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https://www.readbyqxmd.com/read/27909392/predatory-mites-double-the-economic-injury-level-of-frankliniella-occidentalis-in-strawberry
#1
Clare Sampson, William D J Kirk
The western flower thrips Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) causes bronzing to strawberry fruit. Management of insecticide-resistant strains relies on the integration of predators with carefully timed use of the few insecticides available. Effective management requires better understanding of economic injury levels (EILs) and the factors that affect them. The densities of F. occidentalis and the predatory mite Neoseiulus cucumeris (Oudemans) (Acari: Phytoseiidae) were manipulated in field experiments...
2016: BioControl: Journal of the International Organization for Biological Control
https://www.readbyqxmd.com/read/27907051/battle-in-the-new-world-helicoverpa-armigera-versus-helicoverpa-zea-lepidoptera-noctuidae
#2
José P F Bentivenha, Silvana V Paula-Moraes, Edson L L Baldin, Alexandre Specht, Ivana F da Silva, Thomas E Hunt
The corn earworm Helicoverpa zea (Boddie) and the old world bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) are allopatric species and occur in important agricultural crops. In maize, both species tend to infest the ear. The introduction of H. armigera in Brazil has created a new scenario, where these Helicoverpa species might cohabit and interact with one another, affecting the prevalence of each species in the agroecosystem, integrated pest management, and insect resistance management. In this study, larval occurrence and proportion of these species in maize was assessed in three regions of Brazil during three crop seasons...
2016: PloS One
https://www.readbyqxmd.com/read/27906961/tracking-insecticide-resistance-in-mosquito-vectors-of-arboviruses-the-worldwide-insecticide-resistance-network-win
#3
Vincent Corbel, Nicole L Achee, Fabrice Chandre, Mamadou B Coulibaly, Isabelle Dusfour, Dina M Fonseca, John Grieco, Waraporn Juntarajumnong, Audrey Lenhart, Ademir J Martins, Catherine Moyes, Lee Ching Ng, João Pinto, Kamaraju Raghavendra, Hassan Vatandoost, John Vontas, David Weetman, Florence Fouque, Raman Velayudhan, Jean-Philippe David
No abstract text is available yet for this article.
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27905924/current-knowledge-and-perspectives-of-paenibacillus-a-review
#4
REVIEW
Elliot Nicholas Grady, Jacqueline MacDonald, Linda Liu, Alex Richman, Ze-Chun Yuan
Isolated from a wide range of sources, the genus Paenibacillus comprises bacterial species relevant to humans, animals, plants, and the environment. Many Paenibacillus species can promote crop growth directly via biological nitrogen fixation, phosphate solubilization, production of the phytohormone indole-3-acetic acid (IAA), and release of siderophores that enable iron acquisition. They can also offer protection against insect herbivores and phytopathogens, including bacteria, fungi, nematodes, and viruses...
December 1, 2016: Microbial Cell Factories
https://www.readbyqxmd.com/read/27905919/susceptibility-of-anopheles-gambiae-to-insecticides-used-for-malaria-vector-control-in-rwanda
#5
Emmanuel Hakizimana, Corine Karema, Dunia Munyakanage, Gad Iranzi, John Githure, Jon Eric Tongren, Willem Takken, Agnes Binagwaho, Constantianus J M Koenraadt
BACKGROUND: The widespread emergence of resistance to pyrethroids is a major threat to the gains made in malaria control. To monitor the presence and possible emergence of resistance against a variety of insecticides used for malaria control in Rwanda, nationwide insecticide resistance surveys were conducted in 2011 and 2013. METHODS: Larvae of Anopheles gambiae sensu lato mosquitoes were collected in 12 sentinel sites throughout Rwanda. These were reared to adults and analysed for knock-down and mortality using WHO insecticide test papers with standard diagnostic doses of the recommended insecticides...
December 1, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27896932/mesoionic-insecticides-a-novel-class-of-insecticides-that-modulate-nicotinic-acetylcholine-receptors
#6
Caleb W Holyoke, Daniel Cordova, Wenming Zhang, James D Barry, Robert M Leighty, Robert F Dietrich, James J Rauh, Thomas F Pahutski, George P Lahm, My-Hanh Thi Tong, Eric A Benner, John L Andreassi, Rejane M Smith, Daniel R Vincent, Laurie A Christianson, Luis A Teixeira, Vineet Singh, Kenneth A Hughes
BACKGROUND: As the world population grows toward 9 billion by 2050 it is projected that food production will need to increase by 60%. A critical part of this growth includes the safe and effective use of insecticides to reduce the estimated 20-49% loss of global crop yields due to pests. Development of new insecticides will help sustain this protection and overcome insecticide resistance. RESULTS: A novel class of mesoionic compounds has been discovered with exceptional insecticidal activity on a range of Hemiptera and Lepidoptera...
