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Experimental & Applied Acarology

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https://www.readbyqxmd.com/read/28526953/mutual-interference-between-adult-females-of-galendromus-flumenis-acari-phytoseiidae-feeding-on-eggs-of-banks-grass-mite-decreases-predation-efficiency-and-increases-emigration-rate
#1
Fatemeh Ganjisaffar, Gösta Nachman, Thomas M Perring
The Banks grass mite, Oligonychus pratensis (Banks) (Acari: Tetranychidae) causes significant damage to dates in California (USA), if not controlled. Studies are underway to develop biological control strategies against this pest in dates using the predatory mite Galendromus flumenis (Chant) (Acari: Phytoseiidae). In California date gardens, this predator is found in low numbers that are insufficient for the economic suppression of Banks grass mites, and our research aims to understand why it fails to keep up with prey densities...
May 19, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28509945/ant-mediated-indirect-negative-effects-of-aphids-on-spider-mites-living-on-the-same-plant
#2
Masaaki Adachi, Shuichi Yano
Some aphid species are known to have mutualistic relationships with tending ants; that is, the aphids supply the ants with honeydew and are protected by the ants. Although spider mites and honeydew-producing aphids often live on the same host plant, it has not previously been determined whether the ants tending these aphids affect spider mite survival. Using replicated microcosms, each containing an artificial ant nest, we compared experimentally the survival of two-spotted spider mites on kidney bean plants with and without cowpea aphids...
May 16, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28500468/rickettsia-spp-in-dermacentor-marginatus-ticks-analysis-of-the-host-vector-pathogen-interactions-in-a-northern-mediterranean-area
#3
Marco Selmi, Marco Ballardini, Laura Salvato, Enrica Ricci
In this work, we have analyzed the key features of Rickettsia spp. maintenance in Dermacentor marginatus ticks in four regions of the northern Mediterranean area, where extensive investigations are currently lacking. For this purpose, 380 adult D. marginatus ticks were collected from vegetation and wild ungulates during a 3-year study. A host-vector-pathogen interaction approach was applied to investigate the key components of the disease systems and evaluate their respective weight in the intensity of infection in natural foci...
May 12, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28497304/acaricidal-activity-of-havardia-albicans-and-caesalpinia-gaumeri-methanolic-leaf-extracts-on-rhipicephalus-microplus-and-its-toxicity-to-laboratory-animals
#4
José A Rosado-Aguilar, Roger I Rodríguez-Vivas, Rocío Borges-Argaez, Karen A Arjona-Cambranes
The acaricidal activity of methanolic extracts from the leaves of Havardia albicans (Kunth Britton and Rose) and Caesalpinia gaumeri (Greenm) were tested on the larvae and adults of the cattle tick Rhipicephalus microplus Canestrini using the larval immersion test and the adult immersion test, respectively. The toxicity of these extracts was also evaluated on laboratory animals using toxicity bioassays at different concentrations: skin irritability (500 mg/ml), acute oral toxicity (5000 mg/kg), ocular irritability (1000 mg/ml) and dermal toxicity (5000 mg/kg)...
May 11, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28497303/review-of-cattle-ticks-acari-ixodida-in-ivory-coast-and-geographic-distribution-of-rhipicephalus-boophilus-microplus-an-emerging-tick-in-west-africa
#5
O M Boka, L Achi, H Adakal, A Azokou, P Yao, Y G Yapi, M Kone, K Dagnogo, Y Y Kaboret
The exotic tick Rhipicephalus (Boophilus) microplus was discovered in Ivory Coast in 2007 and then gradually in other countries in West Africa. It is known to induce significant losses in farming and to replace other species of the same genus. In order to contribute to improve health and productivity of cattle in Ivory Coast regarding the emergence of this dreaded tick, a study was conducted to determine the current geographic distribution of the tick R. (B.) microplus and review cattle ticks in general. To this end, 23,460 ticks were collected from 180 farms located throughout the country...
