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tetranychus urticae

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https://www.readbyqxmd.com/read/29879571/encapsulation-of-satureja-hortensis-l-lamiaceae-in-chitosan-tpp-nanoparticles-with-enhanced-acaricide-activity-against-tetranychus-urticae-koch-acari-tetranychidae
#1
Zeinab Ahmadi, Moosa Saber, Ali Akbari, Gholam Reza Mahdavinia
The objective of this study was the fabrication of encapsulated Satureja hortensis essential oil (S.EO) in chitosan/tripolyphosphate nanoparticles (CS/TPP-NPs) via ionic gelation technique and investigation of its acaricidal effect. A high encapsulation efficiency of 96.17% was obtained, which shows successful encapsulation of EOs in CS-TPP nanoparticles. Transmission electron microscopy (TEM) analysis proved the formation of spherical S. hortensis EO-loaded chitosan nanoparticles (S.EO@NPs). Fourier-transform infrared spectroscopy (FTIR) analysis demonstrated the presence of encapsulated S...
June 4, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29769620/carvacrol-and-linalool-co-loaded-in-%C3%AE-cyclodextrin-grafted-chitosan-nanoparticles-as-sustainable-biopesticide-aiming-pest-control
#2
Estefânia V R Campos, Patrícia L F Proença, Jhones L Oliveira, Anderson E S Pereira, Lígia Nunes de Morais Ribeiro, Fabrício O Fernandes, Kelly C Gonçalves, Ricardo A Polanczyk, Tatiane Pasquoto-Stigliani, Renata Lima, Cirano C Melville, Jaqueline F Della Vechia, Daniel J Andrade, Leonardo F Fraceto
Pesticides are the main tactics for pest control because they reduce the pest population very fast and their efficiency does not depend on abiotic factors. However, the indiscriminate use of these substances can speed up the development of resistant populations and causing environmental contamination. Therefore, alternative methods of pest control are sought, such as the use of botanical compounds. Nanoencapsulation of volatile compounds has been shown to be an important tool that can be used to overcome the lack of stability of these compounds...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29768484/herbivory-responsive-calmodulin-like-protein-cml9-does-not-guide-jasmonate-mediated-defenses-in-arabidopsis-thaliana
#3
Monika Heyer, Sandra S Scholz, Dagmar Voigt, Michael Reichelt, Didier Aldon, Ralf Oelmüller, Wilhelm Boland, Axel Mithöfer
Calcium is an important second messenger in plants that is released into the cytosol early after recognition of various environmental stimuli. Decoding of such calcium signals by calcium sensors is the key for the plant to react appropriately to each stimulus. Several members of Calmodulin-like proteins (CMLs) act as calcium sensors and some are known to mediate both abiotic and biotic stress responses. Here, we study the role of the Arabidopsis thaliana CML9 in different stress responses. CML9 was reported earlier as defense regulator against Pseudomonas syringae...
2018: PloS One
https://www.readbyqxmd.com/read/29767731/development-and-reproduction-of-neoseiulus-californicus-acari-phytoseiidae-and-tetranychus-urticae-acari-tetranychidae-under-simulated-natural-temperature
#4
Noureldin Abuelfadl Ghazy, Takeshi Suzuki, Hiroshi Amano
Although laboratory observations provide basic knowledge of the development and reproduction of predacious and phytophagous mites, little is known of their behavior under natural conditions. Using a closed system designed to simulate natural climate patterns, we investigated the development and reproduction of the predatory mite Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) and the pest mite Tetranychus urticae Koch (Acari: Tetranychidae) at air temperatures typical of June to October at three latitudes (Aomori, Tottori, and Naha) in Japan...
May 14, 2018: Environmental Entomology
https://www.readbyqxmd.com/read/29761305/uv-b-susceptibility-and-photoreactivation-in-embryonic-development-of-the-two-spotted-spider-mite-tetranychus-urticae
#5
Yoshio Yoshioka, Tetsuo Gotoh, Takeshi Suzuki
Developmental errors are often induced in the embryos of many organisms by environmental stress. Ultraviolet-B radiation (UV-B) is one of the most serious environmental stressors in embryonic development. Here, we investigated susceptibility to UV-B (0.5 kJ m-2 ) in embryos of the two-spotted spider mite, Tetranychus urticae, to examine the potential use of UV-B in control of this important agricultural pest worldwide. Peak susceptibility to UV-B (0% hatchability) was found in T. urticae eggs 36-48 h after oviposition at 25 °C, which coincides with the stages of morphogenesis forming the germ band and initial limb primordia...