November 29, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27894851/effectiveness-of-insecticide-treated-bednets-in-malaria-prevention-in-haiti-a-case-control-study
#7
Laura C Steinhardt, Yvan St Jean, Daniel Impoinvil, Kimberly E Mace, Ryan Wiegand, Curtis S Huber, Jean Semé Fils Alexandre, Joseph Frederick, Emery Nkurunziza, Samuel Jean, Brian Wheeler, Ellen Dotson, Laurence Slutsker, S Patrick Kachur, John W Barnwell, Jean Frantz Lemoine, Michelle A Chang
BACKGROUND: Insecticide-treated bednets (ITNs) are effective in preventing malaria where vectors primarily bite indoors and late at night, but their effectiveness is uncertain where vectors bite outdoors and earlier in the evening. We studied the effectiveness of ITNs following a mass distribution in Haiti from May to September, 2012, where the Anopheles albimanus vector bites primarily outdoors and often when people are awake. METHODS: In this case-control study, we enrolled febrile patients presenting to outpatient departments at 17 health facilities throughout Haiti from Sept 4, 2012, to Feb 27, 2014, who were tested with malaria rapid diagnostic tests (RDTs), and administered questionnaires on ITN use and other risk factors...
November 25, 2016: Lancet Global Health
https://www.readbyqxmd.com/read/27894253/latitudinal-clines-in-gene-expression-and-cis-regulatory-element-variation-in-drosophila-melanogaster
#8
Punita Juneja, Andrew Quinn, Francis M Jiggins
BACKGROUND: Organisms can rapidly adapt to their environment when colonizing a new habitat, and this could occur by changing protein sequences or by altering patterns of gene expression. The importance of gene expression in driving local adaptation is increasingly being appreciated, and cis-regulatory elements (CREs), which control and modify the expression of the nearby genes, are predicted to play an important role. Here we investigate genetic variation in gene expression in immune-challenged Drosophila melanogaster from temperate and tropical or sub-tropical populations in Australia and United States...
November 28, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27890609/engineering-dual-begomovirus-bemisia-tabaci-resistance-in-plants
#9
Syed Shan-E-Ali Zaidi, Rob W Briddon, Shahid Mansoor
The whitefly Bemisia tabaci is an important pest of many economically important crops and the vector of begomoviruses (family Geminiviridae). Recently, the expression of insecticidal proteins and/or toxins or double-stranded (ds)RNA homologous to B. tabaci genes has been demonstrated to provide the plant with protection against B. tabaci and the viruses that it transmits.
November 24, 2016: Trends in Plant Science
https://www.readbyqxmd.com/read/27888606/discovery-of-metabolic-resistance-to-neonicotinoids-in-green-peach-aphids-myzus-persicae-in-australia
#10
Siobhan C de Little, Owain Edwards, Anthony R van Rooyen, Andrew Weeks, Paul A Umina
BACKGROUND: Myzus persicae is a serious pest that attacks a broad range of agricultural crops. This species has developed chemical resistance to many insecticides globally and within Australia resistance to multiple chemical groups has been identified. Resistance to neonicotinoid insecticides has been discovered in several countries, but has not previously been confirmed in Australia. We use biomolecular assays and bioassays on field-collected populations to investigate neonicotinoid resistance in M...
November 26, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27886338/frequency-of-the-val1016ile-mutation-on-the-kdr-gene-in-aedes-aegypti-diptera-culicidae-in-south-brazil
#11
M L Collet, C Frizzo, E Orlandin, L D P Rona, J C Nascimento, M A E Montano, G A Müller, G Wagner
Recently, the number of Aedes aegypti foci has increased in west of Santa Catarina, south Brazil, which has increased concern regarding mosquito-borne disease outbreaks such as dengue fever, Zika virus, and chikungunya. Therefore, it is important to monitor genetic resistance to insecticides through "knockdown resistance". Homozygosity (Ile/Ile) at position 1016 in the coding region of a voltage-dependent sodium channel gene (Nav) may induce resistance to pyrethroid insecticides. We evaluated the frequency of these alleles in A...
