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https://www.readbyqxmd.com/read/27918418/insecticide-effect-of-zeolites-on-the-tomato-leafminer-tuta-absoluta-lepidoptera-gelechiidae
#1
Caroline De Smedt, Veerle Van Damme, Patrick De Clercq, Pieter Spanoghe
(1) Background: The tomato leafminer Tuta absoluta (Lepidoptera: Gelechiidae) is a key tomato insect pest. At present, it is considered to be a serious threat in various countries in Europe, North Africa, and Middle East. The extensive use and the developed resistance of T. absoluta to spinosad causes some concern, which leads to the need for alternative products. (2) Materials and Methods: Several laboratory experiments were conducted to investigate the ovicidal properties of a zeolite particle film on T. absoluta...
December 2, 2016: Insects
https://www.readbyqxmd.com/read/27918417/efficacy-of-nitric-oxide-fumigation-for-controlling-codling-moth-in-apples
#2
Yong-Biao Liu, Xiangbing Yang, Gregory Simmons
Nitric oxide (NO) fumigation under ultralow oxygen (ULO) conditions was studied for its efficacy in controlling codling moth and effects on postharvest quality of apples. NO fumigation was effective against eggs and larvae of different sizes on artificial diet in 48 h treatments. Small larvae were more susceptible to nitric oxide than other stages at 0.5% NO concentration. There were no significant differences among life stages at 1.0% to 2.0% NO concentrations. In 24 h treatments of eggs, 3.0% NO fumigation at 2 °C achieved 100% egg mortality...
December 2, 2016: Insects
https://www.readbyqxmd.com/read/27916820/biological-control-beneath-the-feet-a-review-of-crop-protection-against-insect-root-herbivores
#3
REVIEW
Alan Kergunteuil, Moe Bakhtiari, Ludovico Formenti, Zhenggao Xiao, Emmanuel Defossez, Sergio Rasmann
Sustainable agriculture is certainly one of the most important challenges at present, considering both human population demography and evidence showing that crop productivity based on chemical control is plateauing. While the environmental and health threats of conventional agriculture are increasing, ecological research is offering promising solutions for crop protection against herbivore pests. While most research has focused on aboveground systems, several major crop pests are uniquely feeding on roots. We here aim at documenting the current and potential use of several biological control agents, including micro-organisms (viruses, bacteria, fungi, and nematodes) and invertebrates included among the macrofauna of soils (arthropods and annelids) that are used against root herbivores...
November 29, 2016: Insects
https://www.readbyqxmd.com/read/27916802/positive-and-negative-impacts-of-non-native-bee-species-around-the-world
#4
REVIEW
Laura Russo
Though they are relatively understudied, non-native bees are ubiquitous and have enormous potential economic and environmental impacts. These impacts may be positive or negative, and are often unquantified. In this manuscript, I review literature on the known distribution and environmental and economic impacts of 80 species of introduced bees. The potential negative impacts of non-native bees include competition with native bees for nesting sites or floral resources, pollination of invasive weeds, co-invasion with pathogens and parasites, genetic introgression, damage to buildings, affecting the pollination of native plant species, and changing the structure of native pollination networks...
November 28, 2016: Insects
https://www.readbyqxmd.com/read/27898001/potential-for-using-acetic-acid-plus-pear-ester-combination-lures-to-monitor-codling-moth-in-an-sit-program
#5
Gary J R Judd
Studies were conducted in commercial apple orchards in British Columbia, Canada, to determine whether lures combining ethyl-(E,Z)-2,4-decadienoate, pear ester (PE), with either acetic acid (AA) or sex pheromone, (E,E)-8,10-dodecadien-1-ol (codlemone), might improve monitoring of codling moth, Cydia pomonella (L.), in an area-wide programme integrating sterile insect technology (SIT) and mating disruption (MD). Catches of sterile and wild codling moths were compared in apple orchards receiving weekly delivery of sterile moths (1:1 sex ratio) using white delta traps baited with either AA or PE alone, and in combination...
