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https://www.readbyqxmd.com/read/28334528/why-prodrugs-and-propesticides-succeed
#1
John E Casida
What are the advantages of bioactivation in optimizing drugs and pesticides? Why are there so many prodrugs and propesticides? These questions are examined here by considering compounds selected on the basis of economic value or market success. The 100 major drugs and 90 major pesticides are divided into ones acting directly and those definitely or possibly requiring bioactivation. Established or candidate prodrugs accounted for 19% of the total drug sales with corresponding values of 20, 37 and 17% for proinsecticides, proherbicides and profungicides...
March 23, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28334411/first-report-of-mating-disruption-with-an-aggregation-pheromone-a-case-study-with-tetropium-fuscum-coleoptera-cerambycidae
#2
Jon Sweeney, Peter J Silk, Marc Rhainds, Wayne MacKay, Cory Hughes, Kate Van Rooyen, Wayne MacKinnon, Gaetan Leclair, Steve Holmes, Edward G Kettela
Tetropium fuscum (F.), native to Europe and established in Nova Scotia, Canada, since at least 1990, is considered a low-to-moderate threat to spruce (Picea spp.) forests in North America and regulated as a quarantine pest by the Canadian Food Inspection Agency. We tested broadcast applications of the aggregation pheromone racemic (5E)-6,10-dimethyl-5,9-undecadien-2-ol (fuscumol), formulated at 10% concentration in Hercon Bio-Flakes (Hercon International, Emigsville, PA), for efficacy in disrupting T. fuscum mating and suppressing populations...
March 16, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334388/bacterial-endosymbionts-of-the-psyllid-cacopsylla-pyricola-hemiptera-psyllidae-in-the-pacific-northwestern-united-states
#3
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/28334379/influence-of-different-hazelnut-cultivars-on-some-demographic-characteristics-of-the-filbert-aphid-hemiptera-aphididae
#4
Ali Güncan, Ebru Gümüs
The filbert aphid Myzocallis coryli (Goeze) is a serious pest of hazelnut in North America, Italy, Spain, and Turkey. To evaluate the resistance of hazelnut to this insect, aphids were reared on five major cultivars ('Tombul,' 'Palaz,' 'Çakıldak,' 'Foşa,' and 'Mincane') under laboratory conditions. The developmental times of preadult and adult stages, total longevity, reproduction, and life table parameters were analyzed according to age-stage, two-sex life table theory, in which the stage differentiation and variable developmental rates among individuals could be described...
March 13, 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
#5
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
https://www.readbyqxmd.com/read/28334341/large-scale-evaluation-of-association-between-pheromone-trap-captures-and-cotton-boll-infestation-for-pink-bollworm-lepidoptera-gelechiidae
#6
Yves Carrière, Larry Antilla, Leighton Liesner, Bruce E Tabashnik
Although transgenic cotton producing insecticidal proteins from Bacillus thuringiensis (Bt) is a cornerstone for pink bollworm control in some countries, integrated pest management remains important for bolstering sustainability of Bt cotton and is critical for controlling pink bollworm where Bt cotton is not available or where this pest has evolved resistance to Bt cotton. Here, we used data on moth captures in gossyplure-baited pheromone traps and boll infestations for 163 Bt and 152 non-Bt cotton fields from Arizona to evaluate accuracy of chemical control decisions relying on moth trapping data and capacity of Bt cotton to suppress survival of offspring produced by moths...
March 16, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334331/alterations-of-immune-parameters-on-trichoplusia-ni-lepidoptera-noctuidae-larvae-exposed-to-extremely-low-frequency-electromagnetic-fields
#7
Jose A Valadez-Lira, Nahui O Medina-Chavez, Alonso A Orozco-Flores, J Antonio Heredia-Rojas, Abraham O Rodriguez-de la Fuente, Ricardo Gomez-Flores, Juan M Alcocer-Gonzalez, Patricia Tamez-Guerra
Worldwide mobile telephone and microwave use have resulted in an increasing presence of extremely low-frequency electromagnetic field radiations (ELF-EMFs) in ecosystems. ELF-EMFs have been associated with altered physiological processes that can adversely affect exposed organisms. In this study, Trichoplusia ni Hübner larvae were exposed for 24, 48, or 72 h to ELF-EMFs (60 Hz and 2.0 mT) to assess effects on immune response parameters and fertility. Trichoplusia ni life cycle and fertility were not affected by 24-h exposure...
March 6, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28334330/survivorship-of-z-pheromone-race-european-corn-borer-lepidoptera-crambidae-on-a-range-of-host-plants-varying-in-defensive-chemistry
#8
Kelsey E Fisher, Charles E Mason, J Lindsey Flexner, Judith Hough-Goldstein, John H McDonald
The European corn borer, Ostrinia nubilalis (Hübner), was introduced in North America in the early 1900s and became a major pest of corn. After its introduction, it was found on > 200 other plant hosts, but corn remained its primary host. Early life history studies indicated that European corn borer had the potential of a wide host range. For nearly 80 yr before the introduction of Bt corn, the European corn borer was a major pest of corn in North America. This study investigated the growth and survivorship of the Z-pheromone race European corn borer on a range of hosts that vary in defensive chemistries and historic degree of infestation to better understand the current host plant range of Z-pheromone race of O...
