Effet des insecticides, des variétés de chou et des dates de semis sur Plutella xylostella (L.) (Lepidoptera : Plutellidae) dans les hautes terres de l’Ouest Cameroun

Le but de ce travail a été d’étudier l’effet des insecticides, des variétés de chou et des dates de semis sur la teigne du chou à Dschang. Bacillus thuringiensis a été pulvérisé sur le chou pour contrôler les insectes. Deux insecticides conventionnels (Cyperdim 220 EC et Cypercal 100 EC) ont été utilisés comme produits comparatifs. Les variétés chou, Green Coronet et Marché de Copenhague ont été testées. Le dispositif expérimental a été en blocs aléatoires complets avec quatre répétitions. Le comptage direct des insectes a été fait hebdomadairement jusqu’à deux semaines avant la récolte. L’abondance des insectes, les dégâts, les rendements et les pertes ont été évalués. Les dégâts moyens et les pertes moyennes en 2008 ont été moins importants avec Biobit que Cyperdim et Cypercal. Le nombre de teigne en 2008 (247,5) a été plus important qu’en 2009 (2,6). Green Coronet a hébergé plus de teigne (182,6) que Marché de Copenhague (67,5). Mais son rendement moyen (96,58 t/ha) a été significativement plus élevé que celui de Marché de Copenhague (67,15 t/ha). Biobit a été efficace comme insecticide. Green Coronet est tolérante. Son usage peut être combiné avec l’application de Biobit en période de forte infestation de la teigne à Dschang.Mots clés: Chou, Biobit, teigne du chou, lutte intégrée, Cypercal 100EC, Cyperdim 220EC

Boston University Wind Ensemble, December 6, 1994

This is the concert program of the Boston University Wind Ensemble performance on Tuesday, December 6, 1994 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue, Boston, Massachusetts. Works performed were March, Op. 99 by Sergei Prokofiev, Colors and Contours by Leslie Bassett, Serenade in E-flat major, Op. 7 by Richard Strauss, After a Gentle Rain by Anthony Iannaconne, "Elsa's Procession to the Cathedral," from Lohengrin by Richard Wagner, Heroes, Lost and Fallen by David Gillingham, and Resonances I by Ron Nelson. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Faculty Recital: Aldo Abreu, December 10, 2014

This is the concert program of the Faculty Recital: Aldo Abreu performance on Wenesday, December 10, 2014 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue, Boston, Massachusetts. Works performed were Organ Trio Sonata BWV 525 in G Major by Johann Sebastian Bach, Sweet, for alto recorder by Louis Andriessen, CREUBEN for solo recorder and guitar by Melika Fitzhugh, Trio Sonata in C major for recorder, flute and continuo by Johann Joachim Quantz, Trio for recorder, flute and harpsichord by Hans Martin Linde, Sonata in C Major by Pietro Torri, Serenade No. 2 for alto recorder, harpsichord and cello by Larry Thomas Bell, and Sonata a tre in C Major by Georg Philipp Telemann. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Motion systems providing three or four degrees of freedom

A motion system is provided by a platform generally parallel to a base and connected thereto by a column and powered and controlled extensible members, at least three of which are connected between distributed points around the column. In a three degree of freedom device, the column is conical, rigidly supported at its base with a universal joint at its top. The points of attachment define triangles in the base and in the platform surrounding the column with one extensible member connected between each. In the four degree of freedom version, the column is modified by making it effectively a column which is pivoted or guided at the base or contains an extensible member, preferably retains its triangular shape and its universal joint connection to the platform at its apex. For stability four powered and controlled extensible members are provided between points in the base and platform distributed around the column, a preferred pattern of arrangement being a square with the column at the center

Ebenbild / Image, October 4, 2014

This is the concert program of the Ebenbild / Image performance on Saturday, October 4, 2014 at 8:00 p.m., at the Boston University Concert Hall, 855 Commonwealth Avenue, Boston, Massachusetts. Works performed were Locken by Robin Hoffmann, Ebenbild by Richard Beaudoin, Cells by Hanspeter Kyburz, and La Profondeu by Georg Friedrich Haas. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Muir String Quartet

This is the concert program of the Muir String Quartet performance on Monday, January 26, 2015 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue. Works performed were String Quartet in C major, K. 465 by Wolfgang Amadeus Mozart, String Quartet No. 1, "Kreutzer Sonata" by Leoš Janáček, and String Quartet in G minor, Op. 10 by Claude Debussy. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Boston University Chamber Orchestra, September 29, 2014

This is the concert program of the Boston University Chamber Orchestra performance on Monday, September 29, 2014 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue, Boston, Massachusetts. Works performed were Overture, Scherzo, and Finale, op. 52 by Robert Schumann, Ningaloo by Richard Cornell, and Pictures at an Exhibition by Modest Mussorgsky. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Ensemble in Residence: Muir String Quartet, January 29, 2014

This is the concert program of the Ensemble in Residence: Muir String Quartet performance on Wednesday, January 29, 2014 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue, Boston, Massachusetts. Works performed were String Quartet No. 3 in C major "The Bird" by Joseph Haydn, String Quartet in A minor by Fritz Kreisler, and String Quartet by Maurice Ravel. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Boston University Wind Ensemble, November 20, 2013

This is the concert program of the Boston University Wind Ensemble performance on Wednesday, November 20, 2013 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue, Boston, Massachusetts. Works performed were Portrait of Freedom by Steven Reineke, Serenade in Eb Major, opus 7 by Richard Strauss, Tuba Concerto by John Williams, Symphony for Band by Vincent Persichetti, and Resplendent Glory by Rossano Galante. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Boston University All-Campus Orchestra, March 5, 2013

This is the concert program of the Boston University All-Campus Orchestra performance on Tuesday, March 5, 2013 at 8:00 p.m., at the Boston University Concert Hall, 855 Commonwealth Avenue, Boston, Massachusetts. Works performed were Valse Triste by Jean Sibelius, and Symphony No.1 in C Major, op. 21 by Ludwig van Beethoven. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund