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Estudou-se o efeito da infiltração de magnésio e cálcio no desenvolvimento de sintomas de bitter pit de maçãs 'Gala'. Examinou-se, também, a eficiência da infiltração de magnésio e da aceleração da maturação de maçãs 'Royal Gala' como métodos de previsão da ocorrência de bitter pit após o armazenamento. No primeiro experimento, maçãs 'Gala' foram infiltradas com MgCl2; CaCl2 ou MgCl2 mais CaCl2. No segundo experimento, maçãs 'Royal Gala' foram infiltradas com MgCl2; ou imersas em solução contendo ethephon por cinco minutos. Como controle, frutos de cada cultivar foram armazenados em atmosfera controlada por seis meses mais 18 dias a 20°C. Frutos infiltrados com MgCl2 apresentaram significativo acréscimo na incidência e severidade de bitter pit, proporcional à concentração de MgCl2 na solução. Frutos infiltrados com CaCl2 não apresentaram sintomas de bitter pit. A aceleração da maturação de maçãs 'Royal Gala' na colheita foi efetiva na previsão de bitter pit após o armazenamento.The effect of magnesium and calcium infiltration on bitter pit symptoms development in Gala apples was studied. It was also examined the efficiency of magnesium infiltration and the ripening hastening of Royal Gala apples as a predictive methods of bitter pit occurrence after storage. In the first experiment, Gala apples were infiltrated with MgCl2; CaCl2; or MgCl2 plus CaCl2. In the second experiment Royal Gala apples were infiltrated with MgCl2; or immersed into solution containing ethephon during five minutes. As a control a sample of each cultivar was stored in controlled atmosphere during 6 months plus eighteen days at 20°C. Fruits infiltrated with MgCl2 showed increased incidence and severity of bitter pit proportional to the MgCl2 concentration in the solution. Infiltration with CaCl2 prevents bitter pit-like symptoms. The ripening hastening of Royal Gala apples at harvest was effective on the bitter pit prediction after storage.

The effect of magnesium and calcium infiltration on bitter pit symptoms development in Gala apples was studied. It was also examined the efficiency of magnesium infiltration and the ripening hastening of Royal Gala apples as a predictive methods of bitter pit occurrence after storage. In the first experiment, Gala apples were infiltrated with MgCl2; CaCl2; or MgCl2 plus CaCl2. In the second experiment Royal Gala apples were infiltrated with MgCl2; or immersed into solution containing ethephon during five minutes. As a control a sample of each cultivar was stored in controlled atmosphere during 6 months plus eighteen days at 20°C. Fruits infiltrated with MgCl2 showed increased incidence and severity of bitter pit proportional to the MgCl2 concentration in the solution. Infiltration with CaCl2 prevents bitter pit-like symptoms. The ripening hastening of Royal Gala apples at harvest was effective on the bitter pit prediction after storage. [ABSTRACT FROM AUTHOR]