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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 ...
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. ...
Menos escarabajos dañinos en frijol y caupí en cultivo asociado con banano en Costa Rica
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-04)
Pest beetles were sampled with a sweep net from beans and cowpeas growing in monoculture plots and in polyculture plots with banana in Costa Rica. There were approximately three times as many Diabrotica balteada and Cerotoma ...
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)
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 ...
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 ...
El control de la gallina ciega (Phyllophaga sp.) en maíz [Zea mays] con insecticidas aplicados por métodos sencillos
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1979-01)
Se estudió el efecto de cinco insecticidas en el control de larvas de Phyllophaga sp. (Gallina Ciega) en maíz sembrado durante la época lluviosa. Estos productos se seleccionaron debido a su baja toxicidad al contacto con ...
Turrialba Volumen 30, número 4
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-10)