May 11, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28497302/keys-for-the-morphological-identification-of-the-australian-paralysis-ticks-acari-ixodidae-with-scanning-electron-micrographs
#6
Mackenzie Lamont Kwak
The Australian paralysis ticks (Ixodes: Sternalixodes) are of considerable medical and veterinary importance within Australia. This is because of their ability to cause paralysis but also their capacity to transmit pathogens and induce allergic reactions. The available keys for the identification of the group (Ixodes holocyclus Neumann, Ixodes cornuatus Roberts, and Ixodes hirsti Hassall) are ambiguous and contain errors, making accurate identification of the group difficult. Illustrations of varying quality and accuracy of these species have been published in the past; however, they have never been collectively treated using scanning electron microscopy (SEM)...
May 11, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28493037/toxicity-of-vegetable-oils-to-the-coconut-mite-aceria-guerreronis-and-selectivity-against-the-predator-neoseiulus-baraki
#7
Natália N F C Oliveira, Andreia S Galvão, Ester A Amaral, Auderes W O Santos, José G Sena-Filho, Eugenio E Oliveira, Adenir V Teodoro
The coconut mite, Aceria guerreronis (Acari: Eriophyidae), is a major tropical pest of coconut. Here, we assessed the chemical profiles and the potential use of babassu, degummed soybean, and coconut oils to control A. guerreronis as well as their side-effects on the predatory mite Neoseiulus baraki (Acari: Phytoseiidae), a key natural enemy of the coconut mite. Babassu and coconut oils had similar fatty acids chemical profiles. All vegetable oils showed toxicity to A. guerreronis; degummed soybean oil exhibited the highest toxicity (LC50 = 0...
May 10, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28493036/life-cycle-of-amblyomma-oblongoguttatum-acari-ixodidae-under-laboratory-conditions
#8
Thiago F Martins, Hermes R Luz, João Luiz H Faccini, Marcelo B Labruna
This study evaluated for the first time the life cycle of Amblyomma oblongoguttatum in the laboratory. For this purpose, larvae and nymphs were exposed to Gallus gallus (chicks), Rattus norvegicus (wistar rat), Calomys callosus (vesper mouse), Oryctolagus cuniculus (domestic rabbit), Cavia porcellus (guinea pig), and Didelphis albiventris (white-eared opossum). Nymphs were exposed to G. gallus, C. callosus, C. porcellus, O. cuniculus, R. norvegicus, and Nectomys squamipes (water rat). Adult ticks were exposed to domestic dogs...
May 10, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28432470/male-behavioural-plasticity-depends-on-maternal-mating-status-in-the-two-spotted-spider-mite
#9
Keiko Oku, Tom P G van den Beuken
In haplodiploid organisms including the two-spotted spider mite, Tetranychus urticae (Acari: Tetranychidae), both unmated and mated females can produce male offspring. A previous study reported that males produced by unmated females (UM males) find pre-reproductive females more quickly than males produced by mated females (M males) in T. urticae. However, it remains unclear what factors cause the difference. We investigated effects of maternal mating status on mate-searching behaviour of their sons by changing the sons' developmental environment...
April 21, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28429108/phenetic-and-phylogenetic-relationships-among-aceria-spp-acari-eriophyoidea-inhabiting-species-within-the-family-brassicaceae-in-serbia
#10
Zlata Živković, Biljana Vidović, Vida Jojić, Tatjana Cvrković, Radmila Petanović
We examined morphological and genetic differences among Aceria spp. inhabiting six Brassicaceae species in Serbia. Five of them have been already mentioned in the literature as original or alternate hosts of Aceria spp. (Berteroa incana (L.) DC., Capsella bursa-pastoris (L.) Medik., Cardamine hirsuta L., Lepidium draba L. and Sisymbrium orientale L.), whereas Aurinia petraea (Ard.) Schur was registered here for the first time as a host for Aceria sp. Results of morphometric analyses indicated clear differentiation of Aceria spp...
