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pesticide resistance

Thomas P Karbanowicz, Amanda Nouwens, Ala E Tabor, Manuel Rodriguez-Valle
Tick populations are controlled through the application of chemical pesticides. However, the rise in chemical resistance has prompted the investigation of other control methods such as the use of tick vaccines. Proteomic analysis provides valuable information about the possible function and localization of proteins, as candidate vaccine proteins are often either secreted or localized on the cell-surface membrane. Progress in the utilization of proteomics for the identification of novel treatment targets has been significant...
March 14, 2018: Veterinary Sciences
Mohamed Youness, Martine Sancelme, Bruno Combourieu, Pascale Besse-Hoggan
The use of triazole fungicides in various fields ranging from agriculture to therapy, can cause long-term undesirable effects on different organisms from various environmental compartments and lead to resistance phenomena (even in humans) due to their extensive use and persistence. Their occurrence in various water bodies has increased and tebuconazole, in particular, is often detected, sometimes in high concentration. Only a few bacterial and fungal strains have been isolated and found to biotransform this fungicide, described as not easily biodegradable...
February 24, 2018: Journal of Hazardous Materials
Dal-Hoe Koo, William T Molin, Christopher A Saski, Jiming Jiang, Karthik Putta, Mithila Jugulam, Bernd Friebe, Bikram S Gill
Gene amplification has been observed in many bacteria and eukaryotes as a response to various selective pressures, such as antibiotics, cytotoxic drugs, pesticides, herbicides, and other stressful environmental conditions. An increase in gene copy number is often found as extrachromosomal elements that usually contain autonomously replicating extrachromosomal circular DNA molecules (eccDNAs). Amaranthus palmeri , a crop weed, can develop herbicide resistance to glyphosate [ N -(phosphonomethyl) glycine] by amplification of the 5-enolpyruvylshikimate-3-phosphate synthase ( EPSPS ) gene, the molecular target of glyphosate...
March 12, 2018: Proceedings of the National Academy of Sciences of the United States of America
Chao Qin, Cheng-Hua Wang, Ying-Ying Wang, Shi-Qing Sun, Huan-Huan Wang, Chao-Bin Xue
Diamondback moth, Plutella xylostella (L.; Lepidoptera: Plutellidae), is an important pest of crucifers worldwide. The extensive use of diamide insecticides has led to P. xylostella resistance and this presents a serious threat to vegetable production. We selected chlorantraniliprole (Rf) and flubendiamide (Rh) resistance strains of P. xylostella with resistance ratios of 684.54-fold and 677.25-fold, respectively. The Rf and Rh strains underwent 46 and 36 generations of lab-selection for resistance, respectively...
February 24, 2018: Journal of Economic Entomology
Marianne Smith Edge, Mary Elizabeth Kunkel, Jennifer Schmidt, Constantina Papoutsakis
In the late 20th century, plant breeders began using molecular biology techniques such as recombinant DNA, also known as genetic engineering, along with traditional cross-breeding. Ten plant and one animal food have been approved for commercialization in the United States. Today, foods and ingredients from genetically engineered (GE) crops are present throughout the food supply, which has led to varying levels of acceptance. Much discussion exists among consumers and health professionals about the believability of statements made regarding benefits or risks of GE foods...
March 8, 2018: Journal of the Academy of Nutrition and Dietetics
Ana Laura Calderón-Garcidueñas, Stefan M Waliszewski, Rubén Ruiz-Ramos, María Del Carmen Martinez-Valenzuela
The population that lives in areas where organochlorine pesticides were spread in the past is still exposed to them through contaminated food, particulate matter, and vapors. Due to their lipophilic properties and resistance to metabolic reactions, they accumulate in tissues and fluids rich in lipids. The aim of the study was to monitor the concentrations of organochlorine pesticides in forensic adipose tissue samples of adult inhabitants of Veracruz City, Mexico, and compare their time trend levels from 1988 to 2014...
March 10, 2018: Environmental Monitoring and Assessment
Pedro Talhinhas, Andreia Loureiro, Helena Oliveira
Olive anthracnose causes fruit rot leading to its drop or mummification, resulting in yield losses and in the degradation of oil quality. Taxonomy and distribution: The disease is caused by diverse species of Colletotrichum, mostly clustering in the C. acutatum species complex. Colletotrichum nymphaeae and C. godetiae are the prevalent species in the Northern Hemisphere, while C. acutatum sensu stricto is the most frequent species in the Southern Hemisphere, although it is recently and quickly emerging in the Northern Hemisphere...