November 25, 2016: Insects
https://www.readbyqxmd.com/read/27886136/interactions-between-the-multicolored-asian-lady-beetle-harmonia-axyridis-and-the-parasitoid-dinocampus-coccinellae
#6
Maria Luisa Dindo, Santolo Francati, Alberto Lanzoni, Cinzia di Vitantonio, Elisa Marchetti, Giovanni Burgio, Stefano Maini
Harmonia axyridis (Pallas) has been introduced either intentionally or accidentally in different areas outside its native range, where it is often regarded as invasive. Dinocampus coccinellae (Schrank) has been recorded to parasitize H. axyridis in the field, both in the native and introduced areas, Italy included. The percent of parasitism found in our field investigation was low (four percent). The effect of exposure time of H. axyridis to D. coccinellae and the impact of parasitization on host longevity, oviposition capacity and egg fertility were evaluated in the laboratory...
November 24, 2016: Insects
https://www.readbyqxmd.com/read/27879644/efficacy-of-topical-application-leaf-residue-or-soil-drench-of-blastospores-of-isaria-fumosorosea-for-citrus-root-weevil-management-laboratory-and-greenhouse-investigations
#7
Pasco B Avery, Wayne B Hunter, David G Hall, Mark A Jackson, Charles A Powell
The efficacy of topical, leaf residue, and soil drench applications with Isaria fumosorosea blastospores (Ifr strain 3581) was assessed for the management of the citrus root weevil, Diaprepes abbreviatus (L.). Blastospores of Ifr were applied topically at a rate of 10⁷ blastospores mL(-1) on both the larvae and adults, and each insect stage was incubated in rearing cups with artificial diet at 25 °C, either in the dark or in a growth chamber under a 16 h photophase for 2 weeks, respectively. Percent larval and adult mortality due to the infection of Ifr was assessed after 14 days as compared to untreated controls...
November 22, 2016: Insects
https://www.readbyqxmd.com/read/27869724/mosquito-oviposition-behavior-and-vector-control
#8
REVIEW
Jonathan F Day
The burden of gene transfer from one mosquito generation to the next falls on the female and her eggs. The selection of an oviposition site that guarantees egg and larval survival is a critical step in the reproductive process. The dangers associated with ephemeral aquatic habitats, lengthy droughts, freezing winters, and the absence of larval nutrition makes careful oviposition site selection by a female mosquito extremely important. Mosquito species exhibit a remarkable diversity of oviposition behaviors that ensure eggs are deposited into microenvironments conducive for successful larval development and the emergence of the next mosquito generation...
November 18, 2016: Insects
https://www.readbyqxmd.com/read/27845714/beyond-focal-pests-impact-of-a-neonicotinoid-seed-treatment-and-resistant-soybean-lines-on-a-non-target-arthropod
#9
Tülin Özsisli, Deirdre A Prischmann-Voldseth
Integrated pest management (IPM) tactics may effectively control focal pests, but it is also important to test the compatibility of different tactics, and consider non-target organisms. We investigated the effects of a neonicotinoid seed treatment and Rag resistance genes used for soybean aphid (Aphis glycines Matsumura) control on reproduction of a non-target herbivore (twospotted spider mite, Tetranychus urticae Koch) in short-term greenhouse experiments. We also examined interactions between spider mites and a specialist phytoseiid mite [Ambylseius fallacis (Garman)] and assessed the effects of a co-occurring opportunistic omnivore [Frankliniella occidentalis (Pergande)] by including thrips density as a covariate...
November 11, 2016: Insects
https://www.readbyqxmd.com/read/27834795/toxicity-and-feeding-deterrent-effect-of-2-methylanthraquinone-from-the-wood-extractives-of-tectona-grandis-on-the-subterranean-termites-coptotermes-formosanus-and-reticulitermes-speratus
#10
Maya Ismayati, Akiko Nakagawa-Izumi, Nadia Nuraniya Kamaluddin, Hiroshi Ohi
No-choice feeding tests using ethanol, chloroform, and acetone extractives of teak (Tectona grandis) heartwood clearly showed feeding deterrent activity and toxicity to the subterranean termite Reticulitermes speratus. The amount of 2-methylanthraquinone (MAQ) in teak wood extractives was not related to the feeding deterrents or toxicity, as shown by the no-choice feeding tests conducted using crude extractives containing various amounts of MAQ, MAQ alone, and fractions of crude extractives. As a native pest, the subterranean termite Coptotermes formosanus was more tolerant to the fractions of crude extractives than Reticulitermes speratus, and the mortality observed in C...
