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https://www.readbyqxmd.com/read/28345667/the-toxicity-of-angiotensin-converting-enzyme-inhibitors-to-larvae-of-the-disease-vectors-aedes-aegypti-and-anopheles-gambiae
#1
Zatul-'Iffah Abu Hasan, Helen Williams, Nur M Ismail, Hidayatulfathi Othman, Gyles E Cozier, K Ravi Acharya, R Elwyn Isaac
The control of mosquitoes is threatened by the appearance of insecticide resistance and therefore new control chemicals are urgently required. Here we show that inhibitors of mosquito peptidyl dipeptidase, a peptidase related to mammalian angiotensin-converting enzyme (ACE), are insecticidal to larvae of the mosquitoes, Aedes aegypti and Anopheles gambiae. ACE inhibitors (captopril, fosinopril and fosinoprilat) and two peptides (trypsin-modulating oostatic factor/TMOF and a bradykinin-potentiating peptide, BPP-12b) were all inhibitors of the larval ACE activity of both mosquitoes...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345196/flupyradifurone-effectively-manages-whitefly-bemisia-tabaci-med-hemiptera-aleyrodidae-and-tomato-yellow-leaf-curl-virus-tylcv-in-tomato
#2
Emmanouil Roditakis, Marianna Stavrakaki, Maria Grispou, Aikaterini Achimastou, Χavier Van Waetermeulen, Ralf Nauen, Anastasia Tsagkarakou
BACKGROUND: The cotton whitefly Bemisia tabaci (Gennadius) is among the most important pests of numerous crops and a vector of >100 plant viruses, causing significant crop losses worldwide. Managing the pest as well as inhibiting the transmission of major viruses such as Tomato yellow leaf curl virus (TYLCV) is of utmost importance for sustainable yields. The efficacy on both whiteflies and virus transmission of the novel systemic butenolide insecticide flupyradifurone, was investigated in this study...
March 27, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28343720/hydroxy-fipronil-is-a-new-urinary-biomarker-of-exposure-to-fipronil
#3
Natalia Vasylieva, Bogdan Barnych, Debin Wan, El-Sayed A El-Sheikh, Hai M Nguyen, Heike Wulff, Rebecca McMahen, Mark Strynar, Shirley J Gee, Bruce D Hammock
Occupational medical surveillance is highly desirable in manufacturing facilities where exposure to chemicals is significant. The insecticide fipronil is generally considered safe for humans but with increasing use, exposure to fipronil is of concern. Identification of urinary metabolites of fipronil may allow development of affordable, cheap and rapid procedures for human exposure evaluation. In this study we developed a fast and easy approach for synthesis of hydroxy-fipronil, a potential urinary metabolite of fipronil...
March 23, 2017: Environment International
https://www.readbyqxmd.com/read/28342998/field-evaluation-of-cucurbit-yellow-stunting-disorder-virus-transmission-by-bemisia-tabaci
#4
S J Castle, J P Palumbo, P Merten
Cucurbit yellow stunting disorder virus (CYSDV) is a whitefly-transmitted Crinivirus (Closteroviridae) that impacts melon production in many parts of the world including the USA. It has been responsible for melon crop loss in the southwestern U.S. since 2006 when it was first identified. Control strategies have revolved mainly around chemical control, but research to identify suitable products and approaches to implementing them has lagged. The current study investigated the performance of four systemic insecticides in the field while concurrently tracking CYSDV disease progression after controlled and natural whitefly inoculation of young melon plants...
March 22, 2017: Virus Research
https://www.readbyqxmd.com/read/28342852/effects-of-sub-culturing-on-genetic-and-physiological-parameters-in-different-beauveria-bassiana-isolates
#5
Naser Eivazian Kary, Zhila Alizadeh
Beauveria bassiana is a fungus which is widely used as a biological insecticide to control a number of economically important insect pests. Knowledge of the genetic diversity of the isolates, understanding the underlying nature of these evolutionary phenomena and finding appropriate and simple screening tools play an important role in developing effective biocontrol agents. Here, we monitored changes of electrophoretic karyotype of small molecules of extrachromosomal DNAs, presumably mitochondrial DNA or plasmids in several individual isolates of B...
