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https://www.readbyqxmd.com/read/29773742/wicked-evolution-can-we-address-the-sociobiological-dilemma-of-pesticide-resistance
#1
REVIEW
Fred Gould, Zachary S Brown, Jennifer Kuzma
Resistance to insecticides and herbicides has cost billions of U.S. dollars in the agricultural sector and could result in millions of lives lost to insect-vectored diseases. We mostly continue to use pesticides as if resistance is a temporary issue that will be addressed by commercialization of new pesticides with novel modes of action. However, current evidence suggests that insect and weed evolution may outstrip our ability to replace outmoded chemicals and other control mechanisms. To avoid this outcome, we must address the mix of ecological, genetic, economic, and sociopolitical factors that prevent implementation of sustainable pest management practices...
May 18, 2018: Science
https://www.readbyqxmd.com/read/29772260/oxime-assisted-reactivation-of-tabun-inhibited-acetylcholinesterase-analysed-by-active-site-mutations
#2
Maja Katalinić, Goran Šinko, Nikolina Maček Hrvat, Tamara Zorbaz, Anita Bosak, Zrinka Kovarik
The antidotal property of oximes is attributed to their ability to reactivate acetylcholinesterase (AChE) inhibited by organophosphorus compounds (OP) such as pesticides and nerve warfare agents. Understanding their interactions within the active site of phosphylated AChE is of great significance for the search for more efficient reactivators, especially in the case of the most resistant OP to reactivation, tabun. Therefore, herein we studied the interactions and reactivation of tabun-inhibited AChE by site-directed mutagenesis and a series of bispyridinium oximes...
May 14, 2018: Toxicology
https://www.readbyqxmd.com/read/29769620/carvacrol-and-linalool-co-loaded-in-%C3%AE-cyclodextrin-grafted-chitosan-nanoparticles-as-sustainable-biopesticide-aiming-pest-control
#3
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/29764658/transgenerational-effects-of-insecticides-implications-for-rapid-pest-evolution-in-agroecosystems
#4
REVIEW
Kristian Brevik, Leena Lindström, Stephanie D McKay, Yolanda H Chen
Although pesticides are a major selective force in driving the evolution of insect pests, the evolutionary processes that give rise to insecticide resistance remain poorly understood. Insecticide resistance has been widely observed to increase with frequent and intense insecticide exposure, but can be lost following the relaxation of insecticide use. One possible but rarely explored explanation is that insecticide resistance may be associated with epigenetic modifications, which influence the patterning of gene expression without changing underlying DNA sequence...
April 2018: Current Opinion in Insect Science
https://www.readbyqxmd.com/read/29764657/does-host-plant-adaptation-lead-to-pesticide-resistance-in-generalist-herbivores
#5
REVIEW
Wannes Dermauw, Adam Pym, Chris Bass, Thomas Van Leeuwen, René Feyereisen
Most herbivorous arthropods feed on one or a few closely related plant species; however, certain insect and mite species have a greatly expanded host range. Several of these generalists also show a remarkable propensity to evolve resistance to chemical pesticides. In this review, we ask if the evolution of mechanisms to tolerate the diversity of plant secondary metabolites that generalist herbivores encounter, has pre-adapted them to resist synthetic pesticides. Critical examination of the evidence suggests that a generalist life-style per se is not a predictor of rapid resistance evolution to pesticides...
April 2018: Current Opinion in Insect Science
https://www.readbyqxmd.com/read/29762714/field-populations-of-wild-apis-cerana-honey-bees-exhibit-increased-genetic-diversity-under-pesticide-stress-along-an-agricultural-intensification-gradient-in-eastern-india
#6
Priyadarshini Chakrabarti, Sagartirtha Sarkar, Parthiba Basu
Pesticides have been reported to be one of the major drivers in the global pollinator losses. The large-scale decline in honey bees, an important pollinator group, has resulted in comprehensive studies on honey bee colonies. Lack of information on native wild pollinators has paved the way for this study, which highlights the underlying evolutionary changes occurring in the wild honey bee populations exposed to pesticides along an agricultural intensification landscape. The study reports an increased genetic diversity in native Apis cerana Fabricius (Hymenoptera: Apidae) populations continually exposed to pesticide stress...
