| role of the helper component in vector-specific transmission of potyviruses. | four aphid species were tested for their ability to transmit tobacco etch (tev) and turnip mosaic (tumv) potyviruses. myzus persicae and aphis gossypii transmitted both viruses efficiently from infected plants, whereas lipaphis erysimi transmitted only tumv and myzus ascalonicus was a poor or non-transmitter of either virus. similar electrically monitored probing patterns were produced by m. persicae, l. erysimi and m. ascalonicus, ruling out behavioural differences as the cause of differential ... | 1998 | 9634096 |
| aphid pests of strawberry crops and their parasitoids in france. | the pest status of aphids on strawberry crops has changed with time. they were mainly considered with respect to virus transmission. now, they are rather considered as sap-feeders and honeydew producers. as such, low populations regulated by natural enemies can be tolerated and systematic use of insecticides avoided. a survey of the species present in the different areas of production has been undertaken during 1999 and 2000 in france. during this survey, well known species of the strawberry cro ... | 2001 | 12425050 |
| comparison of gene repertoires and patterns of evolutionary rates in eight aphid species that differ by reproductive mode. | in theory, the loss of sexual reproduction is expected to result in the accumulation of deleterious mutations. in aphids, two main types of life cycle, cyclic and obligate parthenogenesis, represent respectively "sexual" and "asexual" reproductive modes. we used the complete pea aphid genome and previously published expressed sequence tags (ests) from two other aphid species. in addition, we obtained 100,000 new ests from five more species. the final set comprised four sexual and four asexual ap ... | 2012 | 22215803 |
| shallot aphids, myzus ascalonicus, in strawberry: biocontrol potential of three predators and three parasitoids. | the parasitization capacity of 3 parasitoids and the predation capacity of 3 predators towards the shallot aphid, myzus ascalonicus doncaster (homoptera: aphididae), on strawberry, fragaria x ananassa duchesne (rosales: rosaceae) cv. honeoye, were examined in laboratory experiments. in petri dish assays, both aphidius colemani viereck (hymenoptera: aphidiidae) and a. ervi haliday readily stung shallot aphids, with no significant difference in stinging frequency between the two species. a. ervi i ... | 2013 | 24224712 |
| positive effects of an arbuscular mycorrhizal fungus on aphid life history traits. | two generations of two aphid species (myzus ascalonicus and m. persicae) were reared on plantago lanceolata plants, with and without root colonization by the arbuscular mycorrhizal fungus, glomus intraradices. life history traits of the aphids measured were nymphal development time, teneral adult weight, growth rate, total fecundity, adult longevity and duration of post-reproductive life. for both aphids in both generations, mycorrhizal colonization increased aphid weight and fecundity, while ot ... | 1999 | 28308043 |
| myzus ascalonicus, an aphid recently introduced to sub-antarctic islands, prefers native to exotic host-plants. | newly introduced phytophagous insects can affect native and introduced plant species. if the native plant species evolved without undergoing selective pressure from these insects, insect-plant interactions may be different for native and introduced plant species. in particular, this difference may involve mechanisms of plant defense against herbivores. if native plants lack such mechanisms, they may be more palatable to insects than exotic plants. on isolated sub-antarctic islands, native plant ... | 2012 | 23321085 |
| the shallot aphis, myzus ascalonicus doncaster, and its behaviour as a vector of plant viruses. | | 1946 | 20997939 |