Acaricidal effect of several commercial agrochemicals on two spider mite species, Eutetranychus africanus and Panonychus citri (Acari: Tetranychidae), infesting citrus trees in Okinawa, southwestern Japan.

Molting is essential for arthropods to grow. As one of the important arthropod pests in agriculture, key spider mite species (Tetranychus and Panonychus) can normally molt three times from the larva to adult stage within a week. This physiological strategy results in the short lifecycle of spider mites and difficulties in their control in the field. Long non-coding RNAs (lncRNAs) regulate transcriptional editing, cellular function, and biological processes. Thus, analysis of the lncRNAs in the spider mite molting process may provide new insights into their roles in the molting mechanism. For this purpose, we used high-throughput RNA-seq to examine the expression dynamics of lncRNAs and mRNAs in the molting process of different development stages in Panonychus citri. We identified 9199 lncRNAs from 18 transcriptomes. Analysis of the lncRNAs suggested that they were shorter and had fewer exons and transcripts than mRNAs. Among these, 356 lncRNAs were differentially expressed during three molting processes: late larva to early protonymph, late protonymph to early deutonymph, and late deutonymph to early adult. A time series profile analysis of differentially expressed lncRNAs showed that 77 lncRNAs were clustered into two dynamic expression profiles (Pattern a and Pattern c), implying that lncRNAs were involved in the molting process of spider mites. Furthermore, the lncRNA–mRNA co-expression networks showed that several differentially expressed hub lncRNAs were predicted to be functionally associated with typical molting-related proteins, such as cuticle protein and chitin biosynthesis. These data reveal the potential regulatory function of lncRNAs in the molting process and provide datasets for further analysis of lncRNAs and mRNAs in spider mites.

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Biodiversity of spider mites (Acari: Tetranychidae) in Serbia: a review, new records and key to all known species

Acarologia ◽

10.24349/acarologia/20184223 ◽

2017 ◽

Vol 58 (1) ◽

pp. 3-14

Author(s):

Ivana Marić ◽

Dejean Marčić ◽

Radmila Petanović ◽

Philippe Auger

Keyword(s):

Host Plant ◽

Plant Species ◽

Spider Mite ◽

New Records ◽

Spider Mites ◽

Mite Species ◽

Cultivated Plants ◽

Panonychus Citri ◽

Tetranychus Evansi ◽

Host Plant Species

Despite the economic importance of spider mites (Acari: Tetranychidae), data on their biodiversity are scarce in some regions of Europe, such as Balkan Peninsula and particularly in Serbia. In this country, according to the Spider Mites Web database, only 17 spider mite species belonging to seven genera have been reported. This study provides a review of the Serbian literature dealing with spider mites species recorded in Serbia and presents results of a four-year faunistic survey in which spider mites were collected on cultivated plants and native vegetation throughout the country. In the survey, a total of 23 species were recorded, including six species new to Serbian acarofauna: Bryobia praetiosa, Eotetranychus aceri, E. fraxini, E. pruni, Panonychus citri and Tetranychus evansi. Together with previously reported data, it raises the number of known spider mite species in Serbia to 36. A total of 90 host plant species from 21 families that are favorable to spider mites were recorded in this study; there were 62 new host records for 20 spider mite species with 11 records of new plant species as hosts of spider mites. There were 63 new records for Serbia among host plant species, raising the number of Serbian hosts for tetranychid mites to 137. The spider mite species new to Serbian acarofauna were found on 17 newly recorded host plants from 11 families. A key to all known spider mites species from Serbia is provided.

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Are Tetranychus macfarlanei Baker & Pritchard and Tetranychus malaysiensis Ehara (Acari: Tetranychidae) one species? Morphological and molecular evidences for synonymy between these two spider mite species and a note on invasiveness of T. macfarlanei on okra and eggplant in India

Systematic and Applied Acarology ◽

10.11158/saa.22.4.3 ◽

2017 ◽

Vol 22 (4) ◽

pp. 467

Author(s):

Mahran Zeity ◽

Nagappa Srinivas ◽

Chinnamade Channegowde Gowda

Keyword(s):

