Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-26T16:28:31.856Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of bush Clearance on Flighting of West African Anophelines

Published online by Cambridge University Press:  10 July 2009

C. R. Ribbands
Get access Rights & Permissions [Opens in a new window]

Extract

1. Two huts were selected which were surrounded by dense bush, which varied in height from 4 to 15 feet. After elimination of this bush within a radius of 140 yards from these huts, the proportion of the population of ♀ A. funestus and ♀ A. gambiae attracted to them was at least 90 per cent. of the proportion which reached them before the bush clearance. This result indicates that bush clearance is not a justifiable measure for reducing Anopheline infestation. Even the male Anophelines entered the cleared area in the same proportion as they did before clearance.

2. While bush clearance was in progress there was a temporary sharp reduction in the infestation, and the proportion of the female Anopheline population attracted declined to between one-third and one-quarter of the proportion attracted before clearance. The proportion of males dropped by one-half. At the same time the ♀ Anophelines were apparently much less able to discriminate between quantitative olfactory stimuli. Both effects are attributed to masking by an obscuring odour from the cut and withering bush.

3. There was no difference between the numbers of A. melas attracted to a hut screened by a 10 yard thick belt of dense high bush and the numbers attracted to an identical hut in the adjacent clearing 25 yards away.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 37 , Issue 1 , June 1946 , pp. 33 - 41
Copyright
Copyright © Cambridge University Press 1946

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

De Meillon, B. (1937). Studies on insects of medical importance from Southern Africa and adjacent territories (Part IV).—Publ. S. Afr. Inst. med. Res., 40, pp. 301–411.Google Scholar
Evans, A. M. (1938). Mosquitoes of the Ethiopian Region II. Anophelini. Brit. Mus. (Nat. Hist.).Google Scholar
Gibbins, E. G. (1933). The domestic Anopheles mosquitos of Uganda.—Ann. trop. Med. Parasit., 27, pp. 15–25.CrossRefGoogle Scholar
Hackett, L. W., Russell, P. F., Scharff, J. W. & Senior white, R. (1938). The present use of naturalistic measures in the control of malaria.—Bull. Hlth Org. L.o.N., 7, pp. 1016–1064.Google Scholar
Ribbands, C. R. (1944 a). Camp-siting in malarious districts of West Africa.—J. R. Army med. Cps. 82, pp. 157–164.Google Scholar
Ribbands, C. R. (1944 b). The influence of rainfall, tides and periodic fluctuations on a population of Anopheles melas.—Bull. ent. Res., 35, pp. 271–295.CrossRefGoogle Scholar
Ribbands, C. R. (1946). Moonlight and house-haunting habits of female Anophelines in West Africa.—Bull. ent. Res., 36, pp. 395–417.CrossRefGoogle ScholarPubMed