November 8, 2016: Insects
https://www.readbyqxmd.com/read/27827916/switchgrass-panicum-virgatum-intercropping-within-managed-loblolly-pine-pinus-taeda-does-not-affect-wild-bee-communities
#11
Joshua W Campbell, Darren A Miller, James A Martin
Intensively-managed pine (Pinus spp.) have been shown to support diverse vertebrate communities, but their ability to support invertebrate communities, such as wild bees, has not been well-studied. Recently, researchers have examined intercropping switchgrass (Panicum virgatum), a native perennial, within intensively managed loblolly pine (P. taeda) plantations as a potential source for cellulosic biofuels. To better understand potential effects of intercropping on bee communities, we investigated visitation of bees within three replicates of four treatments of loblolly pine in Mississippi, U...
November 4, 2016: Insects
https://www.readbyqxmd.com/read/27827869/impacts-of-antibiotic-and-bacteriophage-treatments-on-the-gut-symbiont-associated-blissus-insularis-hemiptera-blissidae
#12
Yao Xu, Eileen A Buss, Drion G Boucias
The Southern chinch bug, Blissus insularis, possesses specialized midgut crypts that harbor dense populations of the exocellular symbiont Burkholderia. Oral administration of antibiotics suppressed the gut symbionts in B. insularis and negatively impacted insect host fitness, as reflected by retarded development, smaller body size, and higher susceptibility to an insecticide, bifenthrin. Considering that the antibiotics probably had non-lethal but toxic effects on host fitness, attempts were conducted to reduce gut symbionts using bacteriophage treatment...
November 3, 2016: Insects
https://www.readbyqxmd.com/read/27809231/collectively-facilitated-behavior-of-the-neonate-caterpillars-of-cactoblastis-cactorum-lepidoptera-pyralidae
#13
Terrence D Fitzgerald, Michael Wolfin, Ryan Young, Katelyn Meyer, Elizabeth Fabozzi
The behavioral biology of the first instar larva of Cactoblastis cactorum was studied from the time of eclosion until the colony penetrated and initiated excavation of the host plant. Hatching from an egg stick was asynchronous, requiring 20 h for the entire cohort to eclose at 50%-70% RH and significantly longer at a lower range of RHs. On eclosion, neonates aggregated in an arena at the base of their egg stick and did not attempt to excavate the cladode until an average of 25 caterpillars had collected, approximately 15 h after the onset of egg hatch...
October 31, 2016: Insects
https://www.readbyqxmd.com/read/27809228/sodium-channel-mutations-and-pyrethroid-resistance-in-aedes-aegypti
#14
REVIEW
Yuzhe Du, Yoshiko Nomura, Boris S Zhorov, Ke Dong
Pyrethroid insecticides are widely used to control insect pests and human disease vectors. Voltage-gated sodium channels are the primary targets of pyrethroid insecticides. Mutations in the sodium channel have been shown to be responsible for pyrethroid resistance, known as knockdown resistance (kdr), in various insects including mosquitoes. In Aedes aegypti mosquitoes, the principal urban vectors of dengue, zika, and yellow fever viruses, multiple single nucleotide polymorphisms in the sodium channel gene have been found in pyrethroid-resistant populations and some of them have been functionally confirmed to be responsible for kdr in an in vitro expression system, Xenopus oocytes...
October 31, 2016: Insects
https://www.readbyqxmd.com/read/27809220/genome-investigations-of-vector-competence-in-aedes-aegypti-to-inform-novel-arbovirus-disease-control-approaches
#15
REVIEW
David W Severson, Susanta K Behura
Dengue (DENV), yellow fever, chikungunya, and Zika virus transmission to humans by a mosquito host is confounded by both intrinsic and extrinsic variables. Besides virulence factors of the individual arboviruses, likelihood of virus transmission is subject to variability in the genome of the primary mosquito vector, Aedes aegypti. The "vectorial capacity" of A. aegypti varies depending upon its density, biting rate, and survival rate, as well as its intrinsic ability to acquire, host and transmit a given arbovirus...
