O CONTROLE DA BIOSSÍNTESE DE ETILENO EM PRÉ-COLHEITA PODE REDUZIR PERDAS E MELHORAR A QUALIDADE DO TOMATE PARA PROCESSAMENTO INDUSTRIAL?

Abstract

This study was carried out to control ethylene biosynthesis in preharvest, by combined or isolated application, inhibitors and precursors of ethylene synthesis. The experiment was performed in Morrinhos - GO, from March to July 2016. The experimental design was randomized blocks with eight treatments and four repetitions: Check (T1) - Water + spreader adhesive; T2 - 62.5 g ia (active ingredient) ha-1 Retain (aminoethoxyvinilglycine); T3 - 125 g ia ha-1 Retain; T4 - 250 g ia ha-1 Retain; T5 - 140 g ia ha-1 of Ethrel (2-chloroethylphosphonic acid); T6 - 62.5 g ia ha-1 Retain + 140 g ia ha-1 Ethrel; T7 - 125 g ia ha-1 Retain + 140 g ia ha-1 Ethrel; T8 - 250 g ia ha-1 Retain + 140 g ia ha-1 Ethrel. They evaluated the productivity, fruit color (green, green-orange and ripe), rotten and damaged fruit, firmness, soluble solids, titratable acidity and pH. Analyzed variables did not show statistically significant differences, except the percentage of mature fruits, in which T5, had the highest average, 62.60%. T7 showed the greatest firmness, 56.7 Newtons. Most obtained yield was 155.019 T ha-1 observed in treatment 5, which also stood out as the soluble solids. For the variable acidity, T7 was superior to the others. All treatments showed good levels of pH. In general, T5 showed the best results for the assessed variables.