Taxonomic studies on tetranychoid mites infesting vegetable and fruit crops in Delhi and surrounding areas

Nassar, O.A.; Ghai, Swaraj

doi:10.1080/00305316.1981.10434337

Cited by 8 publications

(7 citation statements)

References 16 publications

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“…Recently, a study was conducted [4] on the phenotypic variations among different populations of E. orientalis from SA and it reported seven species, viz. E. phaseoli [28], E. guangdongensis [29], E. xianensis [29], E. fici [8], E. pruni [30], E. ricinus [30], and E. sanaae [30] as junior synonyms of E. orientalis. The present study fortifies the findings of a previous study [4] and the comprehensive diagnostic key provided should be followed for the proper identification of Eutetranychus species.…”

Section: Discussionmentioning

confidence: 99%

Molecular and phenotypic variations in Eutetranychus orientalis (Klein) populations from Saudi Arabia

et al. 2020

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The oriental red spider mite, Eutetranychus orientalis (Klein) is a major pest of citrus in many countries including Saudi Arabia (SA). The morphological variations among the different populations of E. orientalis were reported. In the present study, phenotypic variations based on 40 different morphological characteristics were evaluated in 10 E. orientalis populations collected from different hosts and regions of SA. Further, ITS2-rDNA sequences were used to confirm the identity of these phenotypically varying populations. Phenotypic variations in all populations were found in the shape and length of dorsal setae, striation pattern between setae d1 and e1, and leg chaetotaxy. The rDNA sequence analysis of these morphologically varying populations resulted in 10 different ITS2 Saudi haplotypes. The phenotypic and genetic variations were more related to the host plants rather than their geographic distribution. The E. orientalis population collected from Phoenix dactylifera was phenotypically distinct and genetically divergent. The populations collected from citrus species were also more phenotypically and genetically related to each other than to populations collected from non-citrus host plants. The haplotypes recovered from Ziziphus sp., Morus sp., and Azadirecta indica from different regions were grouped in the same sub-clade. Further, the ITS2 haplotypes of Saudi E. orientalis recovered from Citrus reticulata from Riyadh and Al Ula were 100% identical to the ITS2 haplotypes recovered from Citrus sp. from Israel. It is concluded that phenotypic variations exist among different populations of E. orientalis inhabiting different host plants. This species should be identified carefully by considering phenotypic intraspecific variations.

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Section: Discussionmentioning

confidence: 99%

Molecular and phenotypic variations in Eutetranychus orientalis (Klein) populations from Saudi Arabia

et al. 2020

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“…Baker and Pritchard (1960) provided a key to the world with eight species of Eutetranychus . Later, only two regional keys of Eutetranychus species have been constructed from India and Africa including nine and 16 species, respectively (Nassar and Ghai 1981, Meyer 1987). To date, Eutetranychus includes 34 nominal species, mostly reported from Africa and Asia (Migeon and Dorkeld 2006–2017).…”

Section: Introductionmentioning

confidence: 99%

The spider mites of the genus Eutetranychus Banks (Acari, Trombidiformes, Tetranychidae) from Saudi Arabia: two new species, a re-description, and a key to the world species

Kamran¹,

Khan²,

Alatawi³

2018

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Two new species of the genus Eutetranychus Banks are described and illustrated based on adult females and males, E.spinosussp. n. from Indigoferaspinosa Forssk (Leguminosae), E.neotransversussp. n. from Juniperusprocera Hochst. ex Endl. (Cupressaceae), and E.palmatus Attiah, 1967 is redescribed from Washingtoniarobusta H. Wendl. (Arecaceae). Additionally, the intraspecific morphological variations within E.orientalis populations, collected from 28 various host plants and 80 different localities from six regions of Saudi Arabia from 2009 to 2017, are discussed and presented. The genus Eutetranychus is divided into two species groups based on the presence of one seta (orientalis group) or two setae (banksi group) on coxa II. In addition, seven Eutetranychus species are suggested as synonyms of E.orientalis (Klein, 1936) and E.papayensis Iqbal & Ali, 2008 is considered as species inquirenda. A key to all known species of the genus Eutetranychus is provided.

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“…It is a cosmopolitan species in tropical and subtropical areas, infesting a wide variety of agricultural plants (Pritchard and Baker, 1955;Bolland et al, 1998). It was reported in India by Khot and Patel (1956), later by Manson (1963), Nassar and Ghai (1981) Gupta (1992); ; Gupta, 1995;Gupta and Chatterjee, 1997;and Migeon (2015). Recently Lekha and Kinathi (2019) The study recorded the mite species, T. marianae on rose from Vellanikkara.…”

Section: Resultsmentioning

confidence: 87%

Diversity of Spider Mites (Tetranychidae) on Ornamental Plants in Central Kerala

Prakash

Bhaskar

Mathew

et al. 2022

ije

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Purposive sampling surveys were conducted in homestead gardens and ornamental nurseries at different localities of Thrissur and Ernakulam districts during 2017-19 to study the diversity of spider mites associated with ornamental plants. Mite samples collected from rose, adenium, gerbera, marigold, chrysanthemum, balsam, cock’s comb, orchid, cassia, cairo morning glory, zinnia, bauhinia, crape jasmine and pinto peanut were maintained as isoline cultures in the laboratory. Male and female specimens from isolines were slide mounted for morphological characterisation and identification. The results revealed eight species belonging to three genera viz., Tetranychus truncatus Ehara, T. okinawanus Ehara, T. urticae Koch, T. fijiensis Hirst, T. neocaledonicus Andre, T. marianae McGregor, Eutetranychus orientalis Klein and Oligonychus biharensis Hirst. The study recorded new hosts for the alien species, T. okinawanus and T. truncatus which suggests the potential of these species to turn invasive in Kerala’s ecosystems. The spider mite fauna on rose was more diverse, indicating the need for imposing strict quarantine regulations. The study observed T. marianae as a new record from Kerala.

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Taxonomic studies on tetranychoid mites infesting vegetable and fruit crops in Delhi and surrounding areas

Cited by 8 publications

References 16 publications

Molecular and phenotypic variations in Eutetranychus orientalis (Klein) populations from Saudi Arabia

Molecular and phenotypic variations in Eutetranychus orientalis (Klein) populations from Saudi Arabia

The spider mites of the genus Eutetranychus Banks (Acari, Trombidiformes, Tetranychidae) from Saudi Arabia: two new species, a re-description, and a key to the world species

Diversity of Spider Mites (Tetranychidae) on Ornamental Plants in Central Kerala

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