Search

The aim of this study was to evaluate the efficiency of nanocopper solutions as a fungicide in the control of Fusarium sp. on pineapples for export in Ecuador. Inhibitory solutions were obtained by electrochemical ionisation. Fusarium sp. was isolated from pineapple epicarp samples and the inhibition ring caused by nanocopper solutions at 3, 6 and 9 ppm was measured in Petri dishes. Pineapples were also subjected to disinfection by immersion in these solutions for 3, 6 and 9 min, following an experimental design of 32, with triplicates and controls with distilled water. In this sense, the number of CFU/mL of the fungus on the surface of the fruit was evaluated the day of immersion (0 days) and 5 days after immersion. The results show that the growth of the inhibition ring of Fusarium sp. on PDA agar was reduced 53% when a solution of copper nanoparticles at a concentration of 9 ppm was used, compared to the control treatment. Regarding the inhibition of Fusarium sp. on the surface of disinfected pineapples by immersion, the best treatments in day 0 of immersion were disinfection for 9 min in the nanocopper solution with concentrations of 6 and 9 ppm. For the disinfection of the pineapples after 5 days of immersion, four statistically viable options were established: disinfecting the pineapples for 9 min in nanocopper solutions at 6 or 9 ppm, or immersing the pineapples in 9 ppm nanocopper solution for 6 or 9 min. [ABSTRACT FROM AUTHOR]

Knowing the diversity and uses of corn is essential for food security. The characteristics of the seeds are important because they have particular characteristics that producers look for in their consumption or storage. In ten maize materials (seven natives and three free pollination varieties) information was obtained on the morphometric characteristics in seeds (length, width, thickness, and area), percentage of floury and crystalline endosperm through images, hardness with the help of a Sitophilus texturometer and oviposition through of a staining technique. Differences were identified between all the materials in all the variables analyzed. The Sac beh and Nukuch nah materials registered higher hardness, they also excelled in the amount of crystalline endosperm registering 85 and 84% respectively, however, the Sac beh was one of the most affected with the oviposition of Sitophilus with nine eggs per 10 seeds on average, in contrast to Chac choc (red seed) which was not affected. The variability within the native materials can provide alternatives for genetic improvement programs oriented to postharvest handling and have characteristics that together reduce the effects of the Sitophilus attack. [ABSTRACT FROM AUTHOR]

Copyright of Revista Ciencia y Tecnología Agropecuaria is the property of Agrosavia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The aim of the present study was to examine the use of different mixtures of a-pinene (PN) and blueberry extract (EA) in coatings and assess their effects on strawberry post-harvest quality during storage (12 days). Coatings were made based on low acyl gellan (GBA) containing EA (50 mg/mL) and PN (300 µL/L). The results showed that the application of the coatings significantly decreased strawberry weight loss. The presence of EA reduced ΔE values in coated strawberries, since at the end of the storage period, coated strawberries (0.0PN/100EA) had a value of 7.45 while the value for uncoated strawberries was 17.77. Adding PN to coatings decreased Penicillium spp growth. In conclusion, GBA-based coatings containing mixtures of EA and PN can be used to preserve strawberries since they prevent fungal growth without reducing strawberry postharvest quality. [ABSTRACT FROM AUTHOR]

The aim of this study was to evaluate changes in physical and chemical laboratory of post-harvest quality of papaya ‘Formosa’ Tainung a subject to mechanical damage by impact, the different heights of falls and also evaluate the physical changes through compression test fruits stored at room temperature and stored refrigerated for a period of five days. Tests including mechanical damage (experiment I) and compression (experiment II) in papaya (Carica papaya L.) variety ‘Formosa’. Fruits were evaluated for weight loss (%), soluble solids, acidity, pH, longitudinal and transverse length, average thickness of the pulp cavity diameter ovarian and firmness. The first experiment was conducted incompletely randomized design (CRD) in factorial 2 x 4 (storage time x drop height) and experiment II in a factorial 2 x 5(temperature x storage time). It could be concluded in the first trial that some physical and chemical characteristics of papaya ‘Formosa’ are changed to be damaged by impact, such as acid soluble and weight loss. The second experiment shows that the firmness of the fruits decreases with storage time, this decrease being at least refrigerated to ambient 10 °C and 90% RH. [ABSTRACT FROM AUTHOR]