Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-22T18:35:43.511Z Has data issue: false hasContentIssue false
  • English
  • Français

Seasonal fluctuations of a natural population of Diclidophlebia eastopi Vondrácek and D. harrisoni Osisanya (Homoptera, Psyllidae)

Published online by Cambridge University Press:  10 July 2009

E. O. Osisanya
E. O. Osisanya
Affiliation:
Department of Agricultural Biology, University of Ibadan, Ibadan, Nigeria
Get access Rights & Permissions [Opens in a new window]

Abstract

Nymph and adult populations of Diclidophlebia eastopi Vondráček and D. harrisoni Osisanya were counted weekly on 3- or 4-year-old trees, Triplochiton scleroxylon, in Nigeria during 1966–71. D. eastopi showed successively larger peaks in late January or early February, mid-August, and early or mid-September; the smallest populations were in mid or late March. D. harrisoni showed peaks in February, late July or early August, and late October or early November, the second peak being the largest. Multiple regression analysis of Diclidophlebia populations against rainfall, saturation deficit, temperature and time showed that temperature had the greatest, although slight, effect on D. eastopi, while saturation deficit, through the host-plant, had a marked effect on D. harrisoni. D. harrisoni populations were dependent on the availability of young leaves. It is concluded that, to avoid attack by Diclidophlebia, transplanting of Triplochiton seedlings should be in late February or early March.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 64 , Issue 2 , October 1974 , pp. 289 - 296
Copyright
Copyright © Cambridge University Press 1974

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

Cochran, W. G. (1938). Some difficulties in the statistical analysis of replicated experiments.—Emp. J. expl Agric. 6, 157–175.Google Scholar
Davidson, J. & Andrewartha, H. G. (1948). Annual trends in a natural population of Thrips imaginis (Thysanoptera).—J. Anim. Ecol. 17, 193–199.CrossRefGoogle Scholar
Osisanya, E. O. (1969 a). A new species of Diclidophlebia (Homoptera: Psyllidae) from Nigeria.—J. nat. Hist. 3, 71–77.CrossRefGoogle Scholar
Osisanya, E. O. (1969 b). The effect of attack of Diclidophlebia eastopi (Vond.) (Homoptera; Psyllidae) on the survival of Triplochiton scleroxylon (K. Schum).—Nigerian Entomol. Mag. 2, 19–25.Google Scholar
Osisanya, E. O. (1970). Effect of shade on the rate of infestation of Triplochiton scleroxylon by Diclidophlebia species.—Entomologia exp. appl. 13, 125–132.CrossRefGoogle Scholar
Osisanya, E. O. (1974). Aspects of the biology of Diclidophlebia eastopi Vondracek and D. harrisoni Osisanya (Homoptera, Psyllidae).—Bull. ent. Res. 64, 9–17.CrossRefGoogle Scholar
Vondráček, K. (1963). Diclidophlebia eastopi sp. n.—a remarkable Psyllid from West Africa.—Ann. Mag. nat. Hist. (13) 6, 289–295.CrossRefGoogle Scholar
Williams, C. B. (1951). Comparing the efficiency of insect traps.—Bull. ent. Res. 42, 513–517.CrossRefGoogle Scholar