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https://www.readbyqxmd.com/read/29126215/demonstration-and-quantification-of-restricted-mating-between-fall-armyworm-host-strains-in-field-collections-by-snp-comparisons
#1
Rodney N Nagoshi, Shelby Fleischer, Robert L Meagher
Gene introgression between related pest populations is an important component in the assessment of how rapidly economically important traits, such as pesticide resistance, can spread within a region. An example of this is provided by the noctuid moth Spodoptera frugiperda (J.E. Smith), or fall armyworm, which is composed of two 'host strains' that differ in their host plant preferences. Resistance to a Bacillus thuringiensis toxin has been observed in some populations and there is concern about its spread throughout the Western Hemisphere...
November 8, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29121518/genome-wide-identification-phylogenetic-analysis-and-expression-profiles-of-atp-binding-cassette-transporter-genes-in-the-oriental-fruit-fly-bactrocera-dorsalis-hendel-diptera-tephritidae
#2
Lin-Fan Xiao, Wei Zhang, Tian-Xing Jing, Meng-Yi Zhang, Ze-Qing Miao, Dan-Dan Wei, Guo-Rui Yuan, Jin-Jun Wang
The ATP-binding cassette (ABC) is the largest transporter gene family and the genes play key roles in xenobiotic resistance, metabolism, and development of all phyla. However, the specific functions of ABC gene families in insects is unclear. We report a genome-wide identification, phylogenetic, and transcriptional analysis of the ABC genes in the oriental fruit fly, Bactrocera dorsalis (Hendel). We identified a total of 47 ABC genes (BdABCs) from the transcriptomic and genomic databases of B. dorsalis and classified these genes into eight subfamilies (A-H), including 7 ABCAs, 7 ABCBs, 9 ABCCs, 2 ABCDs, 1 ABCE, 3 ABCFs, 15 ABCGs, and 3 ABCHs...
October 10, 2017: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/29109169/environmental-triazole-induces-cross-resistance-to-clinical-drugs-and-affects-morphophysiology-and-virulence-of-cryptococcus-gattii-and-c-neoformans
#3
Rafael Wesley Bastos, Hellem Cristina Silva Carneiro, Lorena Vívien Neves de Oliveira, Karen Maia Rocha, Gustavo José Cota Freitas, Marliete Carvalho Costa, Thaís Furtado Ferreira Magalhães, Vanessa Silva Dutra de Carvalho, Cláudia Emanuela Rocha, Gabriella Freitas Ferreira, Tatiane Alves de Paixão, Frédérique Moyrand, Guilhem Janbon, Daniel Assis Santos
Cryptococcus gattii and Cryptococcus neoformans are environmental fungi that cause cryptococcosis, which is usually treated with amphotericin B and fluconazole. However, therapeutic failure is increasing because of the emergence of resistant strains. Because these species are constantly isolated from vegetal materials and the usage of agrochemicals is growing, we postulate pesticides could be responsible for the altered susceptibility of these fungi to clinical drugs. Therefore, we evaluated the influence of the pesticide tebuconazole on the susceptibility to clinical drugs, morphophysiology, and virulence of C...
November 6, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29097282/isolation-of-carboxylesterase-esterase-fe4-from-apis-cerana-cerana-and-its-role-in-oxidative-resistance-during-adverse-environmental-stress
#4
Manli Ma, Haihong Jia, Xuepei Cui, Na Zhai, Hongfang Wang, Xingqi Guo, Baohua Xu
Carboxylesterases (CarEs) play vital roles in metabolising different physiologically important endogenous compounds and in detoxifying various harmful exogenous compounds in insects. Multiple studies of CarEs have focused on pesticide metabolism in insects, while few studies have aimed to identify CarE functions in oxidative resistance, particularly in Apis cerana cerana. In this study, we isolated a carboxylesterase gene, esterase FE4, from Apis cerana cerana and designated it towards an exploration of its roles as an antioxidant and in detoxification...
October 30, 2017: Biochimie
https://www.readbyqxmd.com/read/29080617/wash-resistance-and-bio-efficacy-of-olyset-%C3%A2-plus-a-long-lasting-insecticide-treated-mosquito-net-with-synergist-against-malaria-vector-anopheles-stephensi
#5
Soraya Sheikhi, Hassan Vatandoost, Mohammad Reza Abai, Mansoreh Shayeghi, Ahmad Raeisi, Morteza Akbari, Fatemeh Nikpoor, Mohammad Sistanizade Aghdam, Akbar Bagheri
OBJECTIVE: To determine the wash resistance of Olyset(®) Plus using World Health Organization Pesticide Evaluation Scheme standard washing procedure and to assess the value of knock down and mortality rates of Anopheles stephensi at different regimens of long lasting insecticide treated nets washings. METHODS: The study was conducted at the Bioassay Laboratory of Culicidae Insectary, School of Public Health, Tehran University of Medical Sciences, Iran. The net was made of polyester impregnated with permethrin and piperonyl butoxide at a ratio of 2:1...