April 20, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28417248/ticks-and-tick-borne-pathogens-of-dogs-along-an-elevational-and-land-use-gradient-in-chiriqu%C3%A3-province-panam%C3%A3
#11
A Michelle Ferrell, R Jory Brinkerhoff, Juan Bernal, Sergio E Bermúdez
Systematic acarological surveys are useful tools in assessing risk to tick-borne infections, especially in areas where consistent clinical surveillance for tick-borne disease is lacking. Our goal was to identify environmental predictors of tick burdens on dogs and tick-borne infectious agents in dog-derived ticks in the Chiriquí Province of western Panama to draw inferences about spatio-temporal variation in human risk to tick-borne diseases. We used a model-selection approach to test the relative importance of elevation, human population size, vegetative cover, and change in landuse on patterns of tick parasitism on dogs...
April 17, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28417247/influence-of-environmental-temperature-and-humidity-on-questing-ticks-in-central-spain
#12
F Requena-García, F Cabrero-Sañudo, S Olmeda-García, Julia González, F Valcárcel
Ticks are important ectoparasites and vectors of the pathogens that cause disease in humans and animals. At a natural reserve in Ciudad Real (Spain), an uncontrollable infestation of wild animals with Hyalomma lusitanicum (Koch) has been reported by some game reserve owners. Many questions about distribution, abundance, and phenology of this tick in this area remain unanswered. The aim of this study was to determine if temperature and relative humidity affect the questing tick's activity in four species of ticks in a meso-Mediterranean area, especially that of H...
April 17, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28409404/phenotypic-and-genotypic-identification-of-hard-ticks-of-the-genus-haemaphysalis-acari-ixodidae-in-peninsular-malaysia
#13
F C L Ernieenor, G Ernna, A Mariana
Morphotaxonomy based on phenotypic traits of immature hard ticks (Acari: Ixodidae) is a skill challenge and has prompted many inexperienced acarologists to adopt DNA-based methods for identifying and discriminating the species. The aim of this study is therefore to utilize COI gene for verifying the morphological status of Haemaphysalis ticks in Peninsular Malaysia. A total of 19 on-host ticks collected from four localities were first identified using specific illustrated taxonomic keys that lead to the genus of Haemaphysalis...
April 13, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28405840/increased-activities-of-peroxidase-and-polyphenol-oxidase-enhance-cassava-resistance-to-tetranychus-urticae
#14
Xiao Liang, Qing Chen, Hui Lu, Chunling Wu, Fuping Lu, Jihong Tang
In order to study the function of peroxidase (POD) and polyphenol oxidase (PPO) in cassava resistance to spider mites, we tested the changes of transcription levels and activities of these two protective enzymes in both cassava and Tetranychus urticae (=T. cinnabarinus) during the interaction. The results showed that after damage of the mite-susceptible cassava cultivar BRA900 by T. urticae for 1 and 8 days, the transcription levels of MePOD and MePPO and the activities of POD and PPO showed no significant difference compared with those in undamaged leaves...
April 12, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28405839/molecular-and-morphological-identification-of-a-human-biting-tick-amblyomma-testudinarium-acari-ixodidae-in-taiwan
#15
Li-Lian Chao, Chun-Wei Lu, Ying-Fang Lin, Chien-Ming Shih
Genetic identity and morphological features of a human biting tick, Amblyomma testudinarium, were determined for the first time in Taiwan. Morphological features of adult male and female ticks of Am. testudinarium were observed and photographed by a stereo- microscope. The genetic identity was analyzed by comparing the sequences of mitochondrial 16S ribosomal DNA gene obtained from 18 strains of ticks representing 10 species of Amblyomma, and four outgroup species of Dermacentor and Rhipicephalus ticks. Nine major clades could be easily distinguished by neighbour-joining analysis and were congruent by maximum-parsimony method...
