727 research outputs found

    A Comprehensive Collection of Accounting Methods and Principles: A Case by Case Analysis

    Get PDF
    The purpose of this thesis is to address the most commonly accepted accounting methods and principles used in practice and apply them to companies’ financial statements. This thesis uses examples from companies’ financial statements, management discussion and analysis, 10k reports, quarterly reports, and various other statements in conjunction with a particular topic of financial accounting. This thesis begins by applying accounting principles to specific companies. Certain topics include revenue recognition, the time value of money, tradeable securities, pension plans, and various other topics. Each topic is broken down by a section. Inside these sections will be supporting data, journal entries, and calculations. The format of this thesis is broken down on a case by case application to these specific accounting topics

    Fumonisin B-Glucose Reaction Products Are Less Toxic When Fed to Swine

    Get PDF
    The effects of fumonisin B-glucose reaction products in swine diets was examined. Pigs were fed diets containing 528 µmol of total fumonisin B/kg (FB), 528 µmol of total FB-glucose adducts/kg (FB-G, 122 µmol of unreacted FB/kg), or 0 µmol of total FB/kg for 15 days to test the efficacy of the FB-G reaction products in detoxifying FB. Weight gain in FB pigs was lower than in FB-G or controls, which was correlated with feed intake reduction in FB pigs. Serum aspartate aminotransferase, γ-glutamyltransferase, and total bilirubin in FB pigs were higher than in FB-G or control pigs. Serum sphinganine/shingosine ratios in FB pigs were higher than in FB-G or control pigs. Microscopic examination of tissues from FB pigs showed generalized liver necrosis and apoptosis with marked cellular pleomorphism and disorganized hepatic cords. The liver and kidneys in the FB-G group appeared to be normal. Tissues of controls were free of lesions. Results suggest that dietary FB-G products are less toxic to swine and may provide an detoxification approach in instances of widespread FB grain contamination (p \u3c 0.05)

    Periodization and self-regulation in action sports: Coping with the emotional load

    Get PDF
    Action sports usually include some danger and personal challenge. The levels of both are often further increased when the sport is placed in a competitive environment. In this paper, we consider the Olympic disciplines of freeskiing and snowboarding in park and pipe. We consider some pertinent theoretical perspectives, then offer some insights on their operation using a range of data from ongoing research and support work. Finally, we offer a number of practical steps which can be taken to optimize performance, both in learning and practicing new tricks and in executing them under the pressures of competition

    UBVRI Light Curves of 44 Type Ia Supernovae

    Get PDF
    We present UBVRI photometry of 44 type-Ia supernovae (SN Ia) observed from 1997 to 2001 as part of a continuing monitoring campaign at the Fred Lawrence Whipple Observatory of the Harvard-Smithsonian Center for Astrophysics. The data set comprises 2190 observations and is the largest homogeneously observed and reduced sample of SN Ia to date, nearly doubling the number of well-observed, nearby SN Ia with published multicolor CCD light curves. The large sample of U-band photometry is a unique addition, with important connections to SN Ia observed at high redshift. The decline rate of SN Ia U-band light curves correlates well with the decline rate in other bands, as does the U-B color at maximum light. However, the U-band peak magnitudes show an increased dispersion relative to other bands even after accounting for extinction and decline rate, amounting to an additional ~40% intrinsic scatter compared to B-band.Comment: 84 authors, 71 pages, 51 tables, 10 figures. Accepted for publication in the Astronomical Journal. Version with high-res figures and electronic data at http://astron.berkeley.edu/~saurabh/cfa2snIa

    Association between ants (Hymenoptera: Formicidae) and the vine mealybug (Hemiptera: Pseudococcidae) in table-grape vineyards in Eastern Spain

