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A. Percentage of ill filled grains are more in the case of varieties (Mordan) compared to hybrids. It might be due to high cross pollinated nature of OPVs to over come this rubbing the heads with thin cloth in circular manner between 8 A.M – 11 A.M. Spray Borax 2% solution at the stage of heading. To increase the population of bees planting of mustard as a border crop is advisable.
