Rachel E. Down
Food and Environment Research Agency
29 Papers
291 Citations
Rachel E. Down is an academic researcher from Food and Environment Research Agency. The author has contributed to research in topics: Aphid & Biology. The author has an hindex of 19, co-authored 28 publications. Previous affiliations of Rachel E. Down include Durham University & Central Science Laboratory.
Chat about Author
Papers
Expression of the insecticidal lectin from snowdrop (Galanthus nivalis agglutinin; GNA) in transgenic wheat plants: effects on predation by the grain aphid Sitobion avenae.
TL;DR: It is proposed that transgenic approaches using insecticidal genes such as gna in combination with integrated pest management present promising opportunities for the control of damaging wheat pests.
223
Insecticidal spider venom toxin fused to snowdrop lectin is toxic to the peach-potato aphid, Myzus persicae (Hemiptera: Aphididae) and the rice brown planthopper, Nilaparvata lugens (Hemiptera: Delphacidae).
Rachel E. Down,Elaine Fitches,Duncan P Wiles,Paola Corti,Howard A. Bell,John A. Gatehouse,John P. Edwards +6 more
TL;DR: The SFI1/GNA fusion protein, comprising of snowdrop lectin fused to an insecticidal spider venom neurotoxin, was tested for toxicity against the rice brown planthopper Nilaparvata lugens and the peach-potato aphid Myzus persicae by incorporation into artificial diets.
83
The effect of snowdrop lectin (GNA) delivered via artificial diet and transgenic plants on Eulophus pennicornis (Hymenoptera: Eulophidae), a parasitoid of the tomato moth Lacanobia oleracea (Lepidoptera: Noctuidae).
Howard A. Bell,Elaine Fitches,Rachel E. Down,G. C. Marris,John P. Edwards,John A. Gatehouse,Angharad M. R. Gatehouse +6 more
TL;DR: The results suggest that expression of GNA in transgenic crops to confer resistance to lepidopteran pests will not adversely affect the ability of the ectoparasitoid E. pennicornis to utilise the pest species as a host.
82
Effect of dietary cowpea trypsin inhibitor (CpTI) on the growth and development of the tomato moth Lacanobia oleracea (Lepidoptera: Noctuidae) and on the success of the gregarious ectoparasitoid Eulophus pennicornis (Hymenoptera: Eulophidae)
Howard A. Bell,Elaine Fitches,Rachel E. Down,Louise Ford,John P. Edwards,John A. Gatehouse,Angharad M. R. Gatehouse +6 more
TL;DR: While expression of CpTI in transgenic potato plants confers resistance to the lepidopterous pest L oleracea, adverse effects on the ability of the ectoparasitoid E pennicornis to parasitise this moth species successfully may also occur.
75
Snowdrop lectin (GNA) has no acute toxic effects on a beneficial insect predator, the 2-spot ladybird (Adalia bipunctata L.).
Rachel E. Down,Louise Ford,Stephen D. Woodhouse,Romaan J.M. Raemaekers,Beulah Leitch,John A. Gatehouse,Angharad M. R. Gatehouse +6 more
TL;DR: It is hypothesised that GNA does not have significant direct toxic or adverse effects on developing ladybird larvae, but that the effects observed may be due to the fact that the aphids fed on GNA are compromised and are thus a suboptimal food.
69