Effects of Density and Host Quality on Rate of Development, Survivorship, and Sex Ratio in the Carmine Spider Mite
1

Wrensch, Dana L.; Young, S. S. Y.

doi:10.1093/ee/7.4.499

Cited by 68 publications

(38 citation statements)

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“…Regular extreme temperatures are a reliable indicator of unfavorable habitats and could therefore influence the female decision to produce more female offspring to escape from local conditions. A similar strategy was reported by Wrensch and Young (1978) in response to a different stimulus. They observed that females of T. cinnabarinus responded to leaves of poor nutritional quality by producing a maximum of daughters, the potential emigrants.…”

Section: Discussionsupporting

confidence: 65%

Temperature and sex allocation in a spider mite

2003

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Although temperature is the most important environmental factor regulating arthropod development and reproduction, its influence on sex allocation in haplodiploid arthropods remains largely unexplored. We investigated under laboratory conditions how maternal age and temperature mediate offspring sex ratio of the spider mite Tetranychus mcdanieli (Acari: Tetranychidae). Over nine temperature regimes, female-biased sex ratios were consistently observed, varying from 57 to 87% among progeny produced over lifetime. Spider mite sex ratio was affected by maternal age: more male progeny were produced at both the beginning and the end of the female lifespan, yielding a dome shaped curvilinear relationship. This pattern of variation with age probably results from constraints on using sperm at young ages and sperm depletion or viability at older ages. We found a significant curvilinear relationship between temperature and sex ratio. The proportion of female offspring was lowest at intermediate temperatures and highest at extreme temperatures. We suggest that increased female-biased sex ratio at extreme temperatures is an evolutionary response of spider mites to deteriorating habitats as, in the Tetranychidae, females have better capacities than males to disperse and survive under harsh conditions.

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Section: Discussionsupporting

confidence: 65%

Temperature and sex allocation in a spider mite

2003

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“…Dispersal to new (young) leaves higher on the plant would theoretically provide more available nutrients (e.g., nitrogen) than would older leaves (Tijerina-Chavez, 1982;Wilson et al, 1988). Spider mites have becn shown to exhibit higher reproductive rates in uncrowded (low density), than in crowded (high density) conditions, a phenomenon believed to result from the laster depletion of leaf nutrients at high densities (Wrensch and Young, 1978). Penman and Chapman (1988) suggested that this effect also occurs because at low density, spider mites are less subject to density-dependent competition, than at high density.…”

Section: Discussionmentioning

confidence: 99%

An ecosystem analysis of spider mite outbreaks: physiological stimulation or natural enemy suppression

Trichilo

Wilson

1993

Exp Appl Acarol

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A simulation model was used to as~ss the role of several mechanisms proposed to be responsible for spider mite outbreaks on cotton that are typically observed following applications of insecticides. Simulation results were compared to an outbreak that occurred after two pyrethroid applications on cotton in a controlled experiment in the San Joaquin Valley of California. In the model, physiological cffects were simulated by increasing spider mite fecundity and decreasing developmental duration, whereas loss of natural enemies was simulated by increasing spider mite age-specific survival. At the levels simulated, smwival had the greatest impact on maximum spider mite density, degree days (°D) to maximum density, and cumulative spider mite-°D, whereas fecundity had the least, and developmental duration had an intermediate effect. There were substantial two-way interactions anlong all three life history parameters, with age-specific survival having the most influence. Surviwd had the greatest effect on spider mite population dynamics when in combination with short development',d duration. The influence of developmental duration on maximum spider mite density was greater than comparable percentage changes in fecundity, an effect that was more pronounced at high than at low survival, Changing fecundity, developmental duration, or age-specific survival individually did not result in a spider mite outbreak of the magnitude observed in the field. However, changing these three parameters simultaneously, resulted in a simulated maximum density of 8.000/m 2. which represents a 12-fold increase over the untreated control, and closely mimicked the previously observed field outbreak. It is proposed that spider mite outbreaks on cotton following insecticide applications are not solely the result of physiological stimulation, but are rather due to several life history parameters being affected simultaneously, with natural enemy-mediated survival having the greatest individual impact. Implications of chemically-induced phenomena afflicting spider mite management on cotton are discussed. INTRODU(YFIONOutbreaks of herbivorous arthropods such as spider mites, Tetranvchus spp., following applications of insecticides, have received much attention (Bartlett 1968;~A copy of thc crop and herbivore simttlation models can be obtained by sending an IBM compatible disk to L.T. Wilson.

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“…A razão sexual de tetraniquídeos pode ser afetada pela qualidade do alimento ingerido. Populações de ácaros desenvolvendo-se em folhas deterioradas, com pouca qualidade alimentar, podem gerar uma população descendente com maior quantidade de fêmeas YOUNG, 1978). Uma vez que a deterioração do alimento deve obrigar os ácaros a se dispersarem para novos locais, a maior produção de fêmeas nessas condições é uma característica de sobrevivência da espécie (YOUNG et al, 1986).…”

Section: Experimento De Laboratóriounclassified

Resistência de cultivares de videira ao ácaro-rajado Tetranychus urticae na região de Jales, estado de São Paulo

Valadão¹,

Vieira

Pigari³

et al. 2012

Rev. Bras. Frutic.

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RESUMO -As videiras da região de Jales, Estado de São Paulo, têm sido intensamente atacadas pelo ácaro-rajado, Tetranychus urticae Koch. O presente trabalho teve por objetivo comparar cultivares de uva quanto à adequação como hospedeiras da espécie. Em experimento de campo, naquele local, a ocorrência da praga, ao longo de 12 meses, foi acompanhada nas cultivares de uvas finas, Itália e Benitaka, e na cultivar de uva rústica, Niagara Rosada. No laboratório, a biologia de T. urticae foi estudada nessas três cultivares e na 'Redimeire'. Na cultivar Niagara Rosada, o ácaro-rajado apresentou menor fecundidade e menor sobrevivência, indicando a presença de mecanismos de resistência por antibiose. Além disso, houve maior tentativa de fuga dessa cultivar, sugerindo resistência por não preferência. Termos para Indexação: 'Niagara Rosada', antibiose, não preferência. VINE CULTIVARS RESISTANCE TO TWOSPOTTED SPIDER MITE Tetranychus urticae Koch IN THE REGION OF JALES, STATE OF SÃO PAULOABSTRACT -In the region of Jales, the vines has been heavily attacked by the twospotted spider mite, Tetranychus urticae Koch. The objective of this study was to compare grape cultivars for suitability as hosts of the species. In field experiment at that location, the pest occurrence, over 12 months, was accompanied on fine grape cultivars, Italy and Benitaka, and rustic grape cultivar, Niagara Rosada. In the laboratory, the T. urticae biology was carried out on these three cultivars and in the 'Redimeire'. Twospotted spider mite presented lower fertility and lower survival on Niagara Rosada cultivar indicating the presence of antibiosis resistance mechanisms. In addition, there was a greater attempt to escape in this cultivar, suggesting a resistance for non-preference.

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Effects of Density and Host Quality on Rate of Development, Survivorship, and Sex Ratio in the Carmine Spider Mite 1

Cited by 68 publications

References 0 publications

Temperature and sex allocation in a spider mite

Temperature and sex allocation in a spider mite

An ecosystem analysis of spider mite outbreaks: physiological stimulation or natural enemy suppression

Resistência de cultivares de videira ao ácaro-rajado Tetranychus urticae na região de Jales, estado de São Paulo

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