All varieties in cross pollinated crops produce a proportion of weak and undesirable plants in each generation. The aim of roguing (removal of weak, diseased or non-normal plants) is to reduce the incidence of poor plants and also detect and remove off-type plants which have resulted from outcrossing. The amount of roguing necessary varies with the stage of multiplication. Intense roguing should be done in the breeder's plots (which are relatively small in size and can be fully surveyed everyday during flowering). Three or four roguings should be done on basic seed plots but very little roguing (apart from removing diseased plants) is practical in certified seed plots.
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|Origin And Botany | Varietal Development And Maintenance | Land Selection | Land Preparation | Planting | Fertilization | Weed Control | Thinning And Gap-Filling | Roguing | Plant Protection | Harvesting And Threshing | Field Inspection|