November 21, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27884199/a-bibliometric-analysis-of-literature-on-malaria-vector-resistance-1996-2015
#12
Waleed M Sweileh, Ansam F Sawalha, Samah W Al-Jabi, Sa'ed H Zyoud, Naser Y Shraim, Adham S Abu-Taha
BACKGROUND: Emergence of insecticide resistance in malaria vectors is a real threat to future goals of elimination and control of malaria. Therefore, the objective of this study was to assess research trend on insecticide resistance of Anopheles mosquito. In specific, number of publications, countries, institutions, and authors' research profile, citation analysis, international collaborations, and impact of journals publishing documents on insecticide resistance will be presented. It was conducted via Scopus search engine which was used to retrieve relevant data...
November 25, 2016: Globalization and Health
https://www.readbyqxmd.com/read/27881743/intralocus-sexual-conflict-and-insecticide-resistance
#13
M F Hawkes, C E Gamble, E C R Turner, M R Carey, N Wedell, D J Hosken
The BA allele of the Drosophila cytochrome P450 gene Cyp6g1 confers resistance to a range of insecticides. It is also subject to intralocus sexual conflict when introgressed into the Canton-S background, whose collection predates the widespread use of insecticides. In this genetic background, the allele confers a pleiotropic fitness benefit to females but a cost to males, and exhibits little sexual dimorphism in conferred insecticide resistance. It is unclear whether these sexually antagonistic effects also exist in current populations that have naturally evolved with insecticides, where genetic modifiers that offset male costs might be expected to evolve...
November 30, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27881148/susceptibility-profile-and-metabolic-mechanisms-involved-in-aedes-aegypti-and-aedes-albopictus-resistant-to-ddt-and-deltamethrin-in-the-central-african-republic
#14
Carine Ngoagouni, Basile Kamgang, Cécile Brengues, Gildas Yahouedo, Christophe Paupy, Emmanuel Nakouné, Mirdad Kazanji, Fabrice Chandre
BACKGROUND: Aedes aegypti and Ae. albopictus are the main epidemic vectors of dengue, chikungunya and Zika viruses worldwide. Their control during epidemics relies mainly on control of larvae and adults with insecticides. Unfortunately, loss of susceptibility of both species to several insecticide classes limits the efficacy of interventions. In Africa, where Aedes-borne viruses are of growing concern, few data are available on resistance to insecticides. To fill this gap, we assessed the susceptibility to insecticides of Ae...
November 24, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27876889/harnessing-hyperthermostable-lactonase-from-sulfolobus-solfataricus-for-biotechnological-applications
#15
Benjamin Rémy, Laure Plener, Laetitia Poirier, Mikael Elias, David Daudé, Eric Chabrière
Extremozymes have gained considerable interest as they could meet industrial requirements. Among these, SsoPox is a hyperthermostable enzyme isolated from the archaeon Sulfolobus solfataricus. This enzyme is a lactonase catalyzing the hydrolysis of acyl-homoserine lactones; these molecules are involved in Gram-negative bacterial communication referred to as quorum sensing. SsoPox exhibits promiscuous phosphotriesterase activity for the degradation of organophosphorous chemicals including insecticides and chemical warfare agents...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27876046/increasing-insecticide-resistance-in-anopheles-funestus-and-anopheles-arabiensis-in-malawi-2011-2015
#16
Themba Mzilahowa, Martin Chiumia, Rex B Mbewe, Veronica T Uzalili, Madalitso Luka-Banda, Anna Kutengule, Don P Mathanga, Doreen Ali, John Chiphwanya, John Zoya, Shadreck Mulenga, Wilfred Dodoli, Jennifer Bergeson-Lockwood, Peter Troell, Jessica Oyugi, Kim Lindblade, John E Gimnig
BACKGROUND: Susceptibility of principal Anopheles malaria vectors to common insecticides was monitored over a 5-year period across Malawi to inform and guide the national malaria control programme. METHODS: Adult blood-fed Anopheles spp. and larvae were collected from multiple sites in sixteen districts across the country between 2011 and 2015. First generation (F1) progeny aged 2-5 days old were tested for susceptibility, using standard WHO procedures, against pyrethroids (permethrin and deltamethrin), carbamates (bendiocarb and propoxur), organophosphates (malathion and pirimiphos-methyl) and an organochlorine (DDT)...
