Saturday, January 21, 2012

Cucumber - yellow spots on leaves

Cucumber leaves - yellow blotches
January 2012 - Lebanese cucumbers growing really well but the leaves have yellow spots that take over. Apparently this is caused by the bacteria Pseudomonas syringae and is common on cucumbers.
The bacteria lives on plant debris so it's important to keep the area clear of old leaves etc. The bacteria stays in the soil, so rotating the cucumbers to another bed next summer may be an option.
Sadly, there isn't any way to get rid of it once it has made itself at home. As with marrows and cucumbers, it's important to keep the leaves dry to halt the onset of any diseases so watering early in the morning is important. Likewise, only pick the fruit when plants are dry to slow down the spread of the disease.
Interestingly, the harvest is the best I've had in recent years from cucumber plants, so I'm not despairing! 

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