| molecular analysis of ribosomal dna from the aphid amphorophora idaei and an associated fungal organism. | the ribosomal dna cistron from the large raspberry aphid, amphorophora idaei (hemiptera: aphididae), has been mapped by restriction analysis. the results showed that the map of a. idaei was similar to those of the previously characterized aphids schizaphis graminum and acyrthosiphon pisum. an extra bgl ii site was found in some of the ribosomal dna intergenic spacer repeats in a. idaei. using in-situ hybridization to aphid mitotic chromosomes it was demonstrated that probes derived from this reg ... | 1994 | 7894750 |
| identification, characterization, and detection of black raspberry necrosis virus. | abstract a serious disease was observed in black raspberry (rubus occidentalis) in oregon in the last decade. plants showing mosaic symptoms declined rapidly and, in many cases, died after several years. double-stranded rna extraction from symptomatic black raspberry revealed the presence of two high molecular weight bands which were cloned and sequenced. sequence analysis disclosed the presence of a novel virus that was tentatively named black raspberry decline-associated virus (brdav). the com ... | 2007 | 18942935 |
| elevated atmospheric co2 impairs aphid escape responses to predators and conspecific alarm signals. | research into the impact of atmospheric change on predator-prey interactions has mainly focused on density dependent responses and trophic linkages. as yet, the chemical ecology underpinning predator-prey interactions has received little attention in environmental change research. group living animals have evolved behavioral mechanisms to escape predation, including chemical alarm signalling. chemical alarm signalling between conspecific prey could be susceptible to environmental change if the p ... | 2014 | 25273846 |
| reciprocal feeding facilitation between above- and below-ground herbivores. | interspecific interactions between insect herbivores predominantly involve asymmetric competition. by contrast, facilitation, whereby herbivory by one insect benefits another via induced plant susceptibility, is uncommon. positive reciprocal interactions between insect herbivores are even rarer. here, we reveal a novel case of reciprocal feeding facilitation between above-ground aphids (amphorophora idaei) and root-feeding vine weevil larvae (otiorhynchus sulcatus), attacking red raspberry (rubu ... | 2013 | 23883576 |
| mapping of a1 conferring resistance to the aphid amphorophora idaei and dw (dwarfing habit) in red raspberry (rubus idaeus l.) using aflp and microsatellite markers. | raspberry breeding programmes worldwide aim to produce improved cultivars to satisfy market demands and within these programmes there are many targets, including increased fruit quality, yield and season, and improved pest and disease resistance and plant habit. the large raspberry aphid, amphorophora idaei, transmits four viruses and vector resistance is an objective in raspberry breeding. the development of molecular tools that discriminate between aphid resistance genes from different sources ... | 2007 | 17374159 |
| ribosomal spacer length variability in the large raspberry aphid, amphorophora idaei (aphidinae: macrosiphini). | the large raspberry aphid, amphorophora idaei, has several biotypes described by their abilities to overcome plant resistance genes. bioassays of field populations showed a strong shift towards a1 resistance-breaking biotypes since the 1960s. rflp analysis of the rdna cistron was used to study variation found within and between standard clones of three a. idaei biotypes and twenty-nine field populations collected over 3 years. probing genomic dna with the ribosomal dna probe pbg 35 produced cons ... | 1994 | 7704307 |
| root herbivores drive changes to plant primary chemistry, but root loss is mitigated under elevated atmospheric co2. | above- and belowground herbivory represents a major challenge to crop productivity and sustainable agriculture worldwide. how this threat from multiple herbivore pests will change under anthropogenic climate change, via altered trophic interactions and plant response traits, is key to understanding future crop resistance to herbivory. in this study, we hypothesized that atmospheric carbon enrichment would increase the amount (biomass) and quality (c:n ratio) of crop plant resources for above- an ... | 2016 | 27379129 |
| transmission biology of raspberry latent virus, the first aphid-borne reovirus. | raspberry latent virus (rplv) is a newly characterized reovirus found in commercial raspberry fields in the pacific northwest (pnw). thus far, all members of the plant reoviruses are transmitted in a replicative, persistent manner by several species of leafhoppers or planthoppers. after several failed attempts to transmit rplv using leafhoppers, the large raspberry aphid, commonly found in the pnw, was tested as a vector of the virus. the virus was transmitted to new, healthy raspberry plants wh ... | 2012 | 22352304 |