    Full text link
    [EN] BACKGROUNDThe vine mealybug, Planococcus ficus (Signoret) (Hemiptera: Pseudococcidae) is a key pest of grapevine in the Mediterranean Basin. Some honeydew collecting ant species are known to increase mealybug populations in other grape-growing regions. However, there is scarce information on either the ant species present in Mediterranean vineyards or their impact on mealybugs. We conducted a study in four commercial vineyards in Eastern Spain in order to i) identify the ant species foraging on the vine canopies, ii) study the association among ant activity, vine mealybug abundance and fruit damage, and iii) test a novel method for ant management, distracting ants from guarding vine mealybugs by providing sugar dispensers. RESULTSWe recorded three ant species native to the Mediterranean foraging on the vine canopies: Lasius grandis (Forel), Pheidole pallidula (Nylander) and Plagiolepis schmitzii (Forel). The mean percentage of damaged fruits per vine was positively correlated with the number of vine mealybugs captured in traps placed at the trunk. We detected a positive but weak relationship between ant activity, vine mealybug abundance and fruit damage. The provisioning of sugar dispensers reduced the number of ants foraging on the vines by 23.4% although this reduction was not statistically significant. Vine mealybug abundance was significantly reduced (72%) after sugar provisioning. CONCLUSIONOur results suggest that the ant species native to vineyards in eastern Spain induce population increases of the vine mealybug. Moreover, the provisioning of sugars can be a valuable tool for ant management and mealybug control. (c) 2017 Society of Chemical IndustryWe are grateful to two anonymous reviewers for their comments. This research was supported by the European grants FP7-IAPP #324475 'Colbics' and FP7-IRSES #612566 'Biomodics'.Beltrà Ivars, A.; Navarro Campos, C.; Calabuig Gomar, A.; Estopa, L.; Wäckers, F.; Pekas, A.; Soto Sánchez, AI. (2017). Association between ants (Hymenoptera: Formicidae) and the vine mealybug (Hemiptera: Pseudococcidae) in table-grape vineyards in Eastern Spain. Pest Management Science. 73(12):2473-2480. https://doi.org/10.1002/ps.4640S247324807312Ramzi, M., Kaouthar, G.-L., Pompeo, S., Gaetana, M., & Agatino, R. (2017). Key scale insects (Hemiptera: Coccoidea) of high economic importance in a Mediterranean area: host plants, bio-ecological characteristics, natural enemies and pest management strategies – a review. Plant Protection Science, 53(No. 1), 1-14. doi:10.17221/53/2016-ppsDaane, K. M., Almeida, R. P. P., Bell, V. A., Walker, J. T. S., Botton, M., Fallahzadeh, M., … Zaviezo, T. (2012). Biology and Management of Mealybugs in Vineyards. Arthropod Management in Vineyards:, 271-307. doi:10.1007/978-94-007-4032-7_12García Morales M Denno B Miller DR Miller GL Ben-Dov Y Hardy NB http://scalenet.infoBerlinger, M. J. (1977). The Mediterranean vine mealybug and its natural enemies in southern Israel. Phytoparasitica, 5(1), 3-14. doi:10.1007/bf03179429Tsai, C.-W., Chau, J., Fernandez, L., Bosco, D., Daane, K. M., & Almeida, R. P. P. (2008). Transmission of Grapevine leafroll-associated virus 3 by the Vine Mealybug (Planococcus ficus). Phytopathology®, 98(10), 1093-1098. doi:10.1094/phyto-98-10-1093Almeida, R. P. P., Daane, K. M., Bell, V. A., Blaisdell, G. K., Cooper, M. L., Herrbach, E., & Pietersen, G. (2013). Ecology and management of grapevine leafroll disease. Frontiers in Microbiology, 4. doi:10.3389/fmicb.2013.00094Bartlett, B. R. (1961). The Influence of Ants Upon Parasites, Predators, and Scale Insects1. Annals of the Entomological Society of America, 54(4), 543-551. doi:10.1093/aesa/54.4.543González-Hernández, H., Johnson, M. W., & Reimer, N. J. (1999). Impact of Pheidole megacephala (F.) (Hymenoptera: Formicidae) on the Biological Control of Dysmicoccus brevipes (Cockerell) (Homoptera: Pseudococcidae). Biological Control, 15(2), 145-152. doi:10.1006/bcon.1999.0714Helms, K. R., & Vinson, S. B. (2002). WIDESPREAD ASSOCIATION OF THE INVASIVE ANT SOLENOPSIS INVICTA WITH AN INVASIVE MEALYBUG. Ecology, 83(9), 2425-2438. doi:10.1890/0012-9658(2002)083[2425:waotia]2.0.co;2Zhou, A., Zeng, L., Lu, Y., Xu, Y., & Liang, G. (2012). Fire Ants Protect Mealybugs against Their Natural Enemies by Utilizing the Leaf Shelters