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118 recherche sur le mot-clé 'RHOPALOSIPHUM PADI'
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article/chapitre/communication
J. Weibull | 1994The phloem sap content of glutamic acid was determined in EDTA leaf exudate samples from a collection of Hordeum vulgare subsp. spontaneum previously screened for Rhopalosiphum padi resistance. Segregating populations of crosses between subsp. s[...]article/chapitre/communication
article/chapitre/communication
M. Hullé ; D. Maurice ; C. Rispe ; J. Simon | 1999article/chapitre/communication
K. Ponder ; J. Pritchard ; R. Harrington ; J. Bale | 2000Effects of nitrogen deficiency in hydroponically grown barley seedlings (Hordeum vulgare L.) on the development and reproduction of the aphid Rhopalosiphum padi (L.) (Hemiptera: Aphididae) were investigated. Plant growth was significantly reduce[...]article/chapitre/communication
R. Glinwood ; J. Pettersson | 1999thèse/mémoire
article/chapitre/communication
C. Rispe ; M. Hullé ; J. Gauthier ; J. Pierre ; R. Harrington | 1998article/chapitre/communication
G. Zuniga ; L. Corcuera | 1986article/chapitre/communication
L. Hansen | 2000In Denmark, farmers are recommended to spray against aphids in spring barley fields at very low densities. Moreover, about 50% of the spring barley fields are treated with insecticides annually, when only about 25% need this control. In order to[...]article/chapitre/communication
C. Rispe ; J. Bonhomme ; J. Simon | 1999article/chapitre/communication
K. Ponder ; J. Pritchard ; R. Harrington ; J. Bale | 2001Electrical penetration graphs (EPGs) were used to examine the probing behaviour of adult apterous Rhopalosiphum padi (Linnaeus) on barley seedlings grown under conditions of nitrogen or water stress. Aphids took significantly longer to reach and[...]article/chapitre/communication
This study aimed at evaluating the intrinsic rate of increase (r(m)) of clones of the cereal aphid Rhopalosiphum padi (L.) that differ in their ability to produce sexuals. The value of r(m) was measured for wingless parthenogenetic females in ex[...]article/chapitre/communication
J. Simon ; E. Carrel ; P. Hebert ; C. Dedryver ; J. Bonhomme ; J. Le Gallic | 1996article/chapitre/communication
D. Martineztorres ; A. Moya ; P. Hebert ; J. Simon | 1997This study examines the spatial and seasonal patterning of mitochondrial DNA diversity in French populations of the bird cherry-oat aphid, Rhopalosiphum padi (Linnaeus), on both its primary and secondary hosts. Our results confirm the presence o[...]