March 22, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28341807/the-human-cancer-cell-active-toxin-cry41aa-from-bacillus-thuringiensis-acts-like-its-insecticidal-counterparts
#6
Vidisha Krishnan, Barbara Domanska, Alicia Elhigazi, Fatai Afolabi, Michelle J West, Neil Crickmore
Understanding how certain protein toxins from the normally insecticidal bacterium Bacillus thuringiensis target human cell lines has implications for both the risk assessment of products containing these toxins and potentially for cancer therapy. This understanding requires knowledge of whether the human cell active toxins work by the same mechanism as their insecticidal counterparts or by alternative ones. The B. thuringiensis Cry41Aa (also known as Parasporin3) toxin is structurally related to the toxins synthesized by commercially produced transgenic insect-resistant plants, with the notable exception of an additional C-terminal beta-trefoil ricin domain...
March 24, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28340765/detection-of-trace-levels-of-organophosphate-pesticides-using-an-electronic-tongue-based-on-graphene-hybrid-nanocomposites
#7
Murilo H M Facure, Luiza A Mercante, Luiz H C Mattoso, Daniel S Correa
Organophosphate (OP) compounds impose significant strains on public health, environmental/food safety and homeland security, once they have been widely used as pesticides and insecticides and also display potential to be employed as chemical warfare agents by terrorists. In this context, the development of sensitive and reliable chemical sensors that would allow in-situ measurements of such contaminants is highly pursued. Here we report on a free-enzyme impedimetric electronic tongue (e-tongue) used in the analysis of organophosphate pesticides comprising four sensing units based on graphene hybrid nanocomposites...
May 15, 2017: Talanta
https://www.readbyqxmd.com/read/28340571/dirprot-a-computational-approach-for-discriminating-insecticide-resistant-proteins-from-non-resistant-proteins
#8
Prabina Kumar Meher, Tanmaya Kumar Sahu, Anjali Banchariya, Atmakuri Ramakrishna Rao
BACKGROUND: Insecticide resistance is a major challenge for the control program of insect pests in the fields of crop protection, human and animal health etc. Resistance to different insecticides is conferred by the proteins encoded from certain class of genes of the insects. To distinguish the insecticide resistant proteins from non-resistant proteins, no computational tool is available till date. Thus, development of such a computational tool will be helpful in predicting the insecticide resistant proteins, which can be targeted for developing appropriate insecticides...
March 24, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28340457/dermal-exposure-of-applicators-to-chlorpyrifos-on-rice-farms-in-ghana
#9
Albert Atabila, Dung Tri Phung, Jonathan N Hogarh, Paul Osei-Fosu, Ross Sadler, Des Connell, Cordia Chu
Studies evaluating dermal exposure to pesticides among applicators in tropical countries have largely been conducted using the patch dosimetry and hand wiping/washing techniques. This study used the more accurate whole-body dosimetry technique to evaluate dermal exposure to chlorpyrifos among applicators on rice farms in Ghana. The exposure levels were plotted as Cumulative Probability Distribution (CPD). Total Dermal Exposure (TDE) of chlorpyrifos among the median exposed and the 5% highly exposed groups during a spray event were 24 mg and 48 mg, respectively...
March 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28339074/absence-of-t-14-18-chromosome-translocation-in-agricultural-workers-after-short-term-exposure-to-pesticides
#10
Venerando Rapisarda, Caterina Ledda, Serena Matera, Lucrezia Fago, Giorgio Arrabito, Luca Falzone, Andrea Marconi, Massimo Libra, Carla Loreto
Exposure to pesticides represents a potential health risk for the general population and for agricultural workers in particular. Some researchers observed that occupational exposure to pesticides is associated with risk of non‑Hodgkin's lymphoma (NHL). The chromosomal translocation t(14;18)(q32;q21) is one of the most common chromosomal abnormalities in NHL. The aim of this study was to detect the effects of pesticides on t(14;18) chromosome translocation in agricultural workers after short-term exposure...
March 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28337632/comparative-toxicity-of-imidacloprid-and-thiacloprid-to-different-species-of-soil-invertebrates
#11
Cláudia de Lima E Silva, Nicola Brennan, Jitske M Brouwer, Daniël Commandeur, Rudo A Verweij, Cornelis A M van Gestel
Neonicotinoid insecticides have come under increasing scrutiny for their impact on non-target organisms, especially pollinators. The current scientific literature is mainly focused on the impact of these insecticides on pollinators and some aquatic insects, leaving a knowledge gap concerning soil invertebrates. This study aimed at filling this gap, by determining the toxicity of imidacloprid and thiacloprid to five species of soil invertebrates: earthworms (Eisenia andrei), enchytraeids (Enchytraeus crypticus), Collembola (Folsomia candida), oribatid mites (Oppia nitens) and isopods (Porcellio scaber)...
March 23, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28336268/malaria-incidence-during-early-childhood-in-rural-burkina-faso-analysis-of-a-birth-cohort-protected-with-insecticide-treated-mosquito-nets
#12
Sabrina Wehner, Gabriele Stieglbauer, Corneille Traoré, Ali Sie, Heiko Becher, Olaf Müller
BACKGROUND: Even in the high transmission areas of sub-Saharan Africa (SSA), the incidence of falciparum malaria varies greatly depending on factors such as age, rainfall pattern, distance to breeding places, quality of houses, and existing vector control measures. Insecticide-treated mosquito nets (ITN) have now become the vector control standard in nearly all of SSA. This study aims to describe and analyse the incidence of malaria in a cohort of young children protected with ITN in rural West Africa...
March 20, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28336095/chlorinated-pesticides-and-natural-brominated-anisoles-in-air-at-three-northern-baltic-stations
#13
Terry F Bidleman, Hjalmar Laudon, Olle Nygren, Staffan Svanberg, Mats Tysklind
Polyurethane foam (PUF) disk passive samplers were deployed at one inland and two island locations in the Bothnian Bay region of the northern Baltic Sea. Uptake was linear over 81-147 d and a temperature range of -2.6 to 14.2 °C for organochlorine pesticides (OCPs) and current-use pesticides (CUPs) having log KOA ≥9 at ambient temperatures. Partial saturation of the PUF disks occurred for the more volatile OCPs hexachlorocyclohexanes (HCHs) and hexachlorobenzene (HCB), and for bromoanisoles (BAs), which are products of bromophenols released by natural and anthropogenic sources...
March 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28335456/mosquito-traps-an-innovative-environmentally-friendly-technique-to-control-mosquitoes
#14
Brigitte Poulin, Gaëtan Lefebvre, Camille Muranyi-Kovacs, Samuel Hilaire
We tested the use of mosquito traps as an alternative to spraying insecticide in Camargue (France) following the significant impacts observed on the non-target fauna through Bti persistence and trophic perturbations. In a village of 600 inhabitants, 16 Techno Bam traps emitting CO₂ and using octenol lures were set from April to November 2016. Trap performance was estimated at 70% overall based on mosquitoes landing on human bait in areas with and without traps. The reduction of Ochlerotatus caspius and Oc...
March 18, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28334799/the-relative-roles-of-anc-and-epi-in-the-continuous-distribution-of-llins-a-qualitative-study-in-four-countries
#15
Katherine Theiss-Nyland, Diakalia Koné, Corine Karema, Waqo Ejersa, Jayne Webster, Jo Lines
Background: The continuous distribution of long-lasting insecticidal nets (LLINs) for malaria prevention, through the antenatal care (ANC) and the Expanded Programme on Immunizations (EPI), is recommended by the WHO to improve and maintain LLIN coverage. Despite these recommendations, little is known about the relative strengths and weaknesses of the ANC and EPI-based LLIN distribution. This study aimed to explore and compare the roles of the ANC and EPI for LLIN distribution in four African countries...
