Zobrazeno 1 - 10
of 27
pro vyhledávání: '"R. M. Newson"'
Publikováno v:
International Journal of Tropical Insect Science. 12:627-633
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 between 0800 and 1000 hr, whi
Publikováno v:
Scopus-Elsevier
Tick-susceptible Friesian steers were used as bait animals to assess the availability of adult Rhipicephalus appendiculatus Neumann on the pasture. Assuming that initial gross pickup rates of ticks by cattle were similar, the numbers of female ticks
Publikováno v:
Biocontrol Science and Technology. 1:147-156
Research conducted on natural enemies of ticks, namely predators, parasitoids and pathogens, is reviewed. Predators include ants, birds, rodents, lizards, shrews, spiders and domestic chickens. All the known parasitoids are hymenopteran wasps belongi
Publikováno v:
Journal of Zoology. 220:249-256
A new species of land planarian is described from Kenya. Microplana rermirophaga sp. nov. preys on termites by capturing them at the openings to their nest. The pharynx is unusually far forwards for a land planarian and this is probably related to th
Autor:
R. M. Newson, J.J. de Castro
Publikováno v:
Parasitology today (Personal ed.). 9(1)
Cattle ticks are an important constraint on the livestock industry, particularly in tropical and subtropical areas, mainly because of the diseases they transmit and the costs of control. Conventional control is by means of acaricides; although there
Publikováno v:
Experimentalapplied acarology. 12(3-4)
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 due to environmental factors w
Publikováno v:
Parasitology. 93:9-16
SUMMARYThe maintenance of Theileria parva parva infection in an endemic area of Kenya on the shore of Lake Victoria was studied in the field and laboratory. High prevalences of antibodies against T. parva and T. mutans and intra-erythrocytic piroplas
Publikováno v:
Experimental and Applied Acarology. 5:83-92
Rabbits infested with different stages of Amblyomma variegatum Fabricius, 1794 became resistant to subsequent infestations by the same tick. Resistance was manifested by a reduction of 73.6% in the mean engorged weight of female ticks by the 3rd infe
Publikováno v:
Parasitology. 90:401-409
The effect of host resistance on the feeding and development of Rhipicephalus appendiculatus, the African brown ear tick, was investigated. In this 3-host species the percentages of larvae and nymphs engorging on resistant cattle, and also of those s
Publikováno v:
Parasitology. 99:149-155
A comparison of feeding and breeding performance was made between a laboratory strain (LS) and two freshly collected field strains (FS1, FS2) ofRhipicephalus appendiculatus. The LS had been cultured for over 30 years on tick-susceptible rabbits. When