite Neoseiulus californicus (Acari: Phytoseiidae)

Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) is one of the most important and effective predators of Tetranychus spp. (Acari: Tetranychidae). This study analyzed the effects of hexythiazox and spiromesifen resistance on biological characteristics of N. californicus. Pre-oviposition, ovip...

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Bibliographic Details
Published in:Experimental & applied acarology 2014-10, Vol.64 (2), p.245-252
Main Authors: Yorulmaz Salman, Sibel, Ay, Recep
Format: Article
Language:English
Subjects:
Acari
Acaricides - pharmacology
adults
Animal Ecology
Animal Genetics and Genomics
Animal Systematics/Taxonomy/Biogeography
Animals
at-risk population
biological resistance
Biomedical and Life Sciences
Eggs
Entomology
Female
Females
hexythiazox
Life Cycle Stages - drug effects
Life Sciences
Life span
life tables
longevity
Mites - drug effects
Mites - growth & development
Neoseiulus californicus
oviposition
Phytoseiidae
Predators
Predatory Behavior
predatory mites
Spiro Compounds - pharmacology
spiromesifen
Tetranychidae
Tetranychus
Thiazolidines - pharmacology
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Summary:Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) is one of the most important and effective predators of Tetranychus spp. (Acari: Tetranychidae). This study analyzed the effects of hexythiazox and spiromesifen resistance on biological characteristics of N. californicus. Pre-oviposition, oviposition, post-oviposition times, adult lifespan, total number of eggs laid per female, net reproductive rate (R₀), intrinsic rate of increase (rₘ), doubling time (DT), mean generation time (T) and finite rate of increase (λ) were compared among three populations: 63.9-fold hexythiazox resistant (HEX14), 53.6-fold spiromesifen resistant (SPR13) and a susceptible base population. Pre-oviposition and oviposition times, mean number of eggs/female, adult lifespan, R₀ and rₘ values were all significantly higher for the two resistant populations than for the susceptible population. Life tables of HEX14, SPR13 and the susceptible population showed that R₀ was 35.0, 26.5 and 19.4 (females/female generation), rₘ was 0.35, 0.32 and 0.30 (females/female/day), DT was 1.92, 2.07 and 2.27 days, T was 9.8, 9.8 and 9.7 days, and λ was 1.43, 1.39 and 1.35 (individuals/female/day), respectively.
ISSN:0168-8162
1572-9702
DOI:10.1007/s10493-014-9817-8