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Now showing items 11-20 of 20
The impact of Ixodiphagus hookeri, a tick parasitoid, on Ambl yomma variegatum (Acari: Ixodidae) in a field trial in Kenya
(Uniiversity of Nairobi., 1997-02-01)
In an experiment to investigate the effect of the tick parasitoid, Ixodiphagus hookeri, on tick numbers on cattle, 150 000 parasitoids were released over a period of 1 year in a field where ten cattle infested with multiple ...
Predation of free-living engorged female Rhipicephalus appendiculatus
(University of Nairobi., 1991-10)
In experiments done over a period of 1 1/2 years using engorged female Rhipicephalus appendiculatus tethered in a grass plot, 42% predation was observed in long grass (40-60 cm), and 36% in short grass (6-10 cm). Deaths ...
Ticks and tick-borne parasites associated with indigenous cattle in Didtuyura Ranch, southern Ethiopia
(University of Nairobi., 1998)
Tick populations were monitored between October 1991 and September 1992 at monthly intervals on 10 Boran (Bos indicus) heifers at Didtuyura ranch, Yabelo district, Ethiopia. Twelve different tick species in four genera ...
Drop-off patterns for engorged adult females, nymphs and larvae of Rhipicephalus appendiculatus
(University of Nairobi., 1991-12)
A drop off rhythm of engorged Rhipicephalus appendiculatus Neumann was demonstrated for females and engorged nymphs, but not for larvae. Seventy per cent of 1279 engorged R. appendiculatus females dropped off the animals ...
Experimental infections of the tick Rhipicephalus appendiculatus with entomopathogenic fungi, Beauveria bassiana and Metarhizium anisopliae, and natural infections of some ticks with bacteria and fungi
(University of Nairobi., 1995-09)
Two strains of the entomogenous fungus, Beauveria bassiana, were found to be pathogenic to all stages of the tick Rhipicephalus appendiculatus in the laboratory. A mortality of up to 73 percent of unfed adults was recorded, ...
Some aspects of sexual receptivity and refractory behaviour in female Glossina morsitans morsitans Westwood
(University of Nairobi., 1993-12)
Sexual receptivity was investigated in female Ghssina morsitans morsitans Westwood after mating. The degree of insemination and duration of copulation could affect sexual receptivity when females mate with immature males. ...
Prospects for Biological Control of Livestock Ticks,Rhipicephalus appendiculatusandAmblyomma variegatum,Using the Entomogenous FungiBeauveria bassianaandMetarhizium Anisopliae
(Elsevier, 1996-01)
Both Beauveria bassiana and Metarhizium anisopliaeinduced approximately 30% mortalities in adultRhipicephalus appendiculatusfeeding on rabbits whileM. anisopliaeinduced a mortality of 37% in adultAmblyomma variegatum.Both ...
Development, reproductive capacity and survival of Amblyomma variegatum and Boophilus decoloratus in relation to host resistance and climatic factors under field conditions
(University of Nairobi., 1998-02)
To determine the developmental periods, fecundity and survival of Amblyomma variegatum and Boophilus decoloratus and the effect of host resistance, a study was carried out in the field at Abernossa ranch in Ethiopia using ...