Resumo -O objetivo deste trabalho foi avaliar o efeito dos eliciadores acibenzolar-S-metil e proteína harpina, aplicados em pós-colheita, na indução de resistência sistêmica à podridão-parda em pêssegos. O delineamento experimental foi inteiramente casualizado, com quatro repetições, em parcelas subdivididas -com e sem ferimentos provocados aos frutos -, e os tratamentos foram constituídos por: acibenzolar-S-metil (50 mg do i.a. L ) e uma testemunha (água destilada). Os frutos foram pulverizados, individualmente, com 1 mL de solução aquosa com os tratamentos e, após 12 horas, efetuou-se a inoculação com Monilinia fructicola (0,2 mL da suspensão com concentração de 10 5 esporos mL -1 , em cada lado do fruto). Após 60 horas da inoculação, avaliaram-se: a área lesionada, a esporulação e o percentual de controle. Determinaram-se os teores de proteínas totais, açúcares redutores e totais, fenóis, além da atividade da enzima fenilalanina amônia-liase (FAL). Os eliciadores induziram resistência dos frutos a M. fructicola, com redução do desenvolvimento do fungo. O uso dos eliciadores aumentou os teores dos parâmetros bioquímicos avaliados e a atividade da FAL, que esteve relacionada à redução da área lesionada em pêssegos. Os indutores podem contribuir para o manejo integrado da podridão-parda em pêssegos, em pós-colheita.Termos para indexação: Monilinia fructicola, acibenzolar-S-metil, fenilalanina amônia-liase, harpina, resistência sistêmica adquirida. Induction of resistance to brown-rot on peaches by elicitors use in post-harvestAbstract -The objective of this work was to evaluate the effects of acibenzolar-S-methyl and harpin protein elicitors, applied in post-harvest, in systemic resistance induction to brown-rot, on peaches. A completely randomized design was utilized, with four replicates, in a split plot scheme -injured or noninjured peaches -, and treatments were constituted of : acibenzolar-S-methyl (50 mg of a.i. L , in each side of the fruit). Sixty hours past inoculation, the size of lesions, esporulation and percentage of control were evaluated. The contents of total protein, total phenol, total and reducing sugar, besides activity of phenylalanine ammonia-lyase (PAL), were determined. The elicitors induce resistance to M. fructicola, with reduction in fungal development. Elicitor's increased the evaluated biochemical parameters and the activity of PAL, which was related to the size reduction of lesions in peaches. The elicitors could be used in integrated management of brown-rot, in post-harvest applications.

Bacterial leaf spot (BLS), caused by Xanthomonas arboricola pv. pruni, is one of the most important diseases in Brazilian peach [Prunus persica (L.) Batsch] orchards and all over the world. The main objective of this study was to evaluate for BLS sensitivity of peach genotypes. Evaluations of thirty genotypes were carried out during the onset of the disease, for incidence, severity and defoliation, in field conditions.

The fig is one of the most perishable fruits during the postharvest phase, which has prompted studies to evaluate the effects of substances applied on figs after harvest in order to extend their postharvest life. The aim of this work was to evaluate the effects of different concentrations of 1-methylcyclopropene (1-MCP) on the postharvest quality of Roxo de Valinhos figs. The research was conducted by applying 4 concentrations of 1-MCP (0 -control, 5, 10, and 20 µg L -1 ) on figs, after which the fruits were evaluated at five different storage times (0, 4, 8, 12, and 16 days). The results showed that 20 µg L -1 of 1-MCP provided the best fruit firmness at day 12 after harvest. The 1-MCP treatments did not improve the total amount of total soluble solids (TSS), but we observed higher amount of total solids from 12 to 16 days of storage. Higher acidity was observed in the figs without a 1-MCP treatment at 8 days of storage and with 20 µg L -1 of 1-MCP after 12 days of storage. 1-MCP did not affect fruit weight loss. The figs treated with 1-MCP showed promising and rising values of firmness, acidity, and TSS at the highest dose. The TSS concentration tended to increase at the higher doses. As a result, it could be interesting to assay this substance with applications with higher concentrations than those used in the present study. Additional key words:Ficus carica, 1-MCP, firmness, soluble solids, titratable acidity, weight loss. fig, which rapidly decreases the quality of the fruit after harves, because it is subject to rapid physiological breakdown. This characteristic affects the efficiency of the commercialization and exportation of the fruit around the world (Gözlekçi et al., 2008;Paula et al., 2007;Sharma and Singh, 2013). The postharvest life of the fresh fig fruit is normally 7-10 d even when it is stored under low temperatures (Ozkaya et al., 2014).Some studies have been conducted to investigate the effects of substances applied on figs to improve its postharvest conservation, such as calcium chloride, fungicides, sodium hypochlorite, and 1-methylcyclopropene (1-MCP) (Gözlekçi et al., 2008;Irfan, 2013;Paula et al., 2007;Watkins, 2008). 1-MCP is an unsaturated cyclic olefin that acts as a competitive ethylene antagonist, i.e. it blocks ethylene receptors and can be used to control ethylene production, respiration rate, and softening and extends the shelf-life of a wide range of fruits (Freiman et al., 2012;Sozzi et al., 2005;Terra et al., 2014;Watkins, 2008). However, 1-MCP applications on fruits may not always have similar results on the postharvest quality since its effect has been shown to vary according to the climacteric fruit species, cultivar, maturation and ripening stages of the fruit, and 1-MCP application forms (Freiman et al., 2012;Sozzi et al., 2005; Watkins, 2006;Zhang et al., 2017).There are few reports on the postharvest behavior of figs treated with 1-MCP. Gözlekçi et al. (2008) showed that 10 µg L -1 of 1-MCP slowed the softening of Bardakci figs and retained fruit firmness during...