May 1, 2018: Journal of Insect Science
https://www.readbyqxmd.com/read/29754487/aqueous-photolysis-of-benzobicyclon-hydrolysate
#7
Katryn L Williams, Richie Kaur, Alexander S McFall, Jacob Kalbfleisch, Joshua Gladfelder, David B Ball, Cort Anastasio, Ronald S Tjeerdema
Benzobicyclon (3-(2-chloro-4-(methylsulfonyl)benzoyl)-2-phenylthiobicyclo[3.2.1]oct-2-en-4-one) is a pro-herbicide used against resistant weeds in California rice fields. Persistence of its active product, benzobicyclon hydrolysate, is of concern. An acidic herbicide, the neutral species photolyzed faster than the more predominant anionic species (t1/2 = 1 h and 320 h, respectively; natural sunlight), from a >10-fold difference in quantum yield. Dissolved organic matter in natural waters reduced direct photolysis and increased indirect photolysis compared to high-purity water...
May 12, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29751696/-research-of-pollution-free-and-precision-cultivation-system-of-chinese-herbal-medicines
#8
Shi-Lin Chen, Lin-Lin Dong, Qiao-Sheng Guo, Jian-He Wei, Xi-Wen Li, Gang Li, Qi Li, Yu-de Liu, Si-Jing Liu, Hong Xu, Yu-Qi Yu, Jie Wu, Chong-Heng Liang
The issues of disordering production and non-standard pesticide application are common in the production of Chinese herbal medicines. Aimed to above problems, research groups built the pollution-free and precision cultivation system of medicinal plants. This system mainly included the precise site selection of medicinal plants based on the GIS technology, modern omics-assisted breeding, metagenomics guiding the soil complex improvement, and the precise field management based on rational application of fertilizer and comprehensive control of disease...
April 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29749092/beyond-insects-current-status-achievements-and-future-perspectives-of-rnai-in-mite-pests
#9
REVIEW
Jinzhi Niu, Guangmao Shen, Olivier Christiaens, Guy Smagghe, Lin He, Jinjun Wang
Mites comprise a group of key agricultural pests on a wide range of crops. They cause harm through feeding on the plant and transferring dangerous pathogens, and the rapid evolution of pesticide resistance in mites highlights the need for novel control methods. Currently, RNA interference (RNAi) shows a great potential for insect pest control. Here, we review the literature associated with RNAi in mite pests. We discuss different target genes and RNAi efficiency in various mite species, a promising Varroa control program through RNAi, the synergy of RNAi with plant defense mechanisms and microorganisms, and the current understandings of systemic movement of dsRNA...
May 11, 2018: Pest Management Science
https://www.readbyqxmd.com/read/29747673/ethnobotanical-survey-of-plants-used-as-repellents-against-housefly-musca-domestica-l-diptera-muscidae-in-budondo-subcounty-jinja-district-uganda
#10
Kalori Baana, Harriet Angwech, Geoffrey Maxwell Malinga
BACKGROUND: The housefly, Musca domestica L., is a major public health and domestic pest that spoils food and causes irritation and is a vector of many infectious disease pathogens of medical and veterinary importance. Currently, its control relies largely on chemical pesticides. However, the adverse health and environmental effects of pesticides, risk of development of insect resistance, and bioaccumulation through the food chain emphasize the need to search for environmentally friendly alternatives...
May 10, 2018: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/29739645/plant-growth-promoting-rhizobacteria-reduce-aphid-population-and-enhance-the-productivity-of-bread-wheat
#11
Muhammad Naeem, Zubair Aslam, Abdul Khaliq, Jam Nazir Ahmed, Ahmad Nawaz, Mubshar Hussain
Plant growth promoting rhizobacteria increase plant growth and give protection against insect pests and pathogens. Due to the negative impact of chemical pesticides on environment, alternatives to these chemicals are needed. In this scenario, the biological methods of pest control offer an eco-friendly and an attractive option. In this study, the effect of two plant growth promoting rhizobacterial strains (Bacillus sp. strain 6 and Pseudomonas sp. strain 6K) on aphid population and wheat productivity was evaluated in an aphid susceptible (Pasban-90) and resistant (Inqlab-91) wheat cultivar...
