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Now showing items 111-119 of 119
Notas preliminares sobre el barrenador de los brotes terminales del pino, Rhyacionia frustrana (Lepidoptera; Tortricidae) en Costa Rica
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-04)
Young plantations of pine species, Pinus caribaea var, hondurensis, P. oocarpa, P elliotti, P. canariensis P kesiya and P. radiata, have been found sererely attacked by the tortricid, Rhyacionia frustrana Comstock in ...
Efecto del blasticidin en el control del virus del mosaico del tabaco
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-07)
The inhibiting effect of Blasticidin on Tobacco Mosaic Virus (TMV) was studied Doses of 10, 1, 0.1 and 0.01 ppm were used to estimate the amount of product useful to determine inhibition of the virus. The product was applied ...
Tablas de volumen para Eucalyptus camaldulensis en Nicaragua
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-07)
Overbark and underbark double-entry tables for total volume are presented for trees of Eucalyptus camaldulensis in Nicaragua as well as tables to a minimum top diameter of 5 em. Data were collected from a total of 61 trees ...
Actividad citoquinina y efecto de la nutrición nitrogenada en el desarrollo de raíces tuberosas de Ipomoea batatas
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-07)
The relationship between tuberization induced by a period of nitrogen withdrawal and the cytokinin activity in roots, shoots and xylem exudate was investigated in water cultured plants of sweet potato (lpomoea batatas ...
Isotermas de adsorción de fósforo en sedimentos del estuario de Maracaibo (Lago de Maracaibo)
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-07)
Eight sediment samples from Maracaibo's estuary (Lago de Maracaibo) were assessed for their capacity to sorb different amounts of added phosphate, the results were studied according with the Langmuir, Freundlich and Temkin ...
Actividad estrogénica de cuatro variedades de trébol (Trifolium sp.) asociados a gramíneas y reconocimiento de isoflavonas en T. repens var. Ladino
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-10)
Estrogen activity in lbw- varieties of clover alone or in association with grasses in the Bogota Savannah in the Andean highlands at an altitude of 2 600 masl was measured by comparing radioactive estradiol by receivers. ...
Modelo matemático del balance hídrico agroclimático
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-10)
An agroclimatic model which simulates the evolution of the soil water balance under perennial crops is proposed. The model is recurrent, operates with a rime step of one day and utilizes daily rainfall data, potential ...
Identificación de especies y biotipos de Brucella aisladas en Costa Rica
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-10)
This is the first report of the presence and identification of BruceIla in Costa Rica. BruceIla abortus was isolated from eight bovine aborted fetus and from the blood of one human case. All the bovine isolates belonged ...
Aplicación de N y de estiércol en la lechuga (Lactuca sativa L.)
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-10)
The objetive of this study was to know the amount and the application form of nitrogen and the levels of poultry manure (P. M) more efficients in the lettuce (Lactuca sativa L. cv Great Lakes, crisp head salad) production ...