March 8, 2018: Molecular Plant Pathology
John A Hondred, Joyce Breger, Nathan Alves, Scott A Trammell, Scott A Walper, Igor L Medintz, Jonathan C Claussen
Solution phase printing of graphene-based electrodes has recently become an attractive low-cost, scalable manufacturing technique to create in-field electrochemical biosensors. Here we report a graphene-based electrode developed via Inkjet Maskless Lithography (IML) for the direct and rapid monitoring of triple-O linked phosphonate organophosphates (OPs); these constitute the active compounds found in chemical warfare agents and pesticides that exhibit acute toxicity as well as long-term pollution to soils and waterways...
March 5, 2018: ACS Applied Materials & Interfaces
Sébastien Boyer, Sergio Lopes, Didot Prasetyo, John Hustedt, Ay Sao Sarady, Dyna Doum, Sony Yean, Borin Peng, Sam Bunleng, Rithea Leang, Didier Fontenille, Jeffrey Hii
Dengue fever is a major public health concern, including 185,000 annual cases in Cambodia. Aedes aegypti is the primary vector for dengue transmission and is targeted with insecticide treatments. This study characterized the insecticide resistance status of Ae aegypti from rural and urban locations. The susceptibility to temephos, permethrin, and deltamethrin of Ae aegypti was evaluated in accordance with World Health Organization instructions. All the field populations showed lower mortality rate to temephos compared with the sensitive strain with resistance ratio 50 (RR50 ) varying from 3...
February 1, 2018: Asia-Pacific Journal of Public Health
Juan C Sanchez-Hernandez, Juan Manuel Ríos, Andrés M Attademo
Assessment of organophosphorus (OP) pesticide exposure in non-target organisms rarely involves non-neural molecular targets. Here we performed a 30-d microcosm experiment with Lumbricus terrestris to determine whether the activity of digestive enzymes (phosphatase, β-glucosidase, carboxylesterase and lipase) was sensitive to chlorpyrifos (5 mg kg-1 wet soil). Likewise, acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) activities were measured in the wall muscle and gastrointestinal tissues as indicators of OP exposure...
March 1, 2018: Ecotoxicology
A Vaezi, H Fakhim, J Javidnia, S Khodavaisy, Z Abtahian, M Vojoodi, F Nourbakhsh, H Badali
Tricyclazole as a common fungicide wildly used to control rice blast disease in the Asian country may induce azole resistance in Aspergillus fumigatus isolates. The main reason of the acquired azole resistance is probably environmental exposure through wide fungicide use in agriculture. The present study was conducted with the aim of investigating the current status of the azole-resistant A. fumigatus obtained from the paddy fields with exposure to tricyclazole. A total of 108 soil samples were collected from four different locations of paddy fields in Mazandaran Province, Iran...
February 26, 2018: Journal de Mycologie Médicale
Seethalakshmi Sakthivel, S K M Habeeb, Chandrasekar Raman
Cotton is an economically important crop and its production is challenged by the diversity of pests and related insecticide resistance. Identification of the conserved target across the cotton pest will help to design broad spectrum insecticide. In this study, we have identified conserved sequences by Expressed Sequence Tag (EST) profiling from three cotton pests namely Aphis gossypii, Helicoverpa armigera and Spodoptera exigua. One target protein Arginine Kinase having a key role in insect physiology and energy metabolism was studied further using homology modeling, virtual screening, molecular docking and molecular dynamics simulation to identify potential biopesticide compounds from the Zinc natural database...
March 1, 2018: Journal of Biomolecular Structure & Dynamics
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
Kristian Brevik, Sean D Schoville, David Mota-Sanchez, Yolanda H Chen
BACKGROUND: Arthropod pests are widely perceived to evolve resistance to insecticides at different rates. Although widespread "successful" species are assumed to evolve quickly and minor pests slowly, few studies have utilized published data on resistance events to test for differences among species. Using 532 records from the Arthropod Pesticide Resistance Database covering 20 species, we applied a survival analysis to model the number of generations from insecticide introduction to the first report of arthropod resistance, providing one of the most comprehensive analyses of this question to date...
