Pre-harvest lenticel spot of apples

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Abstract
An investigation was made of lenticel spot which develops prior to harvest on Sturmer and Golden Delicious apples. Fungi pathogenic to apples were isolated from only a small proportion of spots, and few spots developed into rots when fruit was held in store. Saprophytic species, e.g., Stemphylium botryosum and Ulocladium consortiale, were isolated from the majority of spots. Fungicides applied through summer reduced the amount of pre-harvest lentical spot, indicating that the spots were caused by fungi. It is concluded that the death of apple tissue under lenticels, constituting pre-harvest lentical spot, is caused by saprophytic fungi which make limited growth in the cavities on the fruit surface.

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