Repositorio Institucional CATIE: Recent submissions
Voici les éléments 781-790 de 12165
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A note on Phytophthora palmivora infected flower cushions on cacao at La Lola, Costa Rica
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1967-04-01)Se examinaron mazorcas de 1200 árboles de cacao de 8 años de edad en noviembre, 1966, período cercano al de mayor producción. Este estudio demostró que 30 por ciento de las 181 mazorcas enfermas por Phytophthora, fueron ... -
Physiological studies of tropical anthracnose fungi. I. Effectos of banana peel extract on conidial germination in Gloeosporium musarum
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1967-04-01)Summary. ripe. The inability of the fungus to grow on the peels of green fruits is called dormancy. This phenomenon has remained unexplained for many years. Data are presented here showing that there is no toxic, ... -
Suspensibility of prospective new copper fungicides
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1967-04-01)In a sedimentation test of four copper-based fungicides designed to estimate particle size, none of the materials tested settled as slowly as Coprantol, one of the products shown in a previous test to have very small particles. -
A preliminary investigation of Raphia Palm swamps, Puerto Viejo, Costa Rica
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1967-04-01)Examination of Raphia taedigera communities has shown that they are important in lowland succession. These communities were studied using the ecological methods of line transects for vegetation shorter than trees and the ... -
Ensayo con antibióticos en plantas de soja (Glycine max)
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1967-04-01)Se probaron cinco antibióticos en cuatro dosis. en el cultivar de soja Dorman contra el ataque de Diapor, Phaseolorum var. sojae. No se obtuvo protección con los antibióticos, aunque hubo un aumento en el peso de 100 ... -
Stereophotographs for scientific purposes
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1967-04-01)The application of stereo photography can provide more information than that obtained from simple photographs due to the three-dimensional view obtained during observation. A method is described for taking two photographs ... -
Dimensional stabilization od tropical harwoods with polyethylene glycol
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1967-04-01)The effect of PEG-1000 (polyethylene glycol) in controlling wood shrinkage was determined using 11 tropical wood species. Treatments were cold soaking for 2, 4, or 6 weeks followed by blast drying of the green wood (Program ... -
El sistema de Küchler. Un enfoque fisionómico-estructural para la descripción de la vegetación
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1967-04-01)Se establece la necesidad de métodos descriptivos adecuados para la clasificación de la vegetación. Se discuten los métodos de descripción y clasificación que deben observarse. Se analizan los principales enfoques utilizados ... -
Variation and hybridization in Sorghum almum Parodi
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1967-04-01)Variation and hybridization of Sorghum almum Parodi was observed in relation to prassic acid content, pollen fertility, seedling color, plant height, vizome expression, seed size, and seed separation. Topcross and polycross ... -
Some evolutionary aspects of a water stress on flowering in the Tropics
(Instituto Interamericano de Ciencias Agrícolas (IICA), 1967-04-01)An attempt was made to investigate some of the adaptations that allow certain nopical plants to flower during the wet season. This was done by comparing floral morphology and pollen resistance to different humidity conditions ...
