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T. Shepherd ; G. Robertson ; D. Griffiths ; A. Birch | 1999Epicuticular waxes from the aphid-resistant red raspberry (Rubus idaeus) cultivar Autumn Bliss and the aphid-susceptible cultivar Malling Jewel were collected from the newly emerging crown leaves, and also from the group of four more mature leav[...]article/chapitre/communication
T. Shepherd ; G. Robertson ; D. Griffiths ; A. Birch | 1999article/chapitre/communication
T. Paul ; P. Darby ; C. Green ; C. Hodgson ; J. Rossiter | 1996Electrical penetration graphs (EPG's) were used to locate resistance to Phorodon humuli (Schrank) (Homoptera, Aphididae) in hops (Humulus lupulus, Cannabinaceae). Aphids on those hops showing resistance had a much reduced E2 pattern (uptake of p[...]article/chapitre/communication
I. Annan ; W. Tingey ; G. Schaefers | 1997Survivorship, growth, and reproductive performance of cowpea aphid, aphis craccivora Koch, were studied on whole plants and excised plant tissues of aphid-resistant ('ICV-12') and aphid-susceptible ('ICV-1') cultivars of cowpea, Vigna unguiculat[...]article/chapitre/communication
Variation in aphid alarm pheromone content among glandular and eglandular-haired Medicago accessions
R. Mostafavi ; J. Henning ; J. Gardeatorresday ; I. Ray | 1996Pea (Acyrthosiphon pisum Harris) and blue alfalfa aphid (A. kondoi Shinji) deterrency in alfalfa (Medicago sativa L.) may result from incorporating higher levels of the aphid alarm pheromone, (E)-beta-farnesene relative to (E)-beta-caryophyllene[...]article/chapitre/communication
A. Givovich ; J. Sandstrom ; H. Niemeyer ; J. Pettersson | 1994Phloem sap of wheat seedlings differing in whole leaf hydroxamic acid (Hx) concentrations was collected by cutting stylets of feeding aphids. DIMBOA-glucoside was the only Hx-related product found. Concentration of DIMBOA-glucoside in phloem sap[...]