Brooks spot

Mycosphaerella pomi

 Brooks spot first appears as irregular, slightly sunken dark green lesions typically on the calyx end of immature apple fruit. As the fruit matures, the lesion turns dark red or purple on red areas of the fruit and remains dark green on green or yellow areas. The disease is sometimes confused with the physiological disorders Jonathan spot, cork spot, and bitter pit. However, Brooks spot usually appears earlier in the season and shows little browning of the flesh underneath the lesion. Jonathan spot lesions are usually more round and the lesion edge is more abruptly sunken, with a shallow browning of the flesh underneath.

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