May 14, 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29757437/fumigation-activity-of-ethyl-formate-and-phosphine-against-tetranychus-urticae-acari-tetranychidae-on-imported-sweet-pumpkin
#6
Jae Seon Lee, Hyun Kyung Kim, Yejin Kyung, Geun-Ho Park, Byung-Ho Lee, Jeong-Oh Yang, Hyun-Na Koo, Gil-Hah Kim
This study investigated an alternative fumigant for imported sweet pumpkin. Laboratory fumigations with ethyl formate (EF) and phosphine (PH3) alone and in combination were conducted at different temperatures in 12-liter desiccators to determine their efficacy and synergism against adults and eggs of two-spotted spider mites (Tetranychus urticae Koch), a major pest of sweet pumpkins; larger scale fumigations with EF were also performed to evaluate the impact of EF fumigation on the postharvest quality of sweet pumpkin and EF absorption...
May 10, 2018: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29688599/uv-c-irradiation-as-a-management-tool-for-tetranychus-urticae-on-strawberries
#7
Brent D Short, Wojciech Janisiewicz, Fumiomi Takeda, Tracy C Leskey
BACKGROUND: Tetranychus urticae Koch, the two-spotted spider mite, is a highly polyphagous and worldwide pest of many agricultural crops, including fruit, vegetables, and ornamentals. Typical methods of control include applications of acaricides and biological control agents. Here, we present a non-chemical technology for management of T. urticae on strawberry plants through the use of a nightly short-duration ultraviolet-C (UV-C) irradiation treatment. RESULTS: Potted strawberry plants infested with T...
April 24, 2018: Pest Management Science
https://www.readbyqxmd.com/read/29681917/dehydration-stress-contributes-to-the-enhancement-of-plant-defense-response-and-mite-performance-on-barley
#8
M E Santamaria, Isabel Diaz, Manuel Martinez
Under natural conditions, plants suffer different stresses simultaneously or in a sequential way. At present, the combined effect of biotic and abiotic stressors is one of the most important threats to crop production. Understanding how plants deal with the panoply of potential stresses affecting them is crucial to develop biotechnological tools to protect plants. As well as for drought stress, the economic importance of the spider mite on agriculture is expected to increase due to climate change. Barley is a host of the polyphagous spider mite Tetranychus urticae and drought produces important yield losses...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29678924/sirnas-and-pirnas-collaborate-for-transposon-control-in-the-two-spotted-spider-mite
#9
Mosharrof Mondal, Kody Mansfield, Alex Flynt
RNAi has revolutionized genetic research, and is being commercialized as an insect pest control technology. Mechanisms exploited for this purpose are antiviral and therefore rapidly evolving. Ideally, RNAi will also be used for non-insect pests, however, differences in RNAi biology makes this uncertain. Tetranychus urticae (two-spotted spider mite) is a destructive non-insect pest, which has a proclivity to develop pesticide resistance. Here we provide a comprehensive study of the endogenous RNAi pathways of spider mites to inform design of exogenous RNAi triggers...
April 20, 2018: RNA
https://www.readbyqxmd.com/read/29611070/pathogenic-differences-of-the-entomopathogenic-fungus-isaria-cateniannulata-to-the-spider-mite-tetranychus-urticae-trombidiformes-tetranychidae-and-its-predator-euseius-nicholsi-mesostigmata-phytoseiidae
#10
Xiao-Na Zhang, Jian-Jun Guo, Xiao Zou, Dao-Chao Jin
Isaria cateniannulata and Euseius nicholsi are two important biological control agents currently being used in many areas of China to control a variety of pests. In order to determine the possibility of a concomitant application with the two agents in a biocontrol program involving the two-spotted spider mite, Tetranychus urticae, we quantified the pathogenicity of a strain of I. cateniannulata (08XS-1) against females of both T. urticae and E. nicholsi. We observed the infection process using scanning electron microscopy and fluorescence microscopy to distinguish differences in fungal performance...
