Quality of ‘Isabel’ grape treated pre-harvest with CaCl2 and citrus biomass-based elicitor

Abstract

The high rate of fruit decay and berry drop reduces quality and increases postharvest losses in 'Isabel' grapes, requiring pre-harvest and postharvest management practices available to the small-scale farmer, which maintain quality and extend postharvest life of the clusters. The objective of this study was to evaluate the effect of the pre-harvest application of CaCl 2 and Citrus Biomass-based elicitor in 'Isabel' grapes, in the maintenance of quality during storage at room conditions under ambient and modified atmospheres. The experiment was conducted in a randomized block design with 8 replicates, in the field located at the municipality of São Vicente Férrer-PE, Brazil. 'Isabel' vines were treated 28 days before harvest with: Citrus Biomass-based elicitor (CB), Citrus Biomass-based elicitor + CaCl 2 (CB + C), CaCl 2 (C) and Control (T) -without application. Grapes harvested in the commercial maturity were stored in a 4 × 2 × 7 factorial arrangement, with 4 treatments (applied in the field), 2 storage conditions, ambient (AA) and modified (AM) atmospheres, under room conditions (25 ± 2 °C and 75 ± 2% RH) and 7 evaluation periods in four replicates. The application of CaCl 2 and CB-based elicitor reduced the berry drop index (55 and 75%, respectively), the decay and weight loss of 'Isabel' grape clusters. These treatments, associated or not, increased MA efficiency in maintaining cluster quality. The 'Isabel' grape berry drop index was directly influenced by the SS/TA ratio, pH and fruit decay index. Key words: Modified atmosphere. Berry drop. Resistance inducers. Decay. Vitis labrusca. ResumoO alto índice de degrana e podridão das bagas reduzem a qualidade e elevam as perdas pós-colheita em uvas 'Isabel', demandando técnicas de manejo na pré e pós-colheita acessíveis ao pequeno produtor, que mantenham a qualidade e ampliem a vida útil pós-colheita dos cachos. Assim, este trabalho teve por objetivo avaliar o efeito da aplicação na pré-colheita de CaCl 2 e elicitor à base de biomassa cítrica em uvas 'Isabel' na manutenção da qualidade durante o armazenamento na condição ambiente sob atmosferas ambiente e modificada. O experimento foi conduzido em blocos casualizados a campo, no município de São Vicente Férrer-PE com 8 repetições. Videiras 'Isabel' foram tratadas, 28 dias antes da

Effect of Active Packaging Material Fortified with Clove Essential Oil on Fungal Growth and Post-Harvest Quality Changes in Table Grape during Cold Storage

“…Disease severity was analyzed following a 6-point empirical scale (0 = 0% fruit surface infected; 1 = 1–20% fruit surface infected; 2 = 21–40% fruit surface infected; 3 = 41–60% fruit surface infected; 4 = 61–80% fruit surface infected; 5 = 81% or more surface of fruit infected and showing sporulation) [ 34 , 35 ]. The fruit drop of TG was analyzed at every 3-day interval of storage up to 30 days [ 35 ].…”

Changes in quality during maturation of physalis fruit

“…The physical evaluations were: Fresh mass, determined by the individual weighing of the fruits in semianalitical scale, expressed in grams (g); Length and diameter with the aid of a digital caliper, in millimeters (mm); Objective color, measured through Minolta digital colorimeter and expressed in the parameters L*, a*, b*, C and ° H, where: L* -corresponds to the brightness/luminosity; a* -defines the transition from the green color (-a*) to the red color (+ a*) and b * -represents the transition from the blue color (-b*) to the yellow color (+ b*), farther from the center (= 0), more saturated color; Chroma (C*) (chromaticity or color intensity) and the Hue angle (° H), where 0 ° = red, 90 ° = yellow, 180 ° = green, 360 ° = blue; and Firmness, determined in the intact fruits by digital bench Penetrometer (Soil Control -model PDBF -200), expressed in Newton (N) (SANTOS et al, 2017).…”