Morphometric observations on three populations of Schizaphis graminum (Rondani), a main wheat aphid pest in Brazil

Rubin-de-Celis, Verónica; Gassen, D. N.; Callegari-Jacques, Sídia Maria; Valente, Vera L. S.; Oliveira, Alice Kalisz de

doi:10.1590/s0301-80591997000300002

Cited by 3 publications

(3 citation statements)

References 15 publications

(17 reference statements)

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“…In Brazil, S. graminum causes damage to wheat (Triticum aestivum L.) and sorghum (Sorghum bicolor L.) crops (Rubin-de-Celis et al, 1997). Therefore, this hemipteran species is a relevant target for studies aimed at biological control using coccinellids.…”

Section: Introductionmentioning

confidence: 99%

Biological aspects of Harmonia axyridis in comparison with Cycloneda sanguinea and Hippodamia convergens

Santos

Santos-Cividanes

Cividanes

et al. 2013

Pesq. agropec. bras.

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-The objective of this work was to evaluate the development, survival, reproductive capacity, and longevity of the Asian ladybug Harmonia axyridis in comparison with Cycloneda sanguinea and Hippodamia convergens. Coccinellid larvae and adults were fed daily with Schizaphis graminum. Ten couples of each species were isolated for evaluation of the adult phase. The duration of the larval stage of H. axyridis is the longest (10.2 days) and its adults are the heaviest (29.7 mg) compared with C. sanguinea and H. convergens. The three species showed similar percentages of survival during the developmental stages. An average of 82% of C. sanguinea, H. axyridis, and H. convergens larvae reached adulthood, which indicates that temperature (25°C) and the offered prey are favorable to coccinellid development. Harmonia axyridis produces a higher total number of eggs per female (1,029.2) than the other evaluated species. However, H. axyridis, which lives for an average of 147.2 days, does not show a significantly greater longevity than C. sanguinea (87.2 days) and H. convergens (134.3 days).Index terms: biological control, coccinellid, development, longevity, ladybug, predator. Termos para indexação: controle biológico, coccinelídeo, desenvolvimento, longevidade, joaninha, predador. Aspectos biológicos de Harmonia axyridis em comparação a Cycloneda sanguinea e Hippodamia convergens

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Section: Introductionmentioning

confidence: 99%

Biological aspects of Harmonia axyridis in comparison with Cycloneda sanguinea and Hippodamia convergens

Santos

Santos-Cividanes

Cividanes

et al. 2013

Pesq. agropec. bras.

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“…As the life history traits are highly correlated and add to fitness of organisms as a whole, an analysis to reduce the redundancy of the variables is essential to infer about the relative importance of these traits to the life history of the organisms. 33 , 39 , 42 …”

Section: Methodsmentioning

confidence: 99%

Estimation of Fitness of Normal and Stylopized Paddy Pest, White LeafhopperCofana spectra(Distant) (Hemiptera: Cicadellidae), in West Bengal, India through Correlation of Life History Traits

et al. 2014

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The assessment of the morphological and reproductive features of white rice leafhopper Cofana spectra (Distant) was carried out using selected characters that bear importance in determining the fitness at the individual and population levels. Morphometric measurements of the individuals reared in the laboratory as normal and stylopized with the strepsipteran parasitoid, Halictophagus australensis Perkins, were recorded and analyzed. A t-test was performed to justify whether parasitization by H. australensis affected the traits. Correlations and regression analyses were carried out to deduce the difference in relative importance of the morphological features in the life history of C. spectra and their variation because of stylopization by H. australensis. A principal component analysis (PCA) was applied on the morphometric data to further substantiate the difference observed in the traits. In case of stylopized white leafhopper (WLH), fecundity was inhibited almost completely irrespective of seasons. The effect of stylopization on the life history traits of C. spectra has been noted that supports its possible use in biocontrol.

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“…collected. Eleven morphological characters, generally used in taxonomy of Aphidinae, and of the S. graminum group in particular (Stroyan, 1984; Fargo et al , 1986; Heie, 1986; Inayatullah et al , 1987; Rubin-de-Celis et al , 1997; Blackman & Eastop, 2006) were measured for each specimen. These characters with their abbreviations are given in table 2.…”

Section: Methodsmentioning

confidence: 99%

Identity of Schizaphis species (Hemiptera: Aphididae) in the United Kingdom: are they a threat to crops?

Kati

Shufran

Taylor

et al. 2013

Bull. Entomol. Res.

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The greenbug, Schizaphis graminum (Rondani), is a major pest of cereals in some parts of the world and is of particular concern because it can be resistant to some insecticides and overcome the resistance of crops. In the UK, it has never been found on crops, but two rather little-known and closely-related species (Schizaphis holci and Schizaphis agrostis) are associated with the wild grasses, Holcus lanatus and Agrostis stolonifera. Since 1987, winged (alate) aphids morphologically resembling the greenbug have been found in increasing numbers in 12.2 m high suction-trap samples of the Rothamsted Insect Survey (RIS); hence, studies were undertaken to establish their identity. Clones (=asexual lineages) established from populations collected from H. lanatus in southern England showed strong preference for Holcus over Agrostis and Hordeum in laboratory tests and produced sexual morphs when transferred to short-day conditions, the males being apterous, as expected for S. holci. Multivariate morphometric comparisons of alatae caught in UK RIS suction traps in 2007 and 2011 with named specimens from museum collections, including S. graminum from many countries, indicated that the suction-trapped alatae were mostly S. agrostis and S. holci. Cytochrome c oxidase subunit I (COI) mtDNA obtained from 62 UK specimens from suction-traps had 95.4-100% sequence identity with US specimens of S. graminum. Two of the UK specimens had identical COI sequence to the US sorghum-adapted form of S. graminum, and these specimens also had 100% identity with a 640 bp fragment of nDNA CytC, indicating that this form of S. graminum may already be present in the UK. Present and future economic implications of these results are discussed.

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Morphometric observations on three populations of Schizaphis graminum (Rondani), a main wheat aphid pest in Brazil

Cited by 3 publications

References 15 publications

Biological aspects of Harmonia axyridis in comparison with Cycloneda sanguinea and Hippodamia convergens

Biological aspects of Harmonia axyridis in comparison with Cycloneda sanguinea and Hippodamia convergens

Estimation of Fitness of Normal and Stylopized Paddy Pest, White LeafhopperCofana spectra(Distant) (Hemiptera: Cicadellidae), in West Bengal, India through Correlation of Life History Traits

Identity of Schizaphis species (Hemiptera: Aphididae) in the United Kingdom: are they a threat to crops?

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