May 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29608276/engineered-reciprocal-chromosome-translocations-drive-high-threshold-reversible-population-replacement-in-drosophila
#11
Anna B Buchman, Tobin Ivy, John M Marshall, Omar S Akbari, Bruce A Hay
Replacement of wild insect populations with transgene-bearing individuals unable to transmit disease or survive under specific environmental conditions using gene drive provides a self-perpetuating method of disease prevention. Mechanisms that require the gene drive element and linked cargo to exceed a high threshold frequency in order for spread to occur are attractive because they offer several points of control: they bring about local, but not global population replacement; and transgenes can be eliminated by reintroducing wildtypes into the population so as to drive the frequency of transgenes below the threshold frequency required for drive...
May 18, 2018: ACS Synthetic Biology
https://www.readbyqxmd.com/read/29600387/the-responses-of-cucumber-plants-subjected-to-different-salinity-or-fertilizer-concentrations-and-reproductive-success-of-tetranychus-urticae-mites-on-these-plants
#12
Samira Khodayari, Fatemeh Abedini, David Renault
The plant stress hypothesis posits that a herbivore's reproductive success increases when it feeds on stressed plants, while the plant vigor hypothesis predicts that a herbivore preferentially feeds on more vigorous plants. We examined these opposing hypotheses by growing spider mites (Tetranychus urticae) on the leaves of stressed and healthy (vigorous) cucumber plants. Host plants were grown under controlled conditions at low, moderate, and high concentrations of NaCl (to induce salinity stress), at low, moderate, and high fertilizer concentrations (to support growth), and without these additions (control)...
May 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29594845/efficacy-of-carbon-dioxide-treatments-for-the-control-of-the-two-spotted-spider-mite-tetranychus-urticae-and-treatment-impact-on-plant-seedlings
#13
Ya-Jun Gong, Li-Jun Cao, Ze-Hua Wang, Xiao-Yi Zhou, Jin-Cui Chen, Ary Anthony Hoffmann, Shu-Jun Wei
To develop a new control method for the two-spotted spider mite (TSSM), Tetranychus urticae, we investigated the effect of controlled atmospheres of carbon dioxide (CO2 ) on TSSM mortality under different concentrations and treatment periods, and evaluated the impact of treatments on seedlings of five host plants of TSSM. Egg hatching rate of TSSM was reduced to 37.7, 5.4 or 0% after 24 h treatment involving concentrations of 16.7, 33.3 or 50%, respectively. Mobile stages (nymphs and adult) of TSSM were completely controlled after 24 h treatment at concentrations higher than 33...
March 28, 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29566459/enormous-expansion-of-the-chemosensory-gene-repertoire-in-the-omnivorous-german-cockroach-blattella-germanica
#14
Hugh M Robertson, Rachel L Baits, Kimberly K O Walden, Ayako Wada-Katsumata, Coby Schal
The acquisition of genome sequences from a wide range of insects and other arthropods has revealed a broad positive correlation between the complexity of their chemical ecology and the size of their chemosensory gene repertoire. The German cockroach Blattella germanica is an extreme omnivore and has the largest chemosensory gene repertoire known for an arthropod, exceeding even the highly polyphagous spider mite Tetranychus urticae. While the Odorant Receptor family is not particularly large, with 123 genes potentially encoding 134 receptors (105 intact), the Gustatory Receptor family is greatly expanded to 431 genes potentially encoding 545 receptors (483 intact), the largest known for insects and second only to the spider mite...
March 22, 2018: Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
https://www.readbyqxmd.com/read/29524004/antixenosis-and-antibiosis-response-of-common-bean-phaseolus-vulgaris-to-two-spotted-spider-mite-tetranychus-urticae
#15
Marie Shoorooei, Abdul Hadi Hoseinzadeh, Reza Maali-Amiri, Hossein Allahyari, Masoud Torkzadeh-Mahani
The two-spotted spider mite, Tetranychus uticae Koch (Acari: Tetranychidae), is globally one of the most devastating pests that feed on numerous crops, including common bean (Phaseolus vulgaris L.). This study was aimed to evaluate the effects of genotype and morphological attributes of common bean on T. uticae. Forty common bean accessions were used to investigate antixenosis and antibiosis through assessing mite feeding preference and reproduction under laboratory conditions. Three resistant (i.e., 56, 63, 238) and two susceptible (i...