April 24, 2018: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/29735983/resistance-of-rice-to-insect-pests-mediated-by-suppression-of-serotonin-biosynthesis
#12
Hai-Ping Lu, Ting Luo, Hao-Wei Fu, Long Wang, Yuan-Yuan Tan, Jian-Zhong Huang, Qing Wang, Gong-Yin Ye, Angharad M R Gatehouse, Yong-Gen Lou, Qing-Yao Shu
Rice is one of the world's most important foods, but its production suffers from insect pests, causing losses of billions of dollars, and extensive use of environmentally damaging pesticides for their control1,2 . However, the molecular mechanisms of insect resistance remain elusive. Although a few resistance genes for planthopper have been cloned, no rice germplasm is resistant to stem borers. Here, we report that biosynthesis of serotonin, a neurotransmitter in mammals 3 , is induced by insect infestation in rice, and its suppression confers resistance to planthoppers and stem borers, the two most destructive pests of rice 2 ...
May 7, 2018: Nature Plants
https://www.readbyqxmd.com/read/29734625/organic-contaminants-in-african-aquatic-systems-current-knowledge-health-risks-and-future-research-directions
#13
REVIEW
Willis Gwenzi, Nhamo Chaukura
Organic contaminants (OCs) are increasingly being reported in African aquatic systems, yet a critical evaluation of the literature is still lacking. The objectives of this review were to: (1) identify hotspot reservoirs, transfer pathways and ecological and human risks of OCs, (2) identify potential interventions to minimize the health risks, and (3) highlight knowledge gaps and research constraints. OCs widely reported in aquatic systems include pesticides, pharmaceuticals, plasticizers, solvents, endocrine disrupting compounds, and antimicrobial resistance genes, originating from applications in crop protection, veterinary and animal husbandry, human sanitation and hygiene, human vector and disease control...
April 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29718272/handling-artificially-terminated-events-in-electropenetrography-data
#14
Timothy A Ebert, Elaine A Backus, Michael E Rogers
Electropenetrography a.k.a. electrical penetration graph or EPG is a rigorous technique for studying arthropod behavior. Essentially, the arthropod and host are part of an electrical circuit that generates patterns of voltage (waveforms), whose biological meanings are defined by correlation with histology and behavior. EPG is used for studying stylet probing behavior of hemipterans, and blood-feeding arthropods. These results are applied to understanding pesticide action, host plant resistance, and vector-pathogen-host interactions...
April 28, 2018: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29713567/palmitic-acid-induces-neurotoxicity-and-gliatoxicity-in-sh-sy5y-human-neuroblastoma-and-t98g-human-glioblastoma-cells
#15
Yee-Wen Ng, Yee-How Say
Background: Obesity-related central nervous system (CNS) pathologies like neuroinflammation and reactive gliosis are associated with high-fat diet (HFD) related elevation of saturated fatty acids like palmitic acid (PA) in neurons and astrocytes of the brain. Methods: Human neuroblastoma cells SH-SY5Y (as a neuronal model) and human glioblastoma cells T98G (as an astrocytic model), were treated with 100-500 µM PA, oleic acid (OA) or lauric acid (LA) for 24 h or 48 h, and their cell viability was assessed by 3-(4,5-dimetylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay...
2018: PeerJ
https://www.readbyqxmd.com/read/29710604/inputs-source-apportionment-and-transboundary-transport-of-pesticides-and-other-polar-organic-contaminants-along-the-lower-red-river-manitoba-canada
#16
Jonathan K Challis, Leah D Cuscito, Shira Joudan, Kim H Luong, Charles W Knapp, Mark L Hanson, Charles S Wong
The Red River originates in the U.S., drains into Lake Winnipeg, and is a significant pathway for nutrients. We investigate its role as a source for pesticides, pharmaceuticals, per- and polyfluoroalkyl substances (PFASs), and microbes bearing antibiotic resistance genes (ARGs). We delineate agricultural, urban, and rural land-use for organic contaminants to determine the extent of chemical transboundary riverine fluxes, and characterize levels and trends of organic contaminants and ARGs between spring and fall 2014 and 2015...
