How do I stop yellow patches appearing on the leaves of lettuce plants?
Posted by Dobies Staff on 18 November 2014 02:25 PM
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Lettuce downy mildew is a common disease which attacks seedlings in spring and late in the season on mature plants. Attacks can occur on greenhouse crops or plants growing outdoors. This disease is more likely to be seen in wet seasons.
Keep water off the leaves of plants grown in the greenhouse and avoid watering late in the day, ventilating whenever possible to ensure good air movement around the plants. Outdoors remove affected plant material and allow as long as possible between lettuce crops.
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