Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-13T05:02:02.112Z Has data issue: false hasContentIssue false
  • English
  • Français

A comparison of the susceptibility of the rice varieties, IR8 and Warangal 1263, to attack by the gall midge, Pachydiplosis oryzae (Wood-Mason)(Dipt., Cecidomyiidae)

Published online by Cambridge University Press:  10 July 2009

W. W. D. Modder  and
A. Alagoda
W. W. D. Modder
Affiliation:
Department of Zoology, University of Ceylon, Peradeniya, Ceylon
A. Alagoda
Affiliation:
Department of Zoology, University of Ceylon, Peradeniya, Ceylon
Get access Rights & Permissions [Opens in a new window]

Extract

Daily observations were made of the developmental stages of Pachydiplosis oryzae (Wood-Mason) on laboratory-infested IR8 and W1263 rice seedlings at Peradeniya, Ceylon. The previously observed resistance of W1263 was attributed to the inhibition of moulting of first-instar larvae in 40% of the terminal shoot apices. In comparisons of the two varieties, differences in the following parameters were not significant or of no importance: the numbers of P. oryzae eggs laid and their hatching time, the mortality rates of the developmental stages, the number, body length and activity of the larvae and pupae at the terminal apices, and gall length.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 61 , Issue 4 , June 1972 , pp. 745 - 753
Copyright
Copyright © Cambridge University Press 1972

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Indian Council Of Agricultural Research (1969). All India coordinated rice improvement project, progress report, vol. 3.—224 pp. New Delhi, ICAR.Google Scholar
Dempster, J.P. (1956). The estimation of the number of individuals entering each stage during the development of one generation of an insect population.—J. Anim. Ecol. 25, 1–5.CrossRefGoogle Scholar
Fernando, H.E. (1969). Report on studies on the rice gall midge Pachydiplosis oryzae (Wood Mason) in Ceylon.—Unpublishedpaper presesited to the International Rice Conference,International Rice Research Institute,Philippines.Google Scholar
Novak, V. J. A. (1966). Insect hormones.—478 pp. London, Methuen.Google Scholar
Perera, N. & Fernando, H.E. (1970). Infestation of young rice plants by the rice gall midge, Pachydiplosis oryzae (Wood-Mason) (Dipt., Cecidomyiidae), with special reference to shoot morphogenesis.—Bull. ent. Res. 59, 605–613.Google Scholar
Southwood, T.R.E. (1966). Ecological methods with particular reference to the study of insect populations.—391 pp. London, Methuen.Google Scholar