November 22, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27876039/evidence-of-a-multiple-insecticide-resistance-in-the-malaria-vector-anopheles-funestus-in-south-west-nigeria
#17
Rousseau J Djouaka, Seun M Atoyebi, Genevieve M Tchigossou, Jacob M Riveron, Helen Irving, Romaric Akoton, Michael O Kusimo, Adekunle A Bakare, Charles S Wondji
BACKGROUND: Knowing the extent and spread of insecticide resistance in malaria vectors is vital to successfully manage insecticide resistance in Africa. This information in the main malaria vector, Anopheles funestus sensu stricto, is completely lacking in the most populous country in Africa, Nigeria. This study reports the insecticide susceptibility status and the molecular basis of resistance of An. funestus as well as its involvement in malaria transmission in Akaka-Remo, a farm settlement village in southwest Nigeria...
November 22, 2016: Malaria Journal
https://www.readbyqxmd.com/read/27875528/effectiveness-of-seasonal-malaria-chemoprevention-in-children-under-ten-years-of-age-in-senegal-a-stepped-wedge-cluster-randomised-trial
#18
Badara Cissé, El Hadj Ba, Cheikh Sokhna, Jean Louis NDiaye, Jules F Gomis, Yankhoba Dial, Catherine Pitt, Mouhamed NDiaye, Matthew Cairns, Ernest Faye, Magatte NDiaye, Aminata Lo, Roger Tine, Sylvain Faye, Babacar Faye, Ousmane Sy, Lansana Konate, Ekoue Kouevijdin, Clare Flach, Ousmane Faye, Jean-Francois Trape, Colin Sutherland, Fatou Ba Fall, Pape M Thior, Oumar K Faye, Brian Greenwood, Oumar Gaye, Paul Milligan
BACKGROUND: Seasonal Malaria Chemoprevention (SMC) with sulfadoxine-pyrimethamine (SP) plus amodiaquine (AQ), given each month during the transmission season, is recommended for children living in areas of the Sahel where malaria transmission is highly seasonal. The recommendation for SMC is currently limited to children under five years of age, but, in many areas of seasonal transmission, the burden in older children may justify extending this age limit. This study was done to determine the effectiveness of SMC in Senegalese children up to ten years of age...
November 2016: PLoS Medicine
https://www.readbyqxmd.com/read/27870914/transgenic-bt-cotton-does-not-disrupt-the-top-down-forces-regulating-the-cotton-aphid-in-central-china
#19
Yong-Sheng Yao, Peng Han, Chang-Ying Niu, Yong-Cheng Dong, Xi-Wu Gao, Jin-Jie Cui, Nicolas Desneux
Top-down force is referred to arthropod pest management delivered by the organisms from higher trophic levels. In the context of prevalent adoption of transgenic Bt crops that produce insecticidal Cry proteins derived from Bacillus thuringiensis (Bt), it still remains elusive whether the top-down forces are affected by the insect-resistant traits that introduced into the Bt crops. We explored how Bt cotton affect the strength of top-down forces via arthropod natural enemies in regulating a non-target pest species, the cotton aphid Aphis gossypii Glover, using a comparative approach (i...
2016: PloS One
https://www.readbyqxmd.com/read/27869391/-first-report-of-the-f1534c-mutation-associated-with-cross-resistance-to-ddt-and-pyrethroids-in-aedes-aegypti-from-colombia
#20
María Claudia Atencia, María De Jesús Pérez, María Cristina Jaramillo, Sandy Milena Caldera, Suljey Cochero, Eduar Elías Bejarano
The main strategy for the control of Aedes aegypti, vector of dengue, chikungunya and Zika viruses, is based on the use of insecticides to reduce its populations. However, their use has led to insect resistance to these chemicals. Objective: To determine the presence of the F1534C mutation associated with cross-resistance to DDT and pyrethroids in A. aegypti in Sincelejo, Colombia. Materials and methods: We studied nine specimens of A. aegypti that showed resistance to lambdacyhalothrin in bioassays developed by the Secretaría de Salud de Sucre...
September 1, 2016: Biomédica: Revista del Instituto Nacional de Salud
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