Ação de produtos naturais sobre a sobrevivência de Argyrotaenia sphaleropa (Meyrick) (Lepidoptera: Tortricidae) e seletividade de inseticidas utilizados na produção orgância de videira sobre Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae).

Nesse trabalho,foi estudado o efeito de formulações comerciais de inseticidas, com ênfase para os produtos permitidos na produção orgânica (nim. piretro natural e extrato pirolenhoso) para o controle de Argyrotaenia sph aleropu (Meyrick) (Lepidoptera: Torlricidae) e sua atuação sobre o parasitóide de ovos Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae), em laboratório. Os inseticidas Natuneem" (l500ppm de Azadirachta indica por litro) e o extrato pirolenhoso (Biopirol 7 M'), nas dosagens de 250 e 500mL 100L". não foram eficientes no controle de A. sphaleropa quando aplicados sobre folhas de videira (Vitis sp.) cultivar "Chardonnay ", enquanto que o piretro natural (250 e 500mL 100[-/) resultou em mortalidade significativa de 77,65 e 85,88% dos insetos, respectivamente, 120 horas após a aplicação. O efeito secundário foi avaliado sobre adultos do porasitàide de ovos T. pretiosum, seguindo a metodologia da International Organization for Biological and Integrated Control (IOBC). Os inseticidas Natuneem" (500mL 100L"), Biopirol 7 M' (500mL 100U) e Dipel DF' (IOOg 100L") foram inócuos «30% de redução no parasitismo por T. pretiosum), enquanto o piretro natural, nas dosagens de 250l1/L 100[-' e 500l1/L 100 L', foi classificado como moderadamente nocivo (80-99% de redução no parasitismo) e nocivo (>99% de redução no parasitismo). respectivamente, equivalendo-se ao efeito do fosforado Lebaycid 500~ (lOOmL 100 L"). Palavras-chave: inseticidas orgânicos, uva, efeito secundário, parasitoide de ovos. This work was conducted to study lhe effect of commercial formulations of insecticides with emphasis on that allowed in lhe organic production (neem, natural piretro and pirolenhoso extract) 10 control Argyrotaenia sph aleropu (Meyrick) (Lepidoptera: Tortricidae) and their performance on the egg parasitoid Trichogramma pretiosum Riley (Hymenoptera: Trichogrammaiidae) adults. The insecticides Natuneem® (l500ppm of azadirachtin L") and the pirolenhoso extract (Biopirol 7 M') (250 and 500mL 100L'/) lVere not efficienl in the control of A. sphuleropo when applied over grapevine leaves (Vitis sp.) cultivate Chardonnay. Natural piretro (250 and 500mL 100L") resulted in a mortality of 77.65 and 85.88% of insects, respectively 120 hours after application. The secondary effect of insecticides allowed was evaluated on adults of the egg parasitoid T. pretiosum following lnternational Organization for Biological and l ntegrated Control (IOBC) methodology. II \vas observed that Natuneem" (500mL 100U). Biopirol 7 M' (500mL 100[-') and Dipel DF' (lOOg 100L") had been innocuous «30% parasitism reduction) wh ile natural piretro (250mL 100L") was c/assified as moderately harmful (80-99% of parasitism reduction). Natural piretro in lhe higher dose (500mL 100[-') showed a parasitism reduction in more than 99% in lhe same way that lhe pattern Lebaycid 500' (lOOmL 100 L"). Key words: organic inseclicides, grape, secondary effects, egg parasitoid.bitstream/item/200089/1/7879-2006-p.1072-1078.pd

Inclusive Search for Anomalous Production of High-pT Like-Sign Lepton Pairs in Proton-Antiproton Collisions at sqrt{s}=1.8 TeV

We report on a search for anomalous production of events with at least two charged, isolated, like-sign leptons with pT > 11 GeV/c using a 107 pb^-1 sample of 1.8 TeV ppbar collisions collected by the CDF detector. We define a signal region containing low background from Standard Model processes. To avoid bias, we fix the final cuts before examining the event yield in the signal region using control regions to test the Monte Carlo predictions. We observe no events in the signal region, consistent with an expectation of 0.63^(+0.84)_(-0.07) events. We present 95% confidence level limits on new physics processes in both a signature-based context as well as within a representative minimal supergravity (tanbeta = 3) model.Comment: 15 pages, 4 figures. Minor textual changes, cosmetic improvements to figures and updated and expanded reference

Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt(s) = 1.96 TeV

We present a measurement of the top quark pair production cross section in ppbar collisions at sqrt(s)=1.96 TeV using 318 pb^{-1} of data collected with the Collider Detector at Fermilab. We select ttbar decays into the final states e nu + jets and mu nu + jets, in which at least one b quark from the t-quark decays is identified using a secondary vertex-finding algorithm. Assuming a top quark mass of 178 GeV/c^2, we measure a cross section of 8.7 +-0.9 (stat) +1.1-0.9 (syst) pb. We also report the first observation of ttbar with significance greater than 5 sigma in the subsample in which both b quarks are identified, corresponding to a cross section of 10.1 +1.6-1.4(stat)+2.0-1.3 (syst) pb.Comment: Accepted for publication in Physics Review Letters, 7 page

Search for Long-lived Charged Massive Particles in anti-p p Collisions at s**1/2 = 1.8 TeV

We report a search for production of long-lived charged massive particles in a data sample of 90 pb^{-1} of \sqrt{s} = 1.8 TeV p anti-p collisions recorded by the Collider Detector at Fermilab (CDF). The search uses the muon-like penetration and anomalously high ionization energy loss signature expected for such a particle to discriminate it from backgrounds. The data is found to agree with background expectations, and cross section limits of \cal{O} (1) pb are derived using two reference models, a stable quark and a stable scalar lepton.Comment: 14 pages, 3 figure

Evidence for the exclusive decay Bc+- to J/psi pi+- and measurement of the mass of the Bc meson

We report first evidence for a fully reconstructed decay mode of the B_c^{\pm} meson in the channel B_c^{\pm} \to J/psi \pi^{\pm}, with J/psi \to mu^+mu^-. The analysis is based on an integrated luminosity of 360 pb$^{-1} in p\bar{p} collisions at 1.96 TeV center of mass energy collected by the Collider Detector at Fermilab. We observe 14.6 \pm 4.6 signal events with a background of 7.1 \pm 0.9 events, and a fit to the J/psi pi^{\pm} mass spectrum yields a B_c^{\pm} mass of 6285.7 \pm 5.3(stat) \pm 1.2(syst) MeV/c^2. The probability of a peak of this magnitude occurring by random fluctuation in the search region is estimated as 0.012%.Comment: 7 pages, 3 figures. Version 3, accepted by PR

Measurement of WγW\gamma and ZγZ\gamma Production in ppˉp\bar{p} Collisions at s\sqrt{s} = 1.96 TeV

The Standard Model predictions for $W\gamma$ and $Z\gamma$ production are tested using an integrated luminosity of 200 pb$^{-1}$ of \ppbar collision data collected at the Collider Detector at Fermilab. The cross sections are measured selecting leptonic decays of the $W$ and $Z$ bosons, and photons with transverse energy $E_T>7$ GeV that are well separated from leptons. The production cross sections and kinematic distributions for the $W\gamma$ and $Z\gamma$ are compared to SM predictions.Comment: 7 pages, 4 figures, submitted to PR

Top quark mass measurement using the template method at CDF

We present a measurement of the top quark mass in the lepton+jets and dilepton channels of $t\bar{t}$ decays using the template method. The data sample corresponds to an integrated luminosity of 5.6 fb$^{-1}$ of $p\bar{p}$ collisions at Tevatron with $\sqrt{s}=1.96$ TeV, collected with the CDF II detector. The measurement is performed by constructing templates of three kinematic variables in the lepton+jets and two kinematic variables in the dilepton channel. The variables are two reconstructed top quark masses from different jets-to-quarks combinations and the invariant mass of two jets from the $W$ decay in the lepton+jets channel, and a reconstructed top quark mass and $m_{T2}$, a variable related to the transverse mass in events with two missing particles, in the dilepton channel. The simultaneous fit of the templates from signal and background events in the lepton+jets and dilepton channels to the data yields a measured top quark mass of $M_{top} = 172.1 \pm 1.1(stat) \pm 0.9(syst).$Comment: submitted to Phys. Rev.

Measurement of the Lifetime Difference Between B_s Mass Eigenstates

We present measurements of the lifetimes and polarization amplitudes for B_s --> J/psi phi and B_d --> J/psi K*0 decays. Lifetimes of the heavy (H) and light (L) mass eigenstates in the B_s system are separately measured for the first time by determining the relative contributions of amplitudes with definite CP as a function of the decay time. Using 203 +/- 15 B_s decays, we obtain tau_L = (1.05 +{0.16}/-{0.13} +/- 0.02) ps and tau_H = (2.07 +{0.58}/-{0.46} +/- 0.03) ps. Expressed in terms of the difference DeltaGamma_s and average Gamma_s, of the decay rates of the two eigenstates, the results are DeltaGamma_s/Gamma_s = (65 +{25}/-{33} +/- 1)%, and DeltaGamma_s = (0.47 +{0.19}/-{0.24} +/- 0.01) inverse ps.Comment: 8 pages, 3 figures, 2 tables; as published in Physical Review Letters on 16 March 2005; revisions are for length and typesetting only, no changes in results or conclusion