Results 191 to 200 of about 10,839 (231)
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Toxicity of piperonyl butoxide to Boophilus microplus
Nature, 1974SYNERGISM studies with the cattle tick Boophilus microplus have been effected by enclosing larvae in packets impregnated with olive oil solutions of the test chemicals and recording mortality after 48 h1,2. In these conditions larvae exposed continuously to 0.4% piperonyl butoxide were apparently unaffected.
C A, Schuntner +2 more
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Test for Assortative Mating Between Boophilus microplus and Boophilus annulatus (Acari: Ixodidae)
Journal of Medical Entomology, 1992The closely related cattle ticks, Boophilus microplus (Canestrini) and B. annulatus (Say), were tested for possible assortative mating under conditions designed to mimic those in the field. Patterns in the numbers of the four possible types of matings were generally indicative of a preference for conspecific mates in both species.
L R, Hilburn, R B, Davey
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Boophilus microplus: Passive Transfer of Resistance in Cattle
The Journal of Parasitology, 1976Plasma from cattle highly resistant to the tick Boophilus microplus conferred some resistance to unexposed calves. In contrast plasma from hosts of low resistance had no significant effect compared with plasma from unexposed donors.
J A, Roberts, J D, Kerr
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Efficacy of Azadirachta indica extracts against Boophilus microplus
Parasitology Research, 2008Extracts were prepared from leaf, bark, and seed of Azadirachta indica, leaf and seed of Prunus persica, bark of Mangifera indica, and leaf of Psidium guajava and were evaluated against Boophilus microplus. Of the eight extracts screened, the extracts prepared from the A.
Rahul, Srivastava +6 more
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Parthenogenesis in the Cattle Tick, Boophilus microplus
Nature, 1963ALTHOUGH bisexual reproduction is usual among ticks, there have been reports of parthenogenesis in various species including Amblyomma agamum1, Rhipicephalus bursa2, A. dissimile3, Hyalomma anatolicum4, Ornithodorus moubata5, and Haemaphysalis bispinosa6; but there appears to be no previous record of parthenogenesis in Boophilus microplus.
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Responses of cattle to allergens from Boophilus microplus
International Journal for Parasitology, 1978Abstract Extracts of larvae of the cattle tick, Boophilus microplus , contain two allergens giving immediate hypersensitivity reactions in the skin of cattle which have been exposed to the tick. The partial purification of one of these is described. This, together with the other allergen whose purification has been described previously, was used to ...
P, Willadsen +3 more
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Boophilus microplus: Strain differences of the cholinesterase system
Experimental Parasitology, 1978Abstract Cholinesterase (EC 31.1.7 and EC 31.1.8) activity was determined for homogenates of two Argentinian strains of larval ticks, Boophilus microplus . One strain (strain A) was sensitive to organophosphate acaricides. The other strain (strain G) was insensitive to coumaphos and to a lesser degree to other acaricides.
C I, Reich +3 more
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Boophilus microplus: Antihistaminic and tranquillizing drugs and cattle resistance
Experimental Parasitology, 1969Abstract A significant increase occurred in the yield of engorged Boophilus microplus (Acarina, Ixodidae) from eight out of twelve continuously infested bovine hosts treated with the antihistaminic promethazine hydrochloride (Phenergan). Using other drugs an increase occurred with only one host out of six.
R J, Tatchell, G F, Bennett
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Carboxylesterases from Boophilus microplus hydrolyze trans-permethrin
Pesticide Biochemistry and Physiology, 1983Abstract An esterase which hydrolyzes the ester bond of trans -permethrin has been partially purified from homogenates of larvae of the cattle tick. The final (gel filtration) step showed two distinct peaks of p -nitrophenylbutyrate-hydrolyzing activity.
Peter W. Riddles +2 more
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Boophilus microplus tick burdens on grazing cattle in Colombia
Tropical Animal Health and Production, 1984This study was conducted at Carimagua Research Centre in a well-drained savanna area in the eastern plains of Colombia. The objectives were to note the effect of ecological factors on tick burdens, principally the effect of the environment given by four grasses on the seasonal variations of tick populations. Adult female tick counts were carried out on
E, Aycardi +5 more
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