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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 ...
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 ...
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 ...
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 ...
Susceptibilidad de diez cultivares de maíz (Zea mays L.) a cuatro poblaciones de Meloidogyne incognita
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-07)
The susceptibility of ten corn cultivars (the bybrids X105A (XA) and Tico H4 (T4), and the composites Yonsafwala 7435 (Y), Tuxpeño 1 (Tx1), Poza Rica 7422 (P22), Tlaltizapan 7322 (Tz), Honduras 7322 (H), Poza Rica 7322 ...
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 ...
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 ...
Turrialba Volumen 30, número 4
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1980-10)