Reports on grass-endophyte-insect interactions show that the expression of insect resistance is affected by the host grass genotype or species (tall fescue, perennial ryegrass, wild barley) and the Neotyphodium fungal endophyte species or strain involved in the interaction. This phenomenon is demonstrated in this poster via the results of new experiments in which rose grass aphid resistance varied with the species of wild barley and Neotyphodium strain involved. Other experiments linked Neotyphodium infection in wild barley to Hessian fly resistance, but not to bird cherry-oat aphid. Thus, fungal endophytes confer resistance to some but not all insect associates of infected wild barley.
Species 1: Homoptera Aphididae Metopolophium dirhodum (Rose grass aphid)
Species 2: Homoptera Aphididae Rhopalosiphum padi (Bird cherry oat aphid)
Species 3: Diptera Cecidomyiidae Mayetiola destructor (Hessian fly)
Keywords: Plant microbes, Plant resistance
Back to Display Presentations, Section Fa. Host Plant Resistance
Back to Posters
Back to The 2003 ESA Annual Meeting and Exhibition