Kozmin (1979) classified all the impurities present in the wheat into three groups. First group contains poisonous admixtures and that also causes the deterioration in quality of flour color and baking. Ergot, cockle belongs to this class. Second group contains those impurities, which reduces the quality of flour such as the seeds of non-poisonous plants, dust, dirt etc. and third category that may do some damage to the machinery such as stones and pieces of metal.