October 30, 2016: Insects
https://www.readbyqxmd.com/read/27775597/susceptibility-of-bemisia-tabaci-meam1-hemiptera-aleyrodidae-to-imidacloprid-thiamethoxam-dinotefuran-and-flupyradifurone-in-south-florida
#16
Hugh A Smith, Curtis A Nagle, Charles A MacVean, Cindy L McKenzie
Populations of Bemisa tabaci MEAM1 were established from nineteen locations in south Florida, primarily from commercial tomato fields, and were tested using a cotton leaf petiole systemic uptake method for susceptibility to the nicotinic acetylcholine agonist insecticides imidacloprid, thiamethoxam, dinotefuran and flupyradifurone. Eleven populations produced LC50s for one or more chemicals that were not significantly different from the susceptible laboratory colony based on overlapping fiducial limits, indicating some degree of susceptibility...
October 20, 2016: Insects
https://www.readbyqxmd.com/read/27775554/looking-backward-looking-forward-the-long-torturous-struggle-with-mosquitoes
#17
Gordon M Patterson
The American anti-mosquito movement grew out of the discovery of the role of mosquitoes in transferring pathogens and public concern about pest and nuisance mosquitoes in the late 1800s. In the 20th century, organized mosquito control in the United States passed through three eras: mechanical, chemical, and integrated mosquito control. Mosquito control in the 21st century faces the challenge of emerging pathogens, invasive mosquito species, and balancing concerns about the environment with effective control strategies...
October 19, 2016: Insects
https://www.readbyqxmd.com/read/27754408/distribution-pest-status-and-fungal-associates-of-euwallacea-nr-fornicatus-in-florida-avocado-groves
#18
Daniel Carrillo, Luisa F Cruz, Paul E Kendra, Teresa I Narvaez, Wayne S Montgomery, Armando Monterroso, Charlotte De Grave, Miriam F Cooperband
Members of a complex of cryptic species, that correspond morphologically to the ambrosia beetle Euwallacea fornicatus (Eichhoff) (Coleoptera: Curculionidae: Scolytinae), were recently found attacking avocado (Persea americana Mill.) in Israel and California. In early 2016, an outbreak of another member of this species complex was detected infesting approximately 1500 avocado trees in an avocado orchard at Homestead, Florida. An area-wide survey was conducted in commercial avocado groves of Miami-Dade County, Florida to determine the distribution and abundance of E...
October 14, 2016: Insects
https://www.readbyqxmd.com/read/27754403/label-free-differential-proteomics-and-quantification-of-exoenzymes-from-isolates-of-the-entomopathogenic-fungus-beauveria-bassiana
#19
Giuseppe Dionisio, Per Kryger, Tove Steenberg
Beauveria bassiana is an entomopathogenic fungus that grows both in vivo and in vitro. In vivo it can colonize live insect hosts, and tissue digestion occurs by secreted hydrolytic exoenzymes. It can also colonize dead insect tissue provided this is free from competing microorganisms. Depending on whether the host is alive or dead the expression (quality/quantity) of the exoenzymes may vary. We have grown several isolates of B. bassiana in shaking flasks for 120 h at 25 °C in order to evaluate the maximal exoenzyme production using two diet regimes...
October 14, 2016: Insects
https://www.readbyqxmd.com/read/27754329/the-differential-effect-of-low-dose-mixtures-of-four-pesticides-on-the-pea-aphid-acyrthosiphon-pisum
#20
Emiliane Taillebois, Steeve H Thany
The modes of action of most insecticides are known, but little information exists regarding the toxicological interactions involving insecticide mixtures at low doses. The effects of mixtures of four insecticides were investigated using LC10 values (concentration leading to 10% mortality), acetamiprid (ACE, 0.235 µg/mL), chlorpyriphos (CHL, 107.0 µg/mL), deltamethrin (DEL, 5.831 µg/mL), and fipronil (FIP, 3.775 µg/mL) on the larvae of the pea aphid, Acyrthosiphon pisum. After 24 h exposure, 6 of the 11 tested combinations, DEL/FIP, ACE/DEL, CHL/FIP, ACE/DEL/FIP, ACE/CHL/FIP, and ACE/DEL/CHL/FIP, were toxic through an additive effect...
October 12, 2016: Insects
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