March 1, 2018: Pest Management Science
Merel Steenbergen, Ahmed Abd-El-Haliem, Petra Bleeker, Marcel Dicke, Rocio Escobar-Bravo, Gang Cheng, Michel A Haring, Merijn R Kant, Iris Kappers, Peter G L Klinkhamer, Kirsten A Leiss, Saioa Legarrea, Mirka Macel, Sanae Mouden, Corné M J Pieterse, Sandeep J Sarde, Robert C Schuurink, Martin De Vos, Saskia C M Van Wees, Colette Broekgaarden
Plants have developed diverse defence mechanisms to ward off herbivorous pests. However, agriculture still faces estimated crop yield losses ranging from 25 to 40 percent annually. Not only because of direct feeding damage, but also because many pests serve as vectors of plant viruses. Herbivorous thrips (Thysanoptera) are important pests in vegetable and ornamental crops worldwide, encompassing virtually all general problems of pests: they are highly polyphagous, hard to control because of their complex life style, and they are vectors of destructive viruses...
February 27, 2018: Journal of Experimental Botany
Justyna Maliszewska, Bartosz Piechowicz, Gabriela Maciąga, Lech Zaręba, Sonia Marcinkowska
Many factors may affect pesticide effectiveness against pests. One of the factors that should be considered is circadian rhythmicity. In this study, we evaluated daily variations in pyrethroid susceptibility in the house cricket, Acheta domesticus L. Crickets were exposed to a standard dose of ß-cyfluthrin at different times of a day, and pesticide residue levels were evaluated using gas chromatography. Results demonstrate that the time of pyrethroid disappearance is correlated with the circadian clock, with the highest decomposition rate at night...
February 27, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
Veronika Zengerer, Michael Schmid, Marco Bieri, Denise C Müller, Mitja N P Remus-Emsermann, Christian H Ahrens, Cosima Pelludat
In light of public concerns over the use of pesticides and antibiotics in plant protection and the subsequent selection for spread of resistant bacteria in the environment, it is inevitable to broaden our knowledge about viable alternatives, such as natural antagonists and their mode of action. The genus Pseudomonas is known for its metabolic versatility and genetic plasticity, encompassing pathogens as well as antagonists. We characterized strain Pseudomonas orientalis F9, an isolate from apple flowers in a Swiss orchard, and determined its antagonistic activity against several phytopathogenic bacteria, in particular Erwinia amylovora , the causal agent of fire blight...
2018: Frontiers in Microbiology
Lorenzo Furlan, Alberto Pozzebon, Carlo Duso, Noa Simon-Delso, Francisco Sánchez-Bayo, Patrice A Marchand, Filippo Codato, Maarten Bijleveld van Lexmond, Jean-Marc Bonmatin
Over-reliance on pesticides for pest control is inflicting serious damage to the environmental services that underpin agricultural productivity. The widespread use of systemic insecticides, neonicotinoids, and the phenylpyrazole fipronil in particular is assessed here in terms of their actual use in pest management, effects on crop yields, and the development of pest resistance to these compounds in many crops after two decades of usage. Resistance can only be overcome in the longterm by implementing methods that are not exclusively based on synthetic pesticides...
February 25, 2018: Environmental Science and Pollution Research International
Blas Agut, Victoria Pastor, Josep A Jaques, Victor Flors
Tetranychus urticae ( T. urticae ) Koch is a cosmopolitan, polyphagous mite which causes economic losses in both agricultural and ornamental plants. Some traits of T. urticae hamper its management, including a short life cycle, arrhenotokous parthenogenesis, its haplodiploid sex determination system, and its extraordinary ability to adapt to different hosts and environmental conditions. Currently, the use of chemical and biological control are the major control methods used against this mite. In recent years, some studies have focused on plant defence mechanisms against herbivores...
February 21, 2018: International Journal of Molecular Sciences
Akhilesh Kumar, Jay Prakash Verma
The biotic and abiotic stresses are major constraints for crop yield, food quality and global food security. A number of parameters such as physiological, biochemical, molecular of plants are affected under stress condition. Since the use of inorganic fertilizers and pesticides in agriculture practices cause degradation of soil fertility and environmental pollutions. Hence it is necessary to develop safer and sustainable means for agriculture production. The application of plant growth promoting microbes (PGPM) and mycorrhizal fungi enhance plant growth, under such conditions...
March 2018: Microbiological Research
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