April 12, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28405838/acaricidal-and-sublethal-effects-of-a-chenopodium-based-biopesticide-on-the-two-spotted-spider-mite-acari-tetranychidae
#16
Asma Musa, Irena Međo, Ivana Marić, Dejan Marčić
Acaricidal and sublethal effects of the biopesticide Requiem(®)EC (containing an essential oil extract of Chenopodium ambrosioides near ambrosioides) on the two-spotted spider mite, Tetranychus urticae Koch, were evaluated in laboratory bioassays. The biopesticide was applied to bean leaves or leaf discs using a Potter spray tower. Acaricidal activity against eggs and immatures was evaluated in successive acute toxicity bioassays. Concentration-mortality data were subjected to probit analysis and the following LC50 values (ml/l) were calculated: 2...
April 12, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28405837/the-nuclear-28s-gene-fragment-d3-as-species-marker-in-oribatid-mites-acari-oribatida-from-german-peatlands
#17
Ricarda Lehmitz, Peter Decker
To make oribatid mites an applicable tool in monitoring programs it is necessary to find a molecular species marker that allows distinct, rapid and easy species identification. In previous studies, the common barcoding sequence COI showed to be too variable to serve as species marker in oribatid mites. The aim of the present study is to evaluate the potential use of the D3 region of the nuclear 28S rDNA gene for species identification. Therefore, we generated a reference DNA library of 28S D3 to identify specimens of the Oribatida from Germany, with focus on species occurring in peatlands being one of the most endangered habitats in Europe...
April 12, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28251410/detection-of-amitraz-and-malathion-resistance-in-field-populations-of-rhipicephalus-boophilus-microplus-acari-ixodidae-in-jammu-region-of-india
#18
S Dutta, R Godara, R Katoch, A Yadav, M Katoch, N K Singh
Detection of resistance levels against amitraz and malathion in Rhipicephalus (Boophilus) microplus collected from four districts of Jammu region (India) was carried out using the adult immersion test. The regression graphs of probit mortality of ticks plotted against log values of concentration of drugs were utilised for the determination of slope of mortality, lethal concentration for 50% (LC50), 95% (LC95) and resistance factor (RF). On the basis of the data generated on variables (mortality, egg mass weight, reproductive index and percentage inhibition of oviposition) the resistance level was categorised as I, II, III and IV...
March 1, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28251408/in-vitro-assessment-of-the-acaricidal-activity-of-piper-longum-piper-nigrum-%C3%A2-and-zingiber-officinale-extracts-against-hyalomma-anatolicum-ticks
#19
Nirbhay K Singh, S P S Saini, Harkirat Singh, Jyoti, S K Sharma, S S Rath
Ticks and tick-borne diseases are a major constraint for the sustainable cattle industry in the tropical and subtropical regions including the Indian subcontinent. The development of resistance to most of the commonly used acaricides leads to an attempt to screen plant extracts and their combinations for their possible acaricidal activity to develop an eco-friendly tick control alternative. An alcoholic and various aqueous extracts of Piper longum, Piper nigrum and Zingiber officinale and their combinations were evaluated for acaricidal activity against the three-host ixodid tick, Hyalomma anatolicum by larval immersion test using 14-21 days old unfed larvae...
March 1, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28417249/virus-vector-relationship-in-the-citrus-leprosis-pathosystem
#20
Aline Daniele Tassi, Laura Cristina Garita-Salazar, Lilian Amorim, Valdenice Moreira Novelli, Juliana Freitas-Astúa, Carl C Childers, Elliot W Kitajima
Citrus leprosis has been one of the most destructive diseases of citrus in the Americas. In the last decade important progress has been achieved such as the complete genome sequencing of its main causal agent, Citrus leprosis virus C (CiLV-C), belonging to a new genus Cilevirus. It is transmitted by Brevipalpus yothersi Baker (Acari: Tenuipalpidae), and is characterized by the localized symptoms it induces on the leaves, fruits and stems. It occurs in the American continents from Mexico to Argentina. The virus was until recently considered restricted to Citrus spp...
March 2017: Experimental & Applied Acarology
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