March 3, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334322/evaluation-of-food-lures-for-capture-and-monitoring-of-anastrepha-fraterculus-diptera-tephritidae-on-temperate-fruit-trees
#9
J M da Rosa, C J Arioli, J P Dos Santos, A C Menezes-Netto, M Botton
The Anastrepha fraterculus (Wiedemann) (Diptera: Tephritidae) is the main pest of fruit trees grown in temperate climates in the southern region of Brazil. The objective of this work was to evaluate the efficiency of the major commercial food lures used in Brazil for trapping and monitoring of A. fraterculus in plum, pear, and feijoa orchards. The assessed lures were hydrolyzed proteins of animal origin (CeraTrap) and plant origin (BioAnastrepha), torula yeast + borax (Torula), and grape juice. Response variables included the rate of adult capture (flies per trap per day, FTD) and the percentage of females captured...
March 16, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334311/flight-performance-of-ctenoplusia-agnata-lepidoptera-noctuidae
#10
Xiaowei Fu, Shengyuan Zhao, Chao Li, Xiao Wu, Jianglong Guo, Kongming Wu
Ctenoplusia agnata (Staudinger) (Lepidoptera: Noctuidae) is a highly destructive polyphagous pest of cotton, maize, soybean, and cruciferous vegetables in East Asia. The effect of various biotic and abiotic factors on the flight performance of C. agnata is crucial for a better understanding of its transregional migration. In this study, the flight performance of C. agnata moths at different ages, temperatures, and relative humidity (RH) levels, was examined by tethering individual moths to computerized flight mills for a 24-h scotophase...
March 13, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334300/flight-capacity-of-the-walnut-twig-beetle-coleoptera-scolytidae-on-a-laboratory-flight-mill
#11
Aubree M Kees, Andrea R Hefty, Robert C Venette, Steven J Seybold, Brian H Aukema
The walnut twig beetle, Pityophthorus juglandis Blackman, and associated fungus Geosmithia morbida Kolařík, Freeland, Utley, & Tisserat constitute the insect-fungal complex that causes thousand cankers disease in walnut, Juglans spp., and wingnut, Pterocarya spp. Thousand cankers disease is responsible for the decline of Juglans species throughout the western United States and more recently, the eastern United States and northern Italy. We examined the flight capacity of P. juglandis over 24-h trials on a flight mill in the laboratory...
March 16, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28334296/impact-of-thiamethoxam-seed-treatment-on-growth-and-yield-of-rice-oryza-sativa
#12
S K Lanka, S Senthil-Nathan, D J Blouin, M J Stout
Neonicotinoid seed treatments are widely used in agriculture. In rice, Oryza sativa L., in the southern United States, neonicotinoid seed treatments are used to manage early-season populations of the rice water weevil, Lissorhoptrus oryzophilus Kuschel. In addition to their effects on pests, neonicotinoid seed treatments may benefit crop plants directly by increasing plant growth or altering plant responses to stresses. As part of an effort to assess the overall benefits of thiamethoxam seed treatment in rice, rice emergence, growth, and yield were evaluated...
March 7, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334292/the-synergistic-effects-of-almond-protection-fungicides-on-honey-bee-hymenoptera-apidae-forager-survival
#13
Adrian Fisher, Chet Coleman, Clint Hoffmann, Brad Fritz, Juliana Rangel
The honey bee (Apis mellifera L.) contributes ∼$17 billion annually to the United States economy, primarily by pollinating major agricultural crops including almond, which is completely dependent on honey bee pollination for nut set. Almond growers face constant challenges to crop productivity owing to pests and pathogens, which are often controlled with a multitude of agrochemicals. For example, fungicides are often applied in combination with other products to control fungal pathogens during almond bloom...
March 21, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334271/a-temperature-dependent-phenology-model-for-liriomyza-huidobrensis-diptera-agromyzidae
#14
Norma Mujica, Marc Sporleder, Pablo Carhuapoma, Jürgen Kroschel
Liriomyza huidobrensis (Blanchard) is an economically important and highly polyphagous worldwide pest. To establish a temperature-dependent phenology model, essential for understanding the development and growth of the pest population under a variety of climates and as part of a pest risk analysis, L. huidobrensis life-table data were collected under laboratory conditions at seven constant temperatures on its host faba bean (Vicia faba L.). Several nonlinear equations were fitted to each life stage to model the temperature-dependent population growth and species life history and finally compile an overall temperature-dependent pest phenology model using the Insect Life Cycle Modeling (ILCYM) software...
