6 Weed and Disease Mapping

    During one of the last visits to the field before harvest, draw a disease and weed map. Use an Agricultural Stabilization and Conservation Service map (if available) to mark infested areas. If a map is not available, draw an outline of the field and circle the location of trouble spots that have been identified. On each circle, note diseases or weeds found and the level of infestation. Do not try to identify each specific spot observed but the general area of the field in which the problem occurred. This map will help in planning weed management programs for subsequent crops.   For several pests and for certain agronomic problems, the stage of growth is important.