Constructed by the Leaf Roller Sylepta derogata. PLoS ONE, 7(11), e49982. doi:10.1371/journal.pone.0049982DEGEN, A. A., & GERSANI, M. (1989). Environmental effects on activity and honeydew collection by the weaver antPolyrhachis simplex(Hymenoptera: Formicidae) when attending the mealybugTrabutinasp. (Homoptera: Pseudococcidae). Journal of Zoology, 218(3), 421-432. doi:10.1111/j.1469-7998.1989.tb02554.xCudjoe, A. R., Neuenschwander, P., & Copland, M. J. W. (1993). Interference by ants in biological control of the cassava mealybug Phenacoccus manihoti (Hemiptera: Pseudococcidae) in Ghana. Bulletin of Entomological Research, 83(1), 15-22. doi:10.1017/s0007485300041730DAANE, K. M., SIME, K. R., FALLON, J., & COOPER, M. L. (2007). Impacts of Argentine ants on mealybugs and their natural enemies in California’s coastal vineyards. Ecological Entomology, 32(6), 583-596. doi:10.1111/j.1365-2311.2007.00910.xWay, M. J. (1963). Mutualism Between Ants and Honeydew-Producing Homoptera. Annual Review of Entomology, 8(1), 307-344. doi:10.1146/annurev.en.08.010163.001515Buckley, R., & Gullan, P. (1991). More Aggressive Ant Species (Hymenoptera: Formicidae) Provide Better Protection for Soft Scales and Mealybugs (Homoptera: Coccidae, Pseudococcidae). Biotropica, 23(3), 282. doi:10.2307/2388205Tena, A., Hoddle, C. D., & Hoddle, M. S. (2013). Competition between honeydew producers in an ant–hemipteran interaction may enhance biological control of an invasive pest. Bulletin of Entomological Research, 103(6), 714-723. doi:10.1017/s000748531300045xMgocheki, N., & Addison, P. (2010). Spatial distribution of ants (Hymenoptera: Formicidae), vine mealybugs and mealybug parasitoids in vineyards. Journal of Applied Entomology, 134(4), 285-295. doi:10.1111/j.1439-0418.2009.01494.xMgocheki, N., & Addison, P. (2009). Interference of ants (Hymenoptera: Formicidae) with biological control of the vine mealybug Planococcus ficus (Signoret) (Hemiptera: Pseudococcidae). Biological Control, 49(2), 180-185. doi:10.1016/j.biocontrol.2009.02.001Mansour, R., Suma, P., Mazzeo, G., La Pergola, A., Pappalardo, V., Grissa Lebdi, K., & Russo, A. (2012). Interactions between the antTapinoma nigerrimum(Hymenoptera: Formicidae) and the main natural enemies of the vine and citrus mealybugs (Hemiptera: Pseudococcidae). Biocontrol Science and Technology, 22(5), 527-537. doi:10.1080/09583157.2012.665832Carabalí-Banguero, D. J., Wyckhuys, K. A. G., Montoya-Lerma, J., Kondo, T., & Lundgren, J. G. (2013). Do additional sugar sources affect the degree of attendance ofDysmicoccus brevipesby the fire antSolenopsis geminata? Entomologia Experimentalis et Applicata, 148(1), 65-73. doi:10.1111/eea.12076Nyamukondiwa, C., & Addison, P. (2011). Preference of foraging ants (Hymenoptera: Formicidae) for bait toxicants in South African vineyards. Crop Protection, 30(8), 1034-1038. doi:10.1016/j.cropro.2011.03.014Tollerup, K. E., Rust, M. K., Dorschner, K. W., Phillips, P. A., & Klotz, J. H. (2004). Low-toxicity baits control ants in citrus orchards and grape vineyards. California Agriculture, 58(4), 213-217. doi:10.3733/ca.v058n04p213Buczkowski, G., Roper, E., Chin, D., Mothapo, N., & Wossler, T. (2014). Hydrogel baits with low-dose thiamethoxam for sustainable Argentine ant management in commercial orchards. Entomologia Experimentalis et Applicata, 153(3), 183-190. doi:10.1111/eea.12239Daane, K. M., Sime, K. R., Hogg, B. N., Bianchi, M. L., Cooper, M. L., Rust, M. K., & Klotz, J. H. (2006). Effects of liquid insecticide baits on Argentine ants in California’s coastal vineyards. Crop Protection, 25(6), 592-603. doi:10.1016/j.cropro.2005.08.015Cooper, M. L., Daane, K. M., Nelson, E. H., Varela, L. G., Battany, M. C., Tsutsui, N. D., & Rust, M. K. (2008). Liquid baits control Argentine ants sustainably in coastal vineyards. California Agriculture, 62(4), 177-183. doi:10.3733/ca.v062n04p177Costello, M. J., & Welch, M. D. (2014). Influence of Weeds on Argentine Ant (Hymenoptera: Formicidae) and Obscure Mealybug (Hemiptera: Pseudococcidae) in a Central California Vineyard. Journal of Economic Entomology, 107(3), 1194-1200. doi:10.1603/ec13469Nagy, C., Cross, J. V., & Markó, V. (2013). Sugar feeding of the common black ant, Lasius niger (L.), as a possible indirect method for reducing aphid populations on apple by disturbing ant-aphid mutualism. Biological