Browsing by Author "Baldry, D.A.T."
Now showing 1 - 5 of 5
- Results Per Page
- Sort Options
Item Lantana camara L. as a Breeding Site for Glossina tachinoides Westwood in South-Eastern Nigeria(1966) Baldry, D.A.T.; Nigerian Institute For trypanosomiasis Research, Kadunahis publication contains the text of papers submitted to this eleventh meeting of a series [cf. RAE B 54, 165, etc.], and the following are notices of those that deal with Glossina and with the transmission of sleeping sickness or animal trypanosomiasis. In southern Nigeria, G. tachinoides Westw. has been found in farmland and villages and round cattle camps [cf. 53 81] far from its riverine habitat and is responsible for a high incidence of trypanosomiasis in pigs. In a densely populated area in south-eastern Nigeria, this species was found to be depositing its larvae in various sites in a village, such as the soil under the overhanging eaves of houses, at the base of wooden fences, under piles of yam tubers stacked against houses and in damp soil between water-storage pots. It was also breeding in farmland nearby beneath stems of banana plants, under broad leaves of mature cocoyam plants and at the base of fences. In another village nearby it was breeding in the soil at the bases of the stem masses in thickets of Lantana cámara [cf. 55 213], and only in those thickets that were thinly leaved at ground level.Item A Note on the Parasitisation of the Pupa of Glossina Palpalis (R.-D.) by Anastatus Motscb. sp. (Hym, Eupelmidae)(1968) Baldry, D.A.T.; Nigerian Institute for Trypanosomiasis Research, Kaduna, North Central State, NigeriaThe Hymenopteran family Eupelmidae contains a few genera with a very wide host-range (Imms, 1957). In eastern Africa, Anastatus viridiceps Wtstn. was found as a pupal parasite of Glossina morsitans Westw in Zambia (Waterston, 1915; Lloyd, 1916; Ferriere, 1935), while Eupelmel/a tarsata (Wtsti.) was recorded in G. morsitans orientalis Vanderplank in Malawi (Buxton, 1955) and in Southern Rhodesia (Buxton, 1955; Heaversedge, 1968). Hitherto, Eupelmid parasites had not been recorded from any species of Glossina other than G. morsitans and none had been observed in West African tsetse populations.Item Observations on the Peri-Domestic Breeding Behaviour and Resting Sites of Glossina Tachinoides(1970) Baldry, D.A.T.; Nigerian Institute for Trypanosomiasis Research, Kaduna, North Central State, NigeriaIn 1964–65, breeding sites of the tsetse fly G. tachinoides Westw. near Nsukka in south-eastern Nigeria were found in peri-domestic situations (particularly beneath stacked coco-yam tubers and at the base of fences of pig enclosures) and in adjacent farmland (particularly beneath banana and coco-yam plants, under Lantana camara, at the base of farmland fences and around derelict farm buildings). Between them, these sites provide moisture conditions suitable for year-round breeding of G. tachinoides and are not exposed to unsuitably high temperatures (>90°F) for long periods. The night-time resting sites of G. tachinoides in three villages five miles east of Nsukka were sought between May and November 1966 using ordinary torchlight. The most popular resting-sites were dried fronds of oil and coconut palms used for fencing pig enclosures, but a few flies also rested on man-made objects in the villages and on vegetation nearby. Most flies were resting less than two feet above ground level. Day-time observations confirmed the night-time findings. G. tachinoides could probably be controlled, if not eradicated, in the Nsukka area by two applications, a fortnight apart, of DDT emulsion concentrate to pig enclosure fences and pig styes up to a height of 2–3 ft during March–May when the fly population is most concentrated around confined pigs.Item Polytene chromosomes of GlossilUl palpalis Robineau-Desvoidy (Diptera : Muscidae). I. The preliminary demonstration(Royal Entomological Society, 1970) Baldry, D.A.T.; Burchard, R.P.; Nigerian Institute for Trypanosomiasis Research, Kaduna, Nigeria, Entomologist, Tryproject, P.O. Mirogi, via Kisii, Kenya.An account is given of an improved method of demonstrating the occurrence of polythene chromosomes in the muscle tissue of developmental stages of Glossina palpalis. Burchard & Baldry (1970) have described what is believed to be the first demonstration of polythene (giant, banded) chromosomes in tsetse fly tissue. The present paper describes recent modifications of the method of preparation, by means of which better spreading and demonstration of these chromosomes has been achieved.Item A Review of 50 Years Entomology of Insect borne Diseases of Veterinary Importance in Nigeria, With Special Reference to Tsetse Flies and Trypanosomiasis(1967) Baldry, D.A.T.If one considers those diseases of veterinary importance in Nigeria that are transmitted by insects a considerable number of insect species and the diseases associated with them can be brought to mind. To describe them an in detail would be a task far beyond the scope of this contribution but in order that their variety and number may be appreciated and in order that those of outstanding importance may be demarcated from the remainder and receive more detailed consideration the majority of them are described very briefly in the following section. In reviewing these insect-borne diseases as they occur in Nigeria the impression is perhaps given that veterinary entomologists are faced with a considerable number of disease vectors of nationwide importance. If both the vector and the diseases it is capable of transmitting were widely distributed and continuously under optimum epidemiological conditions this might be true and the problems facing the entomologists would be enormous. Fortunately for the entomologist and. more important still for the livestock of Nigeria many of the diseases and/or their vectors considered here have for one reason or another restricted distributions and/or are seasonal in occurrence. Bearing in mind that some of the diseases that will be referred to can be very important to the livestock of Nigeria in some localities and at certain times of the year, their importance is by comparison dwarfed by the magnitude of a group of diseases known collectively as the trypanosomiasis, which ale transmitted by the tsetse fly and a small number of other biting flies. The different types of animal trypanosumiasis are lethal or deleterious to all types of mammalian livestock encountered in Nigeria, while another and fatal form of the disease known as human trypanosomiasis (sleeping sickness) is widely distributed in the northern part of Nigeria.