Studies on adaptation to the cultivation site are necessary for the recommendation of new cultivars. The aim of this study was to evaluate the phenological development, productivity and fruit quality of eight blueberry cultivars from the rabbiteye group (Aliceblue, Bluebelle, Bluegem, Briteblue, Climax, Delite, Powderblue and Woodard) and two from the highbush group (Georgiagem and O'Neal) under humid subtropical conditions in the 2012/2013, 2013/2014 and 2014/2015 cycles. Beginning and end of flowering, beginning and end of harvesting, fruit set, production, mass, diameter, pH, content of soluble solids, titratable acidity, ratio and coloring were evaluated. The evaluated cultivars presented flowering in the period from July to September, concentrating harvest in the months of November and December. The highest fruit set was observed in Delite, Climax, Briteblue and Powderblue cultivars. There were differences among cultivars regarding fruit mass, size, pH, content of soluble solids and acidity. The results showed that the cultivars exhibited blue color with few variations over the evaluation years. Cultivars with the best productive performance under humid subtropical climate conditions are Bluegem, Delite, Climax and Powderblue. Index terms: Vaccinium sp., small fruits, fruit set. Fenologia, produção e qualidade de mirtilos produzidos em clima subtropical úmidoResumo -Para a recomendação de novas cultivares, são necessários estudos quanto à adaptação no local de cultivo. Logo, objetivou-se avaliar o desenvolvimento fenológico, a produtividade e a qualidade de frutos de oito cultivares de mirtileiro do grupo rabbiteye (Aliceblue, Bluebelle, Bluegem, Briteblue, Climax, Delite, Powderblue e Woodard) e duas do grupo highbush (Georgiagem e O'Neal) em condições de clima subtropical úmido, nos ciclos de . Foram avaliadas as datas do início e do final de floração, início e final de colheita, frutificação efetiva, produção, massa, diâmetro, pH, teor de sólidos solúveis, acidez titulável, ratio e coloração. As cultivares avaliadas apresentaram floração no período de julho a setembro, concentrando a colheita nos meses de novembro e dezembro. As maiores frutificações efetivas foram observadas nas cultivares Delite, Climax, Briteblue e Powderblue. Houve diferenças entre as cultivares quanto à massa do fruto, tamanho, pH, teor de sólidos solúveis e acidez. Os resultados demonstraram que as cultivares exibiram coloração azul, com poucas variações ao longo dos anos de avaliação. As cultivares com melhor desempenho produtivo, em condições de clima subtropical úmido, são Bluegem, Delite, Climax e Powderblue. Termos para indexação: Vaccinium sp., pequenas frutas, frutificação efetiva. 2 J. G. S. Medeiros et al. Rev. Bras. Frutic., Jaboticabal, 2018, v. 40, n. 3: (e-520)

Evaluation of yield performance is important to find the most adapted blueberry cultivars in a particular region. This research aimed to evaluate the flowering and hasvesting periods, the production per plant, and fruit quality of eight rabbiteye blueberry cultivars (Aliceblue, Bluebelle, Bluegem, Briteblue, Climax, Delite, Powderblue, and Woodard) and two highbush blueberries (Georgiagem and O’Neal), in mild winter conditions in Pinhais-PR. Flowering and harvesting periods, production, berry weight, size, pH, soluble solids, titratable acidity, ratio and color of the fruits were evaluated in the 2013/2014 and 2014/2015 growing seasons, when the plants had two and three years old, respectively. Cultivars flowered from August to September, and harvest was concentrated in November and December. Berry weight, size, pH, soluble solids and acidity varied among the cultivars. The average ratios of 14.97 and 13.39 for each crop proved that the cultivars have good fruit quality. There was little variation in fruit color in the two years evaluated. Blueberry cultivars showed the staining characteristics and physical and chemical attributes of quality compatible to blueberry from other traditional regions. Under mild winter conditions, young plants of rabbiteye blueberry cultivars, Climax, Delite, Bluegem and Powderblue, are the most productive, while the highbusch cultivars bear few fruits.