September 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/29079626/compartmentalization-of-carbaryl-degradation-pathway-molecular-characterization-of-inducible-periplasmic-carbaryl-hydrolase-from-pseudomonas-spp
#6
Kamini Gautam, Dasvit Shetty, Vikas D Trivedi, Madhushri Varunjikar, Prashant S Phale
Pseudomonas sp. strains C5pp and C7 degrade carbaryl as the sole carbon source. Carbaryl hydrolase (CH) catalyzes the hydrolysis of carbaryl to 1-naphthol and methylamine. Bioinformatic analysis of mcbA encoding CH in C5pp predicted it to have a transmembrane domain (Tmd) and a signal peptide (Sp). In these isolates, the activity of CH was found to be 4 to 6-fold higher in the periplasm as compared to the cytoplasm. The recombinant CH (rCH) showed 4-fold higher activity in the periplasm of Escherichia coli The deletion of Tmd showed activity in the cytoplasmic fraction, while deletion of Tmd+Sp resulted in expression of the inactive protein...
October 27, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29079532/virulence-of-entomopathogenic-bacteria-in-the-bed-bug-cimex-lectularius
#7
Jose E Pietri, Dangsheng Liang
Due in part to the development of insecticide resistance, the common bed bug, Cimex lectularius, has overcome human intervention efforts to make a global resurgence. The failure of chemical pesticides has created a need for novel strategies to combat bed bugs. While a number of insect pests are susceptible to the use of entomopathogenic microbes or microbial-derived toxins, biological control methods have not been thoroughly explored in bed bugs. Here, we tested the virulence of three entomopathogenic bacterial species in C...
October 24, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29073935/human-health-implications-of-organic-food-and-organic-agriculture-a-comprehensive-review
#8
REVIEW
Axel Mie, Helle Raun Andersen, Stefan Gunnarsson, Johannes Kahl, Emmanuelle Kesse-Guyot, Ewa Rembiałkowska, Gianluca Quaglio, Philippe Grandjean
This review summarises existing evidence on the impact of organic food on human health. It compares organic vs. conventional food production with respect to parameters important to human health and discusses the potential impact of organic management practices with an emphasis on EU conditions. Organic food consumption may reduce the risk of allergic disease and of overweight and obesity, but the evidence is not conclusive due to likely residual confounding, as consumers of organic food tend to have healthier lifestyles overall...
October 27, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/29072801/microbiome-facilitated-pest-resistance-potential-problem-and-uses
#9
REVIEW
Jonathan Gressel
Microbiome organisms can degrade environmental xenobiotics including pesticides, conferring resistance to most types of pests. Some cases of pesticide resistance in insects, nematodes, and weeds are now documented to be due to microbiome detoxification, and is a demonstrated possibility with rodents. Some cases of metabolic resistance may have been misattributed to pest metabolism, and not to organisms in the microbiome, as few researchers use axenic pests in studying pesticide metabolism. Instances of microbiomes evolving pesticide resistance contributing to resistance of their hosts may become more common due the erratic nature of climate change, as microbiome populations typically increase and evolve faster in stressful conditions...
October 26, 2017: Pest Management Science
https://www.readbyqxmd.com/read/29062851/larvicidal-activities-of-indigenous-bacillus-thuringiensis-isolates-and-nematode-symbiotic-bacterial-toxins-against-the-mosquito-vector-culex-pipiens-diptera-culicidae
#10
Ashraf M Ahmed, Hamdy I Hussein, Talat A El-Kersh, Yazeed A Al-Sheikh, Tahany H Ayaad, Hanan A El-Sadawy, Fahd A Al-Mekhlafi, Mohamed S Ibrahim, Jameel Al-Tamimi, Fahd A Nasr
BACKGROUND: The incidence of mosquito-borne diseases and the resistance of mosquitoes to conventional pesticides have recently caused a panic to the authorities in the endemic countries. This study was conducted to identify native larvicidal biopesticides against Culex pipiens for utilization in the battle against mosquito-borne diseases. METHODS: Larvicidal activities of new indigenous Bacillus thuringiensis isolates and crude toxin complexes (TCs) of two nematode bacterial-symbionts, Photorhabdus luminescens akhurstii (HRM1) and Ph...
