Effects of natural pyrethrum and synthetic pyrethroids on the tiger mosquito,Aedes albopictus (skuse) and non-target flower-visiting insects in urban green areas of Padua,Italy     

Daria Corcos  Luca Mazzon  Pierfilippo Cerretti  Maurizio Mei  Edoardo Giussani  Andrea Drago 《国际虫害防治杂志》2020,66(3):215-221

Abstract

The tiger mosquito is a key vector of several human diseases and is considered a public health concern worldwide. The implementation of strategies aimed at maximizing mosquito control without affecting non-target insect groups is of major importance. In a field trial, we tested the efficiency of a natural pyrethrum-based vs. a synthetic pyrethroid-based insecticide in reducing tiger mosquito population and how they affect the diversity of non-target flower-visiting insects in green urban areas. Only the pyrethroid insecticide was effective in reducing mosquito abundance, although its effects disappeared nine days after application. The two adulticides did not significantly affect the diversity of flower-visiting insects, probably because of their large body size and the difference in flying and foraging activity. To effectively control mosquito populations while preventing intoxication of non-target flower-visiting insects, adulticide applications should be applied early in the morning and only on bushes and trees. Results from our small-scale applications cannot be extrapolate when larger areas are treated.  相似文献   

Efficacy and safety of an infectious bursal disease virus intermediate vaccine in ovo.     

M Coletti  E Del Rossi  M P Franciosini  F Passamonti  G Tacconi  C Marini 《Avian diseases》2001,45(4):1036-1043

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A model estimating the risk of Fusarium head blight on wheat*     

V. Rossi  S. Giosu  E. Pattori  F. Spanna  A. Del Vecchio 《EPPO Bulletin》2003,33(3):421-425

A dynamic simulation model for the risk of Fusarium head blight on wheat was elaborated based on systems analysis. The model calculates a daily infection risk based on sporulation, spore dispersal and infection of host tissue of the four main species causing the disease (Gibberella zeae, Fusarium culmorum, Gibberella avenacea, Monographella nivalis). Spore yield and dispersal are calculated as functions of temperature, rainfall and relative humidity, while the main factors affecting the infection rate are temperature, wetness and the host growth stage. The model also calculates a risk for mycotoxin production by G. zeae and F. culmorum in the infected head tissue. First validations against field data, collected in some wheat‐growing areas in northern Italy and not used in model elaboration, produced satisfactory results.  相似文献   

Evaluation of sampling methods and assessment of the sample size to estimate the weed seedbank in soil, taking into account spatial variability   总被引：1，自引：0，他引：1  

L Ambrosio  L Iglesias†  C Marín  & J P Del Monte‡ 《Weed Research》2004,44(3):224-236

As field sampling is time consuming, it is necessary to develop efficient sampling techniques to obtain accurate estimates of the weed seedbank in soil. The relative efficiency between sampling schemes depends on the spatial variability in weed seed density across agricultural fields. Spatial variability of the weed seed density was characterized by theoretical correlograms. A systematic sampling (square grill) scheme was considered and it was found that, taking into account spatial variability, this sampling scheme was more efficient than simple random sampling. As a result, the sample size can be reduced in comparison with that given in previous studies, where spatial correlation was ignored. The reduction depends on the correlation structure defined as a function of the ratio, τ, between the nugget effect and the sill of the variogram. The maximum reduction of the sample size, without loss of either precision or confidence level corresponds to the case where there is no nugget effect, τ = 0. The opposite extreme case, where the reduction is nil, corresponds to the case of a pure nugget effect τ = 1. The abaci based on given expressions are provided to determine the sample size in species whose spatial pattern can be fitted either to a Poisson or to a negative binomial distribution.  相似文献   

Detection of Cyprinid Herpesvirus 1 DNA in cutaneous squamous cell carcinoma of koi carp (Cyprinus carpio)          下载免费PDF全文

Rubina Sirri  Sara Ciulli  Tim Barbé  Enrico Volpe  Maurizio Lazzari  Valeria Franceschini  Francesca Errani  Giuseppe Sarli  Luciana Mandrioli 《Veterinary dermatology》2018,29(1):60-e24

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A new standard area diagram set for assessment of severity of soybean rust improves accuracy of estimates and optimizes resource use     

Vinicius T. Franceschi  Kaique S. Alves  Sergio M. Mazaro  Cláudia V. Godoy  Henrique S. S. Duarte  Emerson M. Del Ponte 《Plant pathology》2020,69(3):495-505

