Effect of Chemical Thinning Season Using Metamitron on Peaches ‘Sensação’ Quality
Journal Title: Journal of Experimental Agriculture International - Year 2017, Vol 19, Issue 6
Abstract
Aims: The objective of this study was to evaluate peach fruits quality after chemical thinning using metamitron at different times in the South of Brazil. Study Design: The experimental design was in randomized blocks, with five replications of three plants, fruits were harvested and evaluated the central plant in the plot, and twenty fruits were evaluated in each replicate. Place and Duration of Study: The experiment was conducted in a commercial peach orchard ‘Sensação’, in the city of Morro Redondo, Rio Grande do Sul, Brazil, in the years 2015 and 2016. Methodology: Treatments were composed of metamitron application (200 mg L-1) at 20, 30, 40, 50 and 60 days after full bloom (DAFB) and manual thinning performed at 50 DAFB. The epiderms color, pulp firmness, ripening index, soluble solids, titratable acidity, pH, total phenolic compounds and antioxidant activity were evaluated. Results: The manual and chemical thinning at 20 and 30 DAFB contributed to the epidermis greenish-yellow fruits coloration in the year 2015. The lowest maturation indices were verified in fruits submitted to chemical thinning at 20 and 30 DAFB during the two years evaluated. The firmness of fruit pulp increased when peach trees were submitted to chemical thinning at 30 and 60 DAFB in the year 2015. The phenols and antioxidant activity of fruits presented higher concentrations of these compounds in manual thinning during the two years evaluated. Conclusion: Peaches quality was altered according to the thinning methods and the application time of the metamitron performed in the trees. The use of metamitron in peach chemical thinning did not affect the fruits soluble solids content in relation to manual thinning. Thinned fruits quality presented differences in relation to the cycles evaluated for epidermis color, firmness and soluble solids.
Authors and Affiliations
Roseli de Mello Farias, Caroline Farias Barreto, Andressa Vighi Schiavon, Cristiano Geremias Hellwig, Carlos Roberto Martins, Marcelo Barbosa Malgarim, Paulo Celso Mello-Farias
Keywords
Related Articles
- EP ID EP315782
- DOI 10.9734/JEAI/2017/38522
- Views 75
- Downloads 0
Maize Production under Climate Change in a Savannah Region in DR-Congo
Climate change is a serious threat to poverty alleviation in developing countries as it can sweep several decades of development efforts. It is one of the constraints to achieving potential crop yields, and it is a facto...
Bulking and Yield of Cassava (Manihot esculenta Crantz) Following Application of Organic and Inorganic Fertilizers
The research was conducted at Namong Senior High Technical School in the Offinso Municipality in the Ashanti Region of Ghana to determine bulking and yield of cassava following application of organic and inorganic fertil...
Influence of Supplemental Levels of Probiotic on Growth Response, Intestinal Microbiota and Carcass Characteristics of Broilers
The effect of varying levels of commercial probiotic on the performance, microbial status and carcass quality of broiler chickens was investigated in a 42-day experiment between March and April, 2014. Two hundred (200) o...
Effect of Growth Regulators on Plant Growth and Flowering in Dahlia (Dahlia variabilis) cv. Charmit
An experiment entitled “Effect of growth regulators on plant growth and flowering in dahlia (Dahlia variabilis) cv. Charmit” was conducted to evaluate the response of dahlia to different growth regulators (Ethephon @ 500...
Screening of Bacteria as Antagonist against Xanthomonas oryzae pv. oryzae, the Causal Agent of Bacterial Leaf Blight of Paddy and as Plant Growth Promoter
The aim of this study is to screen and characterize bacteria isolated from different sources that has potential as antagonistic bacteria against Xanthomonas oryzae pv. oryzae (Xoo), the causal agent of bacterial leaf bli...