Loss of photosynthetic area and, in some instances, failure to produce heads contributes to yield loss. Diagnosis Take representative soil samples at 0-15 cm and check them for manganese availability. Management Strategy Use oat varieties known to be tolerant to manganese deficiency. Grow wheat and barley, which are less affected by this deficiency. Spraying the crop with 1 percent manganous sulphate can reduce losses.
Soil apply manganese fertilizer.
Grey speck - greyed to brown lesions or spots on oats and barley caused by severe manganese deficiency in soils from pH 6 to 8 particularly in dry seasons. A yield limiting micronutrient deficiency. The user of this information agrees to the terms and conditions in the copyright and disclaimer . Her Majesty the Queen in the Right of Alberta. All rights reserved.