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What is this on Tomato Leaves? | |
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| | It is rare to see this condition on tomatoes. I saw this one after a few years. Most of the newer cultivars don’t show these types of symptoms. It is called edema. A grower reported this in just the end row of the greenhouse, and it happened during the very cold weather. You may still remember we had temperatures over minus 40 not long ago, and the air temperature around this row of plants did dip to 12C for some time.
When the night temperature drops that low, especially quickly, then the roots are still pumping water and leaves get cooler, so cells burst open and cell juices callus around those areas. Generally the cell juices have E.C. around the same level as feed E.C. so they may cause physical burning. The plants recovered and not yield loss is expected. Growers may watch for botrytis developing on those spots.
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For more information about the content of this document, contact Mohyuddin Mirza.
This document is maintained by Linda Thomas.
This information published to the web on April 10, 2008.
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