April 20, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29699815/associations-between-persistent-organic-pollutants-and-metabolic-syndrome-in-morbidly-obese-individuals
#17
S Dusanov, J Ruzzin, H Kiviranta, T O Klemsdal, L Retterstøl, P Rantakokko, R Airaksinen, S Djurovic, S Tonstad
BACKGROUND AND AIMS: Persons with "metabolically healthy" obesity may develop cardiometabolic complications at a lower rate than equally obese persons with evident metabolic syndrome. Even morbidly obese individuals vary in risk profile. Persistent organic pollutants (POPs) are widespread environmental chemicals that impair metabolic homeostasis. We explored whether prevalence of metabolic syndrome in morbidly obese individuals is associated with serum concentrations of POPs...
March 13, 2018: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/29698535/biological-control-of-potato-common-scab-by-bacillus-amyloliquefaciens-ba01
#18
Chih Lin, Chia-Hsin Tsai, Pi-Yu Chen, Chia-Yen Wu, Ya-Lin Chang, Yu-Liang Yang, Ying-Lien Chen
Potato common scab, which is caused by soil-borne Streptomyces species, is a severe plant disease that results in a significant reduction in the economic value of potatoes worldwide. Due to the lack of efficacious pesticides, crop rotations, and resistant potato cultivars against the disease, we investigated whether biological control can serve as an alternative approach. In this study, multiple Bacillus species were isolated from healthy potato tubers, and Bacillus amyloliquefaciens Ba01 was chosen for further analyses based on its potency against the potato common scab pathogen Streptomyces scabies...
2018: PloS One
https://www.readbyqxmd.com/read/29687602/elucidating-the-mechanism-of-action-of-copper-heptagluconate-on-the-plant-immune-system-against-pseudomonas-syringae-in-tomato-solanum-lycopersicum-l
#19
Ana I González-Hernández, Eugenio Llorens, Carlos Agustí-Brisach, Begonya Vicedo, Teresa Yuste, Antonio Cerveró, Carlos Ledó, Pilar García-Agustín, Leonor Lapeña
BACKGROUND: Phytopathogenic problems caused by the bacterial pathogen Pseudomonas syringae in tomato have been becoming more serious by the emergence of resistant strains to classical pesticides. This situation has propelled the research for new formulations with lower environmental problems. One of the most promising alternatives to the use of classical pesticides is the induction of natural plant defences. New formulations based on Cu complexed with heptagluconic acid are able to induce plant innate defences which could be an alternative to the classical treatments based on inorganic Cu against bacterial speck...
April 24, 2018: Pest Management Science
https://www.readbyqxmd.com/read/29686508/first-report-of-detection-of-the-putative-receptor-of-bacillus-thuringiensis-toxin-vip3aa-from-black-cutworm-agrotis-ipsilon
#20
Gamal H Osman, Waleed J Altaf, Ibrahim A S Saleh, Raya Soltane, Hussein H Abulreesh, Ibrahim A Arif, Ahmed M Ramadan, Yehia A Osman
Black cutworm (BCW) Agrotis ipsilon , an economically important lepidopteran insect, has attracted a great attention. Bacillus thuringiensis (Bt) is spore forming soil bacteria and is an excellent environment-friendly approach for the control of phytophagous and disease-transmitting insects. In fact, bio-pesticide formulations and insect resistant transgenic plants based on the bacterium Bt delta-endotoxin have attracted worldwide attention as a safer alternative to harmful chemical pesticides. The major objective of the current study was to understand the mechanism of interaction of Bt toxin with its receptor molecule(s)...
March 2018: Saudi Journal of Biological Sciences
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