Entomophthora species infecting pea aphis
Article first published online: 24 APR 2009
1975 The Royal Entomological Society
Transactions of the Royal Entomological Society of London
Volume 127, Issue 2, pages 171–183, July 1975
How to Cite
WILDING, N. (1975), Entomophthora species infecting pea aphis. Transactions of the Royal Entomological Society of London, 127: 171–183. doi: 10.1111/j.1365-2311.1975.tb00566.x
- Issue published online: 24 APR 2009
- Article first published online: 24 APR 2009
- 19th February, 1975
- 1Three species of Entomophthora infected the pea aphis, Acyrthosiphon pisum, on lucerne at Rothamsted Experimental Station, Harpenden, Hertfordshire, between 1967 and 1972 and caused a maximum mortality of 83% in July 1968.
- 2E.thaxteriana, the commonest species, occurred each year and frequently infected aphids during cool weather in spring and autumn. E.aphidis and E.planchoniana were absent in some years and were most common during warm weather in midsummer.
- 3The incidence of infection by the three species was correlated with the density of conidia in the air above the crop, host density and rainfall, but not with any other weather factor considered.
- 4Infection at any time was much more closely related to environmental factors during the preceding 12 than 3 days. The regressions, however, were weak and the relative importance of different environmental factors for the spread of infection can probably only be determined under controlled conditions in the laboratory.