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Raspberry discolouration

Raspberry    Mallorca

I have been growing raspberries and other soft fruits for many years in Rhodesia and UK but now being in Mallorca, my raspberries have a strange discolouration on the fruit (see attached photo). They are grown in full sun and are irrigated gently daily for at least an hour. The soil dries quickly.
Is this a case of "sunburn" or some other problem?


Posted by: Brian Gatcombe (1 point) Brian Gatcombe
Posted: July 26, 2015




Answers

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This looks like sun scald to me. Sunscald is often exacerbated by high temperature and drought

Sunscald symptoms will appear as yellow or white lesions on foliage and/or fruits. The lesions eventually may turn brown and/or shrivel. Note that once damage occurs, other soft rots (e.g. from bacteria) may invade the fruit to cause further damage.

How to control. An extension document from Purdue University states:
"Encouraging healthy foliage by proper positioning in the garden, appropriate fertilization, pruning and pest control can help prevent sunscald on garden plants. Using tents or screens to provide light shade in late afternoon may also help. Moving susceptible perennials and shrubs to more-protected locations, particularly away from the afternoon sun, may be warranted."

http://www.hort.purdue.edu/ext/sunsca...


Posted by: David Hughes (43 points) David Hughes
Posted: July 27, 2015




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