April 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29520527/sublethal-effects-of-spirodiclofen-abamectin-and-pyridaben-on-life-history-traits-and-life-table-parameters-of-two-spotted-spider-mite-tetranychus-urticae-acari-tetranychidae
#16
Moosa Saber, Zeinab Ahmadi, Gholamreza Mahdavinia
Two-spotted spider mite, Tetranychus urticae Koch, is one of the economically most important pests on a wide range of crops in greenhouses and orchards worldwide. Control of T. urticae has been largely based on the use of acaricides. Sublethal effects of spirodiclofen, pyridaben and abamectin were studied on life-table parameters of T. urticae females treated with the acaricides. LC25 values of spirodiclofen, abamectin and pyridaben (3.84, 0.04 and 136.96 µg a.i./ml, respectively) were used for sublethal studies...
May 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29516379/effect-of-temperature-on-development-and-reproduction-of-the-carmine-spider-mite-tetranychus-cinnabarinus-acari-tetranychiae-fed-on-cassava-leaves
#17
Zhiwen Zou, Jianfei Xi, Ge Liu, Shuxian Song, Tianrong Xin, Bin Xia
The effect of five constant temperatures (16, 20, 24, 28 and 32 °C) on the development, survival and reproduction of Tetranychus cinnabarinus (Boisduval) [= Tetranychus urticae Koch (red form)] fed on cassava leaves was examined in the laboratory at 85% relative humidity. Development time of various immature stages decreased with increasing temperature, with total egg-to-adult development time varying from 27.7 to 6.7 days. The lower thermal threshold for development was 10.8 °C and the thermal constant from egg to adult was 142...
April 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29494488/overexpression-of-hvicy6-in-barley-enhances-resistance-against-tetranychus-urticae-and-entails-partial-transcriptomic-reprogramming
#18
M Estrella Santamaria, Mercedes Diaz-Mendoza, David Perez-Herguedas, Goetz Hensel, Jochen Kumlehn, Isabel Diaz, Manuel Martinez
Cystatins have been largely used for pest control against phytophagous species. However, cystatins have not been commonly overexpressed in its cognate plant species to test their pesticide capacity. Since the inhibitory role of barley HvCPI-6 cystatin against the phytophagous mite Tetranychus urticae has been previously demonstrated, the purpose of our study was to determine if barley transgenic lines overexpressing its own HvIcy6 gene were more resistant against this phytophagous infestation. Besides, a transcriptomic analysis was done to find differential expressed genes among wild-type and transformed barley plants...
March 1, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29490054/acaricide-mediated-competition-between-the-sibling-species-tetranychus-cinnabarinus-and-tetranychus-urticae
#19
Wencai Lu, Yuan Hu, Peng Wei, Qiang Xu, Christian Bowman, Ming Li, Lin He
The carmine spider mite (Tetranychus cinnabarinus [Acarifonnes: Tetranychidae]) and the two-spotted spider mite (Tetranychus urticae [Acarifonnes: Tetranychidae]) are two notorious pests of agricultural crops. Control of these pests has been dependent upon using different kinds of acaricides. The purpose of this study was to determine the differential responses of these two pest species collected from crops in the same field to acaricide treatments. Field trials have shown that without spraying acaricides, T...
February 27, 2018: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29478090/species-and-density-dependent-induction-of-volatile-organic-compounds-by-three-mite-species-in-cassava-and-their-role-in-the-attraction-of-a-natural-enemy
#20
Delia M Pinto-Zevallos, Ranna H S Bezerra, Silvia R Souza, Bianca G Ambrogi
Upon damage by herbivores, plants induce an array of volatile organic compounds (VOCs) that mediate ecological interactions involving communication with organisms of the second and third trophic levels. VOC-mediated tritrophic interactions have largely been studied in various systems, including cassava (Manihot esculenta), but little is known about the chemical nature of herbivore-induced VOCs in this crop and the response they evoke in natural enemies. Several tetranychid and predatory mites are associated with cassava...
March 2018: Experimental & Applied Acarology
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