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Osuna-Garcia J.A.,INIFAP Campo Experimental Santiago Ixcuintla | Doyon G.,Agriculture and Agri Food Canada | Salazar-Garcia S.,INIFAP Campo Experimental Santiago Ixcuintla | Goenaga R.,Tropical Agriculture Research Station | Gonzalez-Duran I.J.L.,INIFAP Campo Experimental Santiago Ixcuintla
Journal of Agriculture of the University of Puerto Rico | Year: 2011

Mexico is the main 'Hass' avocado exporter in the world. More than 300,0001 are exported every year. The United States of America, Japan, the European Union, and Canada are the main importer countries. Recently, 'Hass' avocado shipments to Canada containing fruit with skin blackening have been rejected since this characteristic is associated with low pulp firmness and short shelf life. The objective of this study was to determine the relationship between skin color of 'Hass' avocado fruit with quality characteristics. Fruit varying in black skin color (from 0 to 100%, categories 1 to 5) were collected from two different packinghouses in Michoacán, Mexico. Treatments were arranged in a split-plot design with five replications. Significant differences were detected between packinghouses for weight, length, skin color ('a', 'b', chroma and hue) and pulp firmness but not for width, dry matter content or the Avocado Maturity Index (AMI). As color skin category increased towards more blackened fruit, AMI value increased, firmness decreased but dry matter content did not change. These results provide evidence that fruit skin blackening is not associated with lower fruit quality, but it did lower pulp firmness at fruit packing.

Castaneda-Vildozola A.,University of Central Mexico | Nava-Diaz C.,Colegio de Mexico | Duarte M.,University of Sao Paulo | Franco-Mora O.,University of Central Mexico | Hernandez-Fuentes L.,INIFAP Campo Experimental Santiago Ixcuintla
Neotropical Entomology | Year: 2011

This is the first record of Oenomaus ortygnus (Cramer) damaging fruits of ilama (Annona diversifolia) and extends the butterfly distribution for three states in Mexico. © 2011 Sociedade Entomológica do Brasil.

Osuna-Garcia J.A.,INIFAP Campo Experimental Santiago Ixcuintla | Brecht J.K.,University of Florida | Huber D.J.,University of Florida | Nolasco-Gonzalez Y.,INIFAP Campo Experimental Santiago Ixcuintla
HortTechnology | Year: 2015

Gaseous 1-methylcyclopropene (1-MCP) delays mango (Mangifera indica) fruit ripening, but requires 12 hours of application in sealed containers. In some fruit species, aqueous formulation applied as a postharvest dip for only 1 to 5 minutes has shown the same effectiveness as gaseous 1-MCP. This research was conducted to determine the effectiveness of aqueous 1-MCP on delay of the ripening process, extension of shelf life, and maintenance of fruit quality of ‘Kent’ mango fruit with or without quarantine hot water treatment (QHWT). Three experiments were conducted during the 2013 season in Mexico and Florida and during the 2014 season in Mexico. Aqueous 1-MCP caused delay of fruit ripening as shown by maintenance of fruit firmness, attenuation of flesh color development, and delayed increase of total soluble solids (TSS). However, it had a negative interaction with QHWT, causing surface spots and lenticel blackening to develop during shipping simulation [3 weeks at 12 ± 1 °C, 90% ± 5% relative humidity (RH)] and market simulation (7 days at 22 ± 2 °C, 75% ± 10% RH). This negative interaction was less when 1-MCP was applied before QHWT, somewhat higher when 1-MCP was applied after QHWT, and most severe when 1-MCP was applied after QHWT D hydrocooling. By contrast, the ripening of fruit treated with1-MCP without QHWT was delayed without affecting external appearance. Thus, 1-MCP may be more useful for mango markets that do not require mandatory QHWT. © 2015 American Society for Horticultural Science. All rights received.

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