March 8, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334264/spatial-patterns-and-sequential-sampling-plans-for-predators-of-aphis-glycines-hemiptera-aphididae-in-minnesota-soybean
#15
Anh K Tran, Robert L Koch
The soybean aphid, Aphis glycines Matsumura, is an economically important soybean pest. Many studies have demonstrated that predatory insects are important in suppressing A. glycines population growth. However, to improve the utilization of predators in A. glycines management, sampling plans need to be developed and validated for predators. Aphid predators were sampled in soybean fields near Rosemount, Minnesota, from 2006-2007 and 2013-2015 with sample sizes of 20-80 plants. Sampling plans were developed for Orius insidiosus (Say), Harmonia axyridis (Pallas), and all aphidophagous Coccinellidae species combined...
March 15, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28334260/implicating-abc-transporters-in-insecticide-resistance-research-strategies-and-a-decision-framework
#16
Ryan C Gott, Grace R Kunkel, Emily S Zobel, Brian R Lovett, David J Hawthorne
Pest insects damage crops, transmit diseases, and are household nuisances. Historically, they have been controlled with insecticides, but overuse often leads to resistance to one or more of these chemicals. Insects gain resistance to insecticides through behavioral, metabolic, genetic, and physical mechanisms. One frequently overlooked strategy is through the use of ATP-binding cassette (ABC) transporters. ABC transporters, present in all domains of life, perform natural excretory functions, thus the exploitation of these transporters to excrete insecticides and contribute to resistance is highly plausible...
February 28, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334259/population-distribution-and-range-expansion-of-the-invasive-mexican-rice-borer-lepidoptera-crambidae-in-louisiana
#17
Blake E Wilson, Julien M Beuzelin, Thomas E Reagan
The Mexican rice borer, Eoreuma loftini (Dyar) (Lepidoptera: Crambidae), is an invasive pest that was first introduced into southern Texas in 1980 and has been expanding its range eastward along the United States Gulf Coast. The pest attacks rice (Oryza sativa L.), sugarcane (Saccharum spp.), corn (Zea mays L.), and other graminaceous crops, and its establishment in Louisiana is expected to have severe economic impacts on crop production. Range expansion and population distribution of E. loftini were monitored with a network of 77 pheromone traps throughout southwestern Louisiana from 2013 to 2015...
March 2, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28334254/selection-realized-heritability-and-fitness-cost-associated-with-dimethoate-resistance-in-a-field-population-of-culex-quinquefasciatus-diptera-culicidae
#18
Mehboob Alam, Muhammad Waqas Sumra, Daniyal Ahmad, Rizwan Mustafa Shah, Muhammad Binyameen, Sarfraz Ali Shad
Mosquitoes are known to be vectors of numerous diseases leading to human morbidity and mortality at large scale in the world. Insecticide resistance has become a serious concern in controlling the insect vectors of public health importance. Dimethoate is an organophosphate insecticide used to control different insect pests including mosquitoes. Biological parameters of susceptible, unselected, and dimethoate-selected strains of Culex quinquefasciatus Say were studied in the laboratory to recognize resistance development potential and associated fitness cost...
March 14, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334253/effect-of-the-insecticide-dinotefuran-on-the-ultrastructure-of-the-flight-muscle-of-female-sogatella-furcifera-hemiptera-delphacidae
#19
M G Liu, C X Jiang, M Mao, C Liu, Q Li, X G Wang, Q F Yang, H J Wang
Sogatella furcifera Horváth (Hemiptera: Delphacidae), is a major migratory pest of rice crops in Asia. The ultrastructure of the flight muscle directly affects the flight ability of insects. The ultrastructure of the flight muscle of some insects can be affected by insecticides. However, the ultrastructure of the flight muscle of S. furcifera and the effect of insecticides on the flight muscle of S. furcifera are not well understood. The present study was conducted to determine the effect of the insecticide dinotefuran on the ultrastructure of the flight muscle of S...
February 25, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334249/lethal-and-sublethal-effects-of-some-chemical-and-biological-insecticides-on-tuta-absoluta-lepidoptera-gelechiidae-eggs-and-neonates
#20
Z Nozad-Bonab, M J Hejazi, Sh Iranipour, M Arzanlou
Tuta absoluta (Meyrick) is one of the serious pests of tomatoes. This study was conducted to evaluate the effects of some chemical and biological insecticides on T. absoluta . The insecticides tested were diazinon, dichlorvos, chlorantraniliprole, deltamethrin, acetamiprid, imidacloprid, spinosad, abamectin, indoxacarb, Bacillus thuringiensis Berliner, Beauveria bassiana (Balsamo) Vuillemin, and Metarhizium anisopliae (Metschnikoff) Sorokin. Sublethal effects for the most effective insecticides tested, namely, abamectin, spinosad, chlorantraniliprole, and indoxacarb were assessed, and life table parameters were calculated...
March 13, 2017: Journal of Economic Entomology
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