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El virus rayado fino del maíz en Venezuela [Zea mays]
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-10)
Maize rayado fino virus (MRFV) was isolated in Venezuela from plants showing dwarfing and parallel leaf stripes along the veins. The virus particles are isometric with 33 um in diameter and became separated in two bands ...
Desarrollo de subsistemas de alimentación de bovinos a base de rastrojo de frijol (Phaseolus vulgaris, L). III. Producción de carne
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-04)
An experiment was conducted to evaluate common bean crop residues (CBR) as a feed for beef cattle. Feed conversion to beef was poor, this being in contrast to other favorable nutritional features of CBR. Consequently, and ...
Anacardium excelsum, especie forestal de los trópicos americanos
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-01)
Caracterización morfométrica de cuatro poblaciones de Meloidogyne incognita de Costa Rica
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-04)
Four Meloidogyne incognita populations (M-50, M-53, M-55 and M-56) collected from different areas of Costa Rica were characterized morphometrically. Significant differences among them were found in tail length, anal body ...
Determinación cuantitativa de la floración en café Coffea arabica L
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-04)
A quantitative method is described for determining flowering in coffee. The size of each bloom is estimated visually with the aid of the following scale: 1-25%, 2-50%, 3-75% and 4-100% after a general survey of the planiation. ...
La ultraestructura de la superficie foliar de cultivares de maíz infectados con el virus del rayado fino [Zea mays]
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-10)
The ultrastructural alterations induced by rayado fino virus in the foliar lamina of infected maize plants vary with plant genotype. The chlorotic spots or short stripes, typical of the macroscopic disease symptom, do not ...
Productividad potencial de diferentes cruces comerciales DxP de palma africana (Elaeis guineensis Jacq.) en Coto, Costa Rica
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-07)
In 1969, two yield trials werw planted to compare different D x P (Dura x pisifera) commercial of oil palm (Elaeis guinecnsis Jacq). The objective of this was to evaluate diverse genetic germplasm under local conditions, ...
Variación estacional de la reductasa de nitrato en el cafeto
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-07)
The sesonal trends of nitrate reductase activily, of NO-3 induced activity of the same enzyme, and of the quotient between them, aRNi/aRNb, known as Nitrate Assimiletion Potential, were investigated. Assays were carried ...
Análisis del incremento de madera en plantaciones de Pinus caribaea var. hondurensis Barr et Golf en Turrialba, Costa Rica.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-04)
The increment of Pinus caribaea var hondurensis between 9 and 12 years of age has been calculated for 10 sample plots of 0,1 ha each established within small plantations in the Valley of Turrialba, Costa Rica. The mean ...
Variaciones morfométricas y respuesta de nueve hospedantes diferenciales a tres poblaciones de Meloidogyne javanica de Costa Rica
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-07)
Three Meloidogyne javanica populations (MJ-1, MJ-2 and MJ-3) collected from Theobroma cacao, Nicotiana tabacum and Stachytarpheta jamaicense at different localities of Costa Rica, were characterized morphometrically and ...