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Hemeroteca Nacional Universitaria

Botrytis cinerea was isolated from nonsymptomatic _mora de castilla_ blackberry (Rubus glaucus Benth.) flowers and fruit covering six phenological stages (from unopened floral buds to ripening). Such quiescent infection rarely occurred in unopened floral budshowever, flowers were seen to be colonised soon after opening. The high frequency of quiescent infection in developing and mature fruit c ...

SUBJECT: rubus; botrytis cinerea; mora; hongos; environmental factors

POSTED TO: Agronomía Colombiana [0120-9965]

Roses are the most important ornamental crop grown in Colombia for export. Downy mildew caused by Peronospora sparsa represents one of the crop_s most limiting diseases. Fungicides are most commonly applied for controlling diseasehowever, not enough is known about their effectiveness or the most efficient way of applying them. The object of this research was to evaluate the effectiveness of ap ...

SUBJECT: lutte chimique; morbidite; rosa (genero); fungicidas; fongicide

POSTED TO: Agronomía Colombiana [0120-9965]

Cyparisius daedalus has become a pest in African palm (Elaeis guinnesis J.) plantations on Colombia_s eastern plains. It is currently controlled by releasing S. carpocapsae using a garden wateringcan. Although such approach is considered effective in terms of control, it involves lengthy field application and high costs. The effect of Jacto Super 600, Maruyama MS256 and Royal Cóndor commercial ...

SUBJECT: biological control agents; agent de lutte biologique; lutte integree; steinernema carpocapsae; integrated control

POSTED TO: Agronomía Colombiana [0120-9965]

This study was conducted in two stages. Bomarea seed germination was studied using seeds from the San Jorge páramo and the Bogotá Botanical Garden during the first stage. Scarification and in vitro embryo culture assays were conducted from the results obtained, suggesting that dormancy was due to undeveloped embryos. The efficacy of stratifying at different temperatures and effect of adding gi ...

SUBJECT: culture d'embryon; plantas herbaceas ornamentales; embriones vegetales; stratification; ácido salicílico

POSTED TO: Agronomía Colombiana [0120-9965]

The following treatments were applied in greenhouse conditions to determine the influence of water balance on the cracking of cape gooseberry fruit: (a) control, irrigating every day as indicated by lysimeter(b) severe pruning, irrigating every day as indicated by lysimeter(c) R+(-), heavy irrigation from harvesting week 5 to 19, followed by sparse irrigation between weeks 20 and 29(d) R-(+), ...

SUBJECT: pruning; riego; physalis peruviana; environmental factors; production

POSTED TO: Agronomía Colombiana [0120-9965]

The effects of a proposed chilling treatment for controlling Ceratitis capitata fruit-fly on cape gooseberry fruit were evaluatedthe aforementioned pest is restricted within the USA. Fruit with and without calyx, some previously disinfected with a 100 ppm sodium hypochlorite solution (consisting of 6.25% available chlorine) and some having no calyx and no kind of disinfection were treated at a ...

SUBJECT: technologie apres recolte; physalis peruviana; tecnologia postcosecha; chemicophysical properties; production

POSTED TO: Agronomía Colombiana [0120-9965]

Nutrition represents one of the most effective ways of influencing fruit-tree productivity. Leaf or tissue analysis integrates all circumstances influencing nutrient availability, contrasting with just soil analysis. High content for one nutrient in a tree may reflect another nutrient_s inadequate supply. Synergistic or antagonistic relationships between nutrients must also be taken into accou ...

SUBJECT: crecimiento; substance nutritive; sinergismo; synergisme; nutrientes

POSTED TO: Agronomía Colombiana [0120-9965]

The object of this investigation was to determine two eggplant (Solanum melongena L.) genotypes_ water requirements when subjected to five types of drip-irrigation in the middle Sinu Valley during the dry season. The study was carried out at Corpoica_s Turipaná Agricultural Research Centre located in Cereté in the Córdoba Department." WRAPThe object of this investigation was to determine two e ...

SUBJECT: plant physiology; physiologie vegetale; fisiologia vegetal; solanum melongena

POSTED TO: Agronomía Colombiana [0120-9965]

The purpose of this trial was to evaluate the effect of the applications of urea, molasses and amino acids to the leaves and to the soil, applying single products and in combination, on the growth and yield of a bulb onion crop in the Bogotá Savanna. Under the particular conditions of this research, no product or combination of products showed a better agronomic behavior as compared to the abs ...

SUBJECT: controle de performance; oignon; onions; crecimiento; performance testing

POSTED TO: Agronomía Colombiana [0120-9965]

The Capsicum genus represents a potentially wide-ranging genetic supply of vegetal material, combining the characteristics of pungency, precocity, high-profitable and commercial demand, leading to its inclusion in national and international markets, making them promising products in production systems. This paper has evaluated growth and determined harvest indexes for four chilli pepper access ...

SUBJECT: caracteristicas agronomicas; maturation; varieties; capsicum annuum; harvesting

POSTED TO: Agronomía Colombiana [0120-9965]