There is limited information in Colombia on the effect of rootstock compatibility on the amount and concentration of nutrients in avocado cv. Hass. This study aimed to determine the effect of rootstock/scion compatibility on fruit and leaf nutritional concentration. This experiment was developed in 9-year-old commercial avocado ‘Hass’ orchards in three locations with a moderately cold climate in Colombia (Rionegro, El Peñol, and Anserma). The scion cv. Hass was grafted on rootstocks with an Antillean origin. 15 trees were selected and marked in each orchard and location, and 25 fruits per tree and per treatment were taken at random (compatible and incompatible grafting). Subsequently, the fresh and dry weight of the skin (epicarp), the pulp (mesocarp), seed, and the seedcoat were obtained. The concentration of major and minor elements was analyzed in each tissue. There was no significant effect on the concentration of nutrients in the fruits from trees with and without compatibility between rootstock and scion. Statistical differences were observed at three locations in the concentration of nutrients in the different parts of the fruit. The nutrient with the highest concentration in the four fruit tissues was K, followed by N. The seed coat had the highest concentration of nutrients for all locations. The embryo had the lowest concentration of the major elements, such as N, K, Ca, Mg, S, and P. The order of the concentration in the fruit tissues was: K> N> Mg> P> Ca> S> Fe> B> Zn > Mn. The compatibility did not show significant differences between the leaf mineral content, nor did it affect the nutrient balances for each element at the foliar level.

2018) First report of Zethus schadei (Hymenoptera: Vespidae) as natural enemy of Hypsipyla grandella Zeller (Lepidoptera: Pyralidae) from Colombia. Acta Zoológica Mexicana (nueva serie), 34, 1−3. ABSTRACT. Zethus schadei Bohart & Stange is reported for the first time for Colombia and as a natural enemy of Hypsipyla grandella. The specimens were obtained from terminal shoots of Cedrela odorata L. (Meliaceae) in a plantation in the municipality of San Roque, Antioquia, Colombia.

No abstract

Jagua (Genipa americana L.) is widely distributed throughout the Americas. It has been used since ancient times due to the pigments extracted from its fruit. This study aimed to evaluate the vegetative growth of five Jagua accessions by adjusting non-linear models to dasometric growth variables. The accessions (Porce, Chigorodó, San Carlos, San Luis, and Vigía del Fuerte in Antioquia) were collected in the central-western region of Colombia. The growth, determined through plant height and stem diameter (at 0.10 and 1.30 m), was evaluated for 262 weeks in the municipality of Amalfi. A descriptive analysis of the growth behavior of each accession was performed, and the fit of four nonlinear functional models was evaluated. An influence of the accession factor on growth was found due the different growth rates. The Weibull model was the one with the best fit and predictive capacity, which confirmed the differences between accessions.

Esta guía está dirigida especialmente a los productores del Suroeste antioqueño para la producción de hierbabuena (Mentha spicata L.) y muestra el paso a paso de los aspectos a tener en cuenta para su producción en campo, cosecha, poscosecha y agroindustria, a partir de un lenguaje sencillo e ilustrado con imágenes de las fincas donde se llevaron a cabo las diferentes actividades y capacitaciones.