Se llevó a cabo un estudio tendiente a reconocer e identificar los enemigos naturales de las principales especies de moscas blancas (Homoptera: Aleyrodidae), en varios cultivos y regiones de Co lombia y Ecuador y determinar los agentes con mayor potencial en el control biológico de las especies p...
López Avila, A.
,
Cardona Mejía, César
,
García González, J.
,
Rendon, F
,
Hernández, M.P.
,
[Reconocimiento e identificación de enemigos naturales de moscas blancas (Homoptera: Aleyrodidae) en Colombia y Ecuador]
,
Reconocimiento e identificación de enemigos naturales de moscas blancas (Homoptera: Aleyrodidae) en Colombia y Ecuador
Se estableció en Ecuador y Colombia la distribución de las especies de moscas blancas más importantes que están afectando cultivos semestrales. Se identificaron, mediante RAPD con el cebador OPA-04, la mosca blanca de los invernaderos Trialeudores vaporariorum (Westwood) y los biotipos A y B de B...
Quintero, C.
,
Rendon, F
,
García González, J.
,
Cardona Mejía, César
,
López Avila, A.
,
Hernández, M.P.
,
[Especies y biotipos de moscas blancas (Homoptera: Aleyrodidae) en cultivos semestrales de Colombia y Ecuador = Species and biotypes of whiteflies (Homoptera: Aleyrodidae) affecting annual crops in Colombia and Ecuador]
,
Especies y biotipos de moscas blancas (Homoptera: Aleyrodidae) en cultivos semestrales de Colombia y Ecuador = Species and biotypes of whiteflies (Homoptera: Aleyrodidae) affecting annual crops in Colombia and Ecuador
Over the last two to three decades, West Africa has witnessed considerable changes in land use. Unprecedented increases in human population combined with changes in climatic patterns have reduced per capita arable land traditionally available for agricultural production. In the livestock sub-sect...
Agyemang, K.
,
Rege, J.E.O.
,
[Trends in genetic composition of livestock with respect to trypanotolerance and desirable economic traits with special emphasis on mixed farming systems in West and Central Africa]
,
Trends in genetic composition of livestock with respect to trypanotolerance and desirable economic traits with special emphasis on mixed farming systems in West and Central Africa
Specific humoral and cell mediated immunity to blood parasites is reviewed. There is a table detailing the worldwide occurrence of economically important blood parasitic diseases followed by summaries of immunological aspects of trypanosomosis, theileriosis, babesiosis, anaplasmosis, cowdriosis a...
Maquet, A.
,
Gutiérrez, Alberto
,
Debouck, Daniel G.
,
[Further biochemical evidence for the existence of two gene pools in lima beans]
,
Further biochemical evidence for the existence of two gene pools in lima beans
Forages are usually associated with grasslands, but they also occur and are used widely on roadsides, in fallow areas, and as crop residues. In temperate areas livestock is grazed on domesticated forages. In the tropics livestock use native grasslands (Africa, Australia), naturalized grasslands (...
The indigenous breeds of cattle endangered in Africa are identified. Topical dicussions on main reasons for being endangered, their geographical distribution and numbers, their major contribution to economy and the specific traits justifying conservation programmes for the breeds included.
The production performances of Ethiopian sheep and goats are investigated. The structure of sheep and goat industry, livestock improvement through selection and breeding, livestock management and wool production in the country are discussed.
Gap analysis is a well-established conservation technique that identifies areas in which selected elements of biodiversity are represented and through comparison with existing in situ protected area networks identifies habitats or ecosystems that need additional protection. We aim to demonstrate ...
Blair, Matthew W.
,
Brondani, Rosana Pereira V.
,
Díaz, Lucy M.
,
Peloso, Maria José del
,
[Diversity and population structure of common bean from Brazil]
,
Diversity and population structure of common bean from Brazil