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Canola and Yellow Mustard Response to Hail
Canola and mustard plantings in the seedling stage can have stands reduced to 1/3 of normal and produce acceptable yields. Plants hailed prior to flowering suffer yield loss because of loss of leaf area (the crop will still produce 60-80% of normal yield if enough material is available for regrowth.). Seed yield loss in canola is 25% of percent of leaf area lost.
Plants injured in early flowering seldom die, however, yield loss can be severe. Early maturing canola (B. campestris) that is similar to yellow mustard in maturity suffers increasing yield loss as flowering progresses. Plants that have been flowering 7-14 days will have yield losses due to hail equal to percent of branches lost. If 70% of branches are lost, 60-70% of yield will also be lost.
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