Spider Mite ◽

Morphological Characters ◽

Molecular Data ◽

Mite Species ◽

Coi Gene ◽

High Similarity ◽

Mitochondrial Coi ◽

Mitochondrial Coi Gene ◽

High Degree ◽

Degree Of Similarity

Study of morphological characters of Tetranychus macfarlanei Baker & Pritchard and Tetranychus malaysiensis Ehara revealed high similarity by comparing all the important characters in addition to the characters pointed out by Ehara to separate those two species. Molecular phylogeny of seven Indian populations of T. macfarlanei and one population of T. malaysiensis from Philippines along with few distantly related species of Tetranychus was attempted. High degree of similarity between these two species at mitochondrial COI gene (96%) as well as ITS2 (rDNA) (96–99%) region was evident. Based on both morphological features and molecular data, T. malaysiensis is proposed as a junior synonym of T. macfarlanei based on ICZN’s law of priority. Also more female characters are prompted in this study to distinctly discriminate T. macfarlanei from its most resembling species, Tetranychus ludeni Zacher. Tetranychus macfarlanei has emerged as a pest of several cultivated crop plants in India.

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Spider mites (Acari: Tetranychidae) in protected natural areas of Serbia

Systematic and Applied Acarology ◽

10.11158/saa.23.10.12 ◽

2018 ◽

Vol 23 (10) ◽

pp. 2033

Author(s):

Ivana Marić ◽

Irena Međo ◽

Slobodan Jovanović ◽

Radmila Petanović ◽

Dejan Marčić

Keyword(s):

Plant Species ◽

Host Plants ◽

Spider Mite ◽

Spider Mites ◽

Mite Species ◽

Southeast Europe ◽

Natural Areas ◽

Relict Species ◽

Protected Natural Areas ◽

New Hosts

Despite economic importance of Tetranychidae, knowledge regarding diversity of spider mites in the Balkan Peninsula and Southeast Europe is incomplete, especially in protected natural areas. This study presents diversity of spider mites (Acari: Tetranychidae) collected over five growing seasons at 296 locations in 38 protected natural areas of Serbia. A total of 31 spider mite species were found, 10 from Bryobiinae and 21 from Tetranychinae. The species Eotetranychus fagi Zacher was recorded as new to Serbia and this record was also the first one for Southeast Europe. Spider mites were found on host plants in five basic types as well as many subtypes of terrestrial habitats, with woodland as the most dominant one. A total of 151 plant species from 44 families were recorded as hosts for spider mites including new world records: 60 new hosts for family Tetranychidae and 41 new hosts for 21 spider mite species. Host plants from Rosaceae family harbored the highest number of spider mite species (16). A considerable number of species was found on host plants from the families Betulaceae (11), Asteraceae (10) and Sapindaceae (10). Two cosmopolitan spider mites, Tetranychus urticae Koch and Tetranychus turkestani Ugarov & Nikolskii, were clearly distinguished with 67 (7 new) and 43 (13 new) recorded host species, respectively; among newly recorded hosts for Tetranychidae family, these two mite species were found on 27 and 12 hosts, respectively. After the two most common species, the most striking was the presence of Bryobia praetiosa Koch with 24 (4 new) recorded host plants, followed by Amphitetranychus viennensis (Zacher), Eotetranychus carpini (Oudemans) and Bryobia rubrioculus (Scheuten), with 21 (7 new), 20 (6 new) and 16 (2 new) hosts, respectively. The remaining tetranychids were found on 1–9 host plant species. This study provided the first insight into diversity of tetranychids in Serbian protected areas. Further research in this field should focus on mites from host plants representative of specific areas and habitats, including endangered, endemic and relict species.

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Maize inbred line B96 is the source of large-effect loci for resistance to generalist but not specialist spider mites

10.1101/2021.02.04.429847 ◽

2021 ◽

Author(s):

Huyen Bui ◽

Robert Greenhalgh ◽

Gunbharpur S. Gill ◽

Meiyuan Ji ◽

Andre H. Kurlovs ◽

...

Keyword(s):