Control, 65(1), 24-36. doi:10.1016/j.biocontrol.2013.01.005Mansour, R., Mazzeo, G., Pergola, A., Lebdi, K., & Russo, A. (2011). A Survey of Scale Insects (Hemiptera: Coccoidea) and Tending Ants in Tunisian Vineyards. Journal of Plant Protection Research, 51(3). doi:10.2478/v10045-011-0034-8Pekas, A., Tena, A., Aguilar, A., & Garcia-Marí, F. (2010). Effect of Mediterranean Ants (Hymenoptera: Formicidae) on California Red Scale (Hemiptera: Diaspididae) Populations in Citrus Orchards. Environmental Entomology, 39(3), 827-834. doi:10.1603/en09207Crawley MJ The R Book John Wiley New York 950 2007Pekas, A., Tena, A., Aguilar, A., & Garcia-Marí, F. (2010). Spatio-temporal patterns and interactions with honeydew-producing Hemiptera of ants in a Mediterranean citrus orchard. Agricultural and Forest Entomology, 13(1), 89-97. doi:10.1111/j.1461-9563.2010.00501.xSanchez, J. A., & Ortín-Angulo, M. C. (2012). Abundance and population dynamics of Cacopsylla pyri (Hemiptera: Psyllidae) and its potential natural enemies in pear orchards in southern Spain. Crop Protection, 32, 24-29. doi:10.1016/j.cropro.2011.11.003Cerdá, X., Palacios, R., & Retana, J. (2009). Ant Community Structure in Citrus Orchards in the Mediterranean Basin: Impoverishment as a Consequence of Habitat Homogeneity. Environmental Entomology, 38(2), 317-324. doi:10.1603/022.038.0203Calabuig, A., Garcia-Marí, F., & Pekas, A. (2013). Ants affect the infestation levels but not the parasitism of honeydew and non-honeydew producing pests in citrus. Bulletin of Entomological Research, 104(4), 405-417. doi:10.1017/s0007485313000564CALABUIG, A., TENA, A., WÄCKERS, F. L., FERNÁNDEZ-ARROJO, L., PLOU, F. J., GARCIA-MARÍ, F., & PEKAS, A. (2015). Ants impact the energy reserves of natural enemies through the shared honeydew exploitation. Ecological Entomology, 40(6), 687-695. doi:10.1111/een.12237Walters, A. C., & Mackay, D. A. (2003). An experimental study of the relative humidity preference and survival of the Argentine ant, Linepithema humile (Hymenoptera, Formicidae): comparisons with a native Iridomyrmex species in South Australia. Insectes Sociaux, 50(4), 355-360. doi:10.1007/s00040-003-0685-1CAMPOS, M., FERNANDEZ, L., RUANO, F., COTES, B., CARDENAS, M., & CASTRO, J. (2011). Short term response of ants to the removal of ground cover in organic olive orchards. European Journal of Entomology, 108(3), 417-423. doi:10.14411/eje.2011.053Detrain, C. (1990). Field study on foraging by the polymorphic ant species,Pheidole pallidula. Insectes Sociaux, 37(4), 315-332. doi:10.1007/bf02225995Cerdá, X., Retana, J., & Cros, S. (1998). Critical thermal limits in Mediterranean ant species: trade-off between mortality risk and foraging performance. Functional Ecology, 12(1), 45-55. doi:10.1046/j.1365-2435.1998.00160.xGEIGER, C. A., & DAANE, K. M. (2001). Seasonal Movement and Distribution of the Grape Mealybug (Homoptera: Pseudococcidae): Developing a Sampling Program for San Joaquin Valley Vineyards. Journal of Economic Entomology, 94(1), 291-301. doi:10.1603/0022-0493-94.1.291Sime, K. R., & Daane, K. M. (2014). A Comparison of Two Parasitoids (Hymenoptera: Encyrtidae) of the Vine Mealybug: Rapid, Non-Discriminatory Oviposition Is Favored When Ants Tend the Host. Environmental Entomology, 43(4), 995-1002. doi:10.1603/en13192Beltrà, A., Soto, A., & Tena, A. (2015). How a slow-ovipositing parasitoid can succeed as a biological control agent of the invasive mealybug Phenacoccus peruvianus: implications for future classical and conservation biological control programs. BioControl, 60(4), 473-484. doi:10.1007/s10526-015-9663-6Offenberg, J. (2001). Balancing between mutualism and exploitation: the symbiotic interaction between Lasius ants and aphids. Behavioral Ecology and Sociobiology, 49(4), 304-310. doi:10.1007/s002650000303Engel, V., Fischer, M. K., Wäckers, F. L., & Völkl, W. (2001). Interactions between extrafloral nectaries, aphids and ants: are there competition effects between plant and homopteran sugar sources? Oecologia, 129(4), 577-584. doi:10.1007/s004420100765Wäckers, F. L., Alberola, J. S., Garcia-Marí, F., & Pekas, A. (2017). Attract and distract: Manipulation of a food-mediated protective mutualism enhances natural pest control. Agriculture, Ecosystems & Environment, 246, 168-174. doi:10.1016/j.agee.2017.05.03
    corecore