References
- Banks , C. J. 1954 . A method of estimating populations of Aphis fabae Scopoli . Bull. ent. Res. , 45 : 751 – 756 .
- Hughes , R. D. 1962 . A method for estimating the effects of mortality on aphid populations . J. Anim. Ecol. , 31 : 389 – 396 .
- Lowe , A. D. and Dromgoole , W. V. 1958 . The development of an electronic aphid counter . N.Z. J. agric. Res. , 1 : 903 – 912 .
- Strickland , A. H. 1957 . Cabbage aphid assessment and damage in England and Wales 1946–55 . Plant Path. , 6 : 1 – 9 .