Zea Mays ◽

Tetranychus Urticae ◽

European Corn Borer ◽

Spider Mite ◽

Insect Pests ◽

Spider Mites ◽

Mite Species ◽

Chromosome 1 ◽

Corn Borer ◽

Oligonychus Pratensis

AbstractMaize (Zea mays subsp. mays) yield loss from arthropod herbivory is substantial. While the basis of resistance to major insect herbivores has been comparatively well-studied in maize, less is known about resistance to spider mite herbivores, which are distantly related to insects and feed by a different mechanism. Two spider mites, the generalist Tetranychus urticae, and the grass-specialist Oligonychus pratensis, are notable pests of maize, especially during drought conditions. We assessed the resistance to both mite species of 38 highly diverse maize lines, including several previously reported to be resistant to one or the other mite species. We found that line B96, as well as its derivatives B49 and B75, were highly resistant to T. urticae. In contrast, neither these three lines, nor any others included in our study, were notably resistant to O. pratensis. Quantitative trait locus (QTL) mapping with F2 populations from crosses of B49, B75, and B96 to susceptible B73 identified a large-effect QTL on chromosome 6 as underlying T. urticae resistance in each line, with an additional QTL on chromosome 1 in B96. Genome sequencing and haplotype analyses identified B96 as the apparent sole source of resistance haplotypes. Our study identifies loci for use in maize breeding programs for T. urticae resistance, as well as to assess if the molecular-genetic basis of spider mite resistance is shared with insect pests of maize, as B96 is also among the most resistant known maize lines to several insects, including the European corn borer, Ostrinia nubilalis.Key message Maize(Zea mays subsp. mays) inbred lines B49, B75, and B96 harbor large-effect loci for resistance to the generalist spider mite Tetranychus urticae, but not the specialist Oligonychus pratensis.

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An LED-based UV-B irradiation system for tiny organisms: System description and demonstration experiment to determine the hatchability of eggs from four Tetranychus spider mite species from Okinawa

Journal of Insect Physiology ◽

10.1016/j.jinsphys.2014.01.005 ◽

2014 ◽

Vol 62 ◽

pp. 1-10 ◽

Cited By ~ 15

Author(s):

Takeshi Suzuki ◽

Yoshio Yoshioka ◽

Olga Tsarsitalidou ◽

Vivi Ntalia ◽

Suguru Ohno ◽

...

Keyword(s):

Spider Mite ◽

Mite Species ◽

System Description ◽

Irradiation System ◽

Demonstration Experiment

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Varying responses to combined water-stress and herbivory in maize for spider mite species that differ in host specialization

Environmental and Experimental Botany ◽

10.1016/j.envexpbot.2020.104131 ◽

2020 ◽

Vol 177 ◽

pp. 104131

Author(s):

Gunbharpur S. Gill ◽

Huyen Bui ◽

Richard M. Clark ◽

Ricardo A. Ramirez

Keyword(s):

Water Stress ◽

Spider Mite ◽

Mite Species ◽

Host Specialization

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Leprosis mite and other mite species (Acari) associated to orange groves in Brazilian Central Amazon

Systematic and Applied Acarology ◽

10.11158/saa.23.3.4 ◽

2018 ◽

Vol 23 (3) ◽

pp. 449 ◽

Cited By ~ 1

Author(s):

C. T. FERREIRA ◽

C. KRUG ◽

M. V.B. GARCIA ◽

G. J. De MORAES

Keyword(s):

Plant Species ◽

Predatory Mites ◽

Mite Species ◽

Lantana Camara ◽

Central Amazon ◽

Northern Brazil ◽

Citrus Leprosis ◽

Amazonas State ◽

Orange Trees ◽

Citrus Trees

The citrus leprosis mite, Brevipalpus yothersi Baker, is not considered to cause major damage to orange trees in the Brazilian Amazonas state. However, little is known about the diversity of plant mites and about mite damage to plants in this state of northern Brazil. The objective of the present study was to evaluate the level of occurrence of the leprosis mite in this region and the diversity and prevailing population levels of associated mites in unsprayed orange groves of the surroundings of Manaus, Amazonas state. In total, 1,614 mites were collected on citrus trees (616 of eminently predatory groups, 541 of eminently phytophagous groups and 457 of other groups). On plants growing spontaneously in orange groves, 514 mites were collected (270 of eminently predatory groups, 26 of eminently phytophagous groups and 218 of other groups). Most predators collected (638 specimens) belonged to Phytoseiidae, representing 14 species. The most abundant phytoseiids were Amblyseius aerialis Muma and Iphiseiodes zuluagai Denmark & Muma. Only 197 B. yothersi were collected, on leaves of orange, Lantana camara L. and Solanum paniculatum L.. Leprosis symptoms were not observed, and this may be related to the relatively low densities of the leprosis mite. The plant species Borreria verticillata (L.), Clidenia hirta (L.), L. camara, Paspalum virgatum L. and S. paniculatum are reservoirs of two abundant predatory mites of orange trees, A. aerialis and I. zuluagai.

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