December 26, 2016: Health Policy and Planning
https://www.readbyqxmd.com/read/28334388/bacterial-endosymbionts-of-the-psyllid-cacopsylla-pyricola-hemiptera-psyllidae-in-the-pacific-northwestern-united-states
#16
W Rodney Cooper, Stephen F Garczynski, David R Horton, Thomas R Unruh, Elizabeth H Beers, W Shearer Peter, Richard J Hilton
Insects often have facultative associations with bacterial endosymbionts, which can alter the insects' susceptibility to parasitism, pathogens, plant defenses, and certain classes of insecticides. We collected pear psylla, Cacopsylla pyricola (Förster) (Hemiptera: Psyllidae), from pear orchards in Washington and Oregon, and surveyed them for the presence of bacterial endosymbionts. Adult psyllids were collected on multiple dates to allow us to assay specimens of both the summer ("summerform") and the overwintering ("winterform") morphotypes...
March 3, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28334362/development-of-an-attract-and-kill-strategy-for-drosophila-suzukii-diptera-drosophilidae-evaluation-of-attracticidal-spheres-under-laboratory-and-field-conditions
#17
Kevin B Rice, Brent D Short, Tracy C Leskey
Drosophila suzukii Matsumura (Diptera: Drosophilidae) is an invasive, polyphagous fruit fly that attacks soft-skinned fruits. Originally from Asia, D. suzukii has successfully invaded the United States and the European and South American countries. At present, calendar-based insecticide applications are used to combat D. suzukii. Here, we evaluate a behaviorally based attract-and-kill management technique using attracticidal spheres to reduce D. suzukii infestations in raspberries. In laboratory bioassays aimed at identifying effective toxicants, attracticidal spheres containing dinotefuran at 1...
March 7, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334359/effectiveness-of-microbial-and-chemical-insecticides-for-supplemental-control-of-bollworm-on-bt-and-non-bt-cottons
#18
N S Little, R G Luttrell, K C Allen, O P Perera, K A Parys
Laboratory and field experiments were conducted to determine the effectiveness of microbial and chemical insecticides for supplemental control of bollworm, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae), on non-Bt (DP1441RF) and Bt (DP1321B2RF) cottons. Neonate and 3rd instar larvae survival was evaluated on leaf tissue treated with microbial and chemical insecticides including a commercial formulation of Bacillus thuringiensis (Dipel), a Heliothis (Helicoverpa) nuclear polyhedrosis virus (NPV; Gemstar), λ-cyhalothrin (Karate Z), and chlorantraniliprole (Prevathon)...
March 18, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334350/relative-susceptibility-of-phyllocnistis-citrella-lepidoptera-gracillariidae-to-commonly-used-insecticides-in-maharashtra-india
#19
Anjitha George, C N Rao, Sonali Ghike, Vijay Dhengre
Foliar application of insecticides has been the most commonly followed practice to manage Phyllocnistis citrella Stainton in nurseries and flush leaves in citrus groves. Leaf dip bioassays were conducted against insecticides, viz., acephate 75SP, dimethoate 30EC, abamectin 1.9EC, fenvalerate 20EC, imidacloprid 17.8SL, and thiamethoxam 25WG, and were tested against P. citrella larvae for their susceptibility. Among six insecticides tested on second-instar P. citrella larvae collected from Nagpur mandarin/acid lime cultivars during 2013-2016, abamectin was the most toxic insecticide for the initial year (LC50 values ranged from 20...
March 3, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334348/evaluation-of-the-potential-for-secondary-kill-for-ingested-insecticides-in-the-common-bed-bug-hemiptera-cimicidae
#20
Yvonne K Matos, Angela Sierras, Coby Schal
Baits are a preferred method of urban pest management. Baits enable more targeted insecticide applications with a fraction of the active ingredient used in residual sprays. Bait translocation by foragers, and consequent secondary kill of nonforagers, enhances bait effectiveness in social insects, and in other group-living species like German cockroaches (Blattella germanica L.). We investigated the potential for secondary kill in bed bugs (Cimex lectularius L.), another gregarious species, using a liquid bait...
March 20, 2017: Journal of Economic Entomology
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