Soybean rust (SBR), caused by Phakopsora pachyrhizi, is the most important yield-damaging fungal disease of soybean due to severe reduction in healthy leaf area and acceleration of leaf fall. In experimental research, SBR severity is estimated visually aided/trained by a standard area diagram (SAD) developed and validated during the mid-2000s (Old SAD). In this study, we propose a new SAD set for SBR with six true-colour diagrams following linear increments (c. 15% increments) amended with four additional diagrams at low (<10%) severities, totalling 10 diagrams (0.2%, 1%, 3%, 5%, 10%, 25%, 40%, 55%, 70%, and 84%). For evaluation, 37 raters were split into two groups. Each assessed severity in a 50-image sample (0.25%–84%), first unaided and then using either the Old SAD or the New SAD. Accuracy, precision, and reliability of estimates improved significantly relative to unaided estimates only when aided by the New SAD (accuracy >0.95). Low precision (<0.78) and a trend of underestimation with an increase in severity were the main issues with the Old SAD, which did not differ from unaided estimates. Simulation to evaluate the impact of the errors by different methods on hypothesis tests, showed that the new SAD was more powerful for detecting the smallest difference in mean control (e.g., 70% vs. 65% disease reduction) than the Old SAD; the latter required a 2-fold increase in sample size to achieve the same power. There is a need to improve some SADs, taking advantage of new knowledge and technology to increase accuracy of the estimates, and to optimize both resource use efficiency and management decisions.  相似文献   

α-Transducin and α-gustducin immunoreactive cells in the stomach of common sole (Solea solea) fed with mussel meal     

Maurizio Mazzoni  Alessio Bonaldo  Pier Paolo Gatta  Claudia Vallorani  Rocco Latorre  Marco Canova  Paolo Clavenzani 《Fish physiology and biochemistry》2015,41(3):603-612

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Ocular teratoid medulloepithelioma in a northern red-shouldered macaw: case report and literature review     

Jeann Leal de Araújo  Alice C. A. M. Arruda  Nayadjala T. A. Santos  Glenison F. Dias  Thiago F. L. Nery  Fabio Del Piero  Richard Ploeg  Brian F. Porter  Ingeborg M. Langohr 《Journal of veterinary diagnostic investigation》2021,33(3):600

A 4-mo-old northern red-shouldered macaw (Diopsittaca nobilis) was admitted to the veterinary hospital of the Arruda Câmara Zoo, in the State of Paraiba, Brazil, for investigation of an orbital mass. Given rapid progression and lack of response to treatment, the bird was euthanized, and an autopsy was performed. Histologically, the mass consisted of a retrobulbar invasive tumor characterized by tubular and rosette-like structures, with interspersed heteroplastic tissues, such as aggregates of neuroglial cells and islands of hyaline cartilage. The tumor was immunopositive for pancytokeratin, GFAP, NSE, and S100. These findings were compatible with an ocular teratoid medulloepithelioma, a neoplasm best described in humans but also reported rarely in young cockatiels and African Grey parrots.  相似文献   

Socio-spatial organization reveals paternity and low kinship in the Honduran white bat (Ectophylla alba) in Costa Rica     

Edgar G. GUTIÉRREZ  Isabela VIVAS-TORO  Daniela CARMONA-RUÍZ  David VILLALOBOS-CHAVES  Bernal RODRÍGUEZ-HERRERA  Melina Del REAL-MONROY  Gloria LEÓN-AVILA  Jorge ORTEGA 《Integrative zoology》2021,16(5):646-658

Ectophylla alba is a tent-making bat that roosts in mixed-sex clusters comprising adults and offspring. Our goal was to determine the genetic identity of individuals belonging to different roosting groups. We tested the hypothesis of kin selection as a major force structuring group composition. We used 9 microsatellites designed for E. alba to determine the genetic identity and probability of parentage of individuals. We analyzed parentage and kinship using the software ML-Relate, GenAIEx, and Cervus. The obtained relationship probabilities (0.5) revealed a clear maternal relationship between female adults and offspring with allele compatibility, and at least 5 relationships between male adults and pups. We found a low degree of relatedness within roosting groups. Between roosting groups at different sites, the mean probability of a half-sibling relationship ranged from 0.214 to 0.244 and, for full-sibling relationship, from 0.383 to 0.553. Genetically, adult individuals were poorly related within clusters, and kinship as an evolutionary force could not explain group membership.  相似文献   

Effect of Pimobendan in Dogs with Preclinical Myxomatous Mitral Valve Disease and Cardiomegaly: The EPIC Study—A Randomized Clinical Trial          下载免费PDF全文

A. Boswood  J. Häggström  S.G. Gordon  G. Wess  R.L. Stepien  M.A. Oyama  B.W. Keene  J. Bonagura  K.A. MacDonald  M. Patteson  S. Smith  P.R. Fox  K. Sanderson  R. Woolley  V. Szatmári  P. Menaut  W.M. Church  M. L. O'Sullivan  J.‐P. Jaudon  J.‐G. Kresken  J. Rush  K.A. Barrett  S.L. Rosenthal  A.B. Saunders  I. Ljungvall  M. Deinert  E. Bomassi  A.H. Estrada  M.J. Fernandez Del Palacio  N.S. Moise  J.A. Abbott  Y. Fujii  A. Spier  M.W. Luethy  R.A. Santilli  M. Uechi  A. Tidholm  P. Watson 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2016,30(6):1765-1779

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