June 2017: Journal of Arthropod-borne Diseases
https://www.readbyqxmd.com/read/29061523/behavioral-impairments-following-repeated-intranasal-glyphosate-based-herbicide-administration-in-mice
#11
Carlos Javier Baier, Cristina Eugenia Gallegos, Rita Raisman-Vozari, Alejandra Minetti
Inhalation or intranasal (IN) administration of neurotoxicants could constitute a route of toxin delivery to the brain. Pesticides have been proposed as the main environmental factor associated with the etiology of neurodegenerative disorders. In Argentina, the area used for glyphosate (Gly)-resistant crops are sprayed annually with ~200 million liters of Gly-based herbicides (Gly-BHs). Gly residues are often found in the environment, and considering the frequency and amount of its applications, it is probable that the inhalation of Gly-BHs occurs...
October 20, 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/29058103/effects-of-transgenic-expression-of-brevibacterium-linens-methionine-gamma-lyase-mgl-on-accumulation-of-tylenchulus-semipenetrans-and-key-aminoacid-contents-in-carrizo-citrange
#12
Elenor Castillo, Federico Martinelli, Florence Zakharov-Negre, Susan E Ebeler, Tom R Buzo, Michael V McKenry, Abhaya M Dandekar
Carrizo transgenic plants overexpressing methionine-gamma-lyase produced dimethyl sulfide. The transgenic plants displayed more resistance to nematode attacks (Tylenculus semipenetrans) and may represent an innovative strategy for nematode control. Tylenchulus semipenetrans is a nematode pest of many citrus varieties that causes extensive damage to commercial crops worldwide. Carrizo citrange vr. (Citrus sinensis L. Usb × Poncirus trifoliate L. Raf) plants overexpressing Brevibacterium linens methionine-gamma-lyase (BlMGL) produced the sulfur volatile compound dimethyl sulfide (DMS)...
October 20, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/29053858/ectoparasitism-of-commercial-laying-hen-by-megninia-ginglymura-m%C3%A3-gnin-acari-population-dynamic-and-distribution-on-the-body-regions
#13
Tamara B Horn, Matheus S Rocha, Juliana Granich, Júlia H Körbes, Luis F A Alves, Noeli J Ferla
Ectoparasites are temporary or permanent skin dwellers. Megninia ginglymura (Mégnin) (Analgidae) causes economic damage in commercial poultry farms as a result of lower egg production or even death of the host. Little is known about Megninia ginglymura's life cycle and infestation. This study aimed to evaluate the preference of M. ginglymura for different body regions of the host Gallus gallus L. and its abundance and population dynamics in different laying hen houses. Samples were collected from August 2013 to August 2014 in three different commercial laying hen systems: automatic production systems (A1,2,3); semiautomatic systems (S1 (free of pesticides) and S2) and free-range system (FR)...
October 5, 2017: Poultry Science
https://www.readbyqxmd.com/read/29049952/learn-from-microbial-intelligence-for-avermectins-overproduction
#14
REVIEW
Qiang Gao, Gao-Yi Tan, Xuekui Xia, Lixin Zhang
Microbial strains are amazingly clever by homeostasis of their own survival and optimization for the overproduction of a desired phenotype, for example drugable secondary metabolites through coordination of key genes overexpression and media optimizations. Besides their pesticide activities, avermectins (AVMs) are identified as potent antibiotic agents for a wide range of drug-resistant pathogens by a high-throughput synergy screening strategy. To rewire the genetic circuitry controlling low yields, we summarized the work on balancing the biological chassis with functional parts, and optimized their dynamical process, as well as predicted favorable effective overproduction of AVMs by 5Ms strategy...
October 16, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/29039281/inhibitory-effects-of-an-extract-from-non-host-plants-on-physiological-characteristics-of-two-major-cabbage-pests
#15
M Dastranj, E Borzoui, A R Bandani, O L Franco
The diamondback moth (Plutella xylostella) and small white cabbage butterfly (Pieris rapae) are the two main serious pests of cruciferous crops (Brassicaceae) that have developed resistance to chemical control methods. In order to avoid such resistance and also the adverse effects of chemical pesticides on the environment, alternative methods have usually been suggested, including the use of plant enzyme inhibitors. Here, the inhibitory effects of proteinaceous inhibitors extracted from wheat, canola, sesame, bean and triticale were evaluated against the digestive α-amylases, larval growth, development and nutritional indecs of the diamondback moth and small white cabbage butterfly...
October 17, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/29032223/glyphosate-and-roundup-%C3%A2-alter-morphology-and-behavior-in-zebrafish
#16
Daiane Bridi, Stefani Altenhofen, Jonas Brum Gonzalez, Gustavo Kellermann Reolon, Carla Denise Bonan
Glyphosate has become the most widely used herbicide in the world, due to the wide scale adoption of transgenic glyphosate resistant crops after its introduction in 1996. Glyphosate may be used alone, but it is commonly applied as an active ingredient of the herbicide Roundup(®). This pesticide contains several adjuvants, which may promote an unknown toxicity. The indiscriminate application poses numerous problems, both for the health of the applicators and consumers, and for the environment, contaminating the soil, water and leading to the death of plants and animals...
October 12, 2017: Toxicology
https://www.readbyqxmd.com/read/29029851/arresting-evolution
#17
REVIEW
James J Bull, Jeffrey E Barrick
Evolution in the form of selective breeding has long been harnessed as a useful tool by humans. However, rapid evolution can also be a danger to our health and a stumbling block for biotechnology. Unwanted evolution can underlie the emergence of drug and pesticide resistance, cancer, and weeds. It makes live vaccines and engineered cells inherently unreliable and unpredictable, and therefore potentially unsafe. Yet, there are strategies that have been and can possibly be used to stop or slow many types of evolution...
October 10, 2017: Trends in Genetics: TIG
https://www.readbyqxmd.com/read/29027575/transmission-modes-of-a-pesticide-degrading-symbiont-of-the-oriental-fruit-fly-bactrocera-dorsalis-hendel
#18
Zijun Guo, Yongyue Lu, Fan Yang, Ling Zeng, Guangwen Liang, Yijuan Xu
Symbionts are associated with many insects and play several multifunctional roles in insect-microorganism mutualistic relationships. The trichlorphon-degrading symbiont Citrobacter freundii (CF-BD) of the oriental fruit fly Bactrocera dorsalis was recently discovered; however, its intraspecies transmission pathway among flies remains unknown. Here, we use fluorescence in situ hybridization (FISH), PCR detection, and a series of ingenious experiments to reveal that CF-BD was aggregated in rectal pads associated with the female ovipositor, and the CF-BD symbiont was vertically transmitted via egg surface contamination...
October 13, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29026307/porous-se-sio2-nanospheres-treated-paraquat-induced-acute-lung-injury-by-resisting-oxidative-stress
#19
Yong Zhu, Guoying Deng, Anqi Ji, Jiayi Yao, Xiaoxiao Meng, Jinfeng Wang, Qian Wang, Qiugen Wang, Ruilan Wang
Acute paraquat (PQ) poisoning is one of the most common forms of pesticide poisoning. Oxidative stress and inflammation are thought to be important mechanisms in PQ-induced acute lung injury (ALI). Selenium (Se) can scavenge intracellular free radicals directly or indirectly. In this study, we investigated whether porous Se@SiO2 nanospheres could alleviate oxidative stress and inflammation in PQ-induced ALI. Male Sprague Dawley rats and RLE-6TN cells were used in this study. Rats were categorized into 3 groups: control (n=6), PQ (n=18), and PQ + Se@SiO2 (n=18)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29026207/citrus-peel-essential-oil-nanoformulations-to-control-the-tomato-borer-tuta-absoluta-chemical-properties-and-biological-activity
#20
Orlando Campolo, Asma Cherif, Michele Ricupero, Gaetano Siscaro, Kaouthar Grissa-Lebdi, Agatino Russo, Lorena M Cucci, Patrizia Di Pietro, Cristina Satriano, Nicolas Desneux, Antonio Biondi, Lucia Zappalà, Vincenzo Palmeri
The repeated use of conventional synthetic pesticides in crop protection leads to resistance development by pests along with a negative impact on the environment, particularly non-target arthropods. Plant-derived active compounds, such as essential oils (EOs), play a key role in sustainably controlling pests. The lethal and sublethal activity of citrus peel EOs as emulsions and included in polyethylene glycol (PEG) nanoparticles (EO-NPs) was determined against the invasive tomato pest Tuta absoluta. Their effects on the plants were also assessed...
October 12, 2017: Scientific Reports
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