Field observations are used to make immediate IPM decisions as well as record part of the field's history for making rational decisions in the future. Identification Properly identifying pests is an important aspect of scouting. Natural enemies that help keep pest in check are also present in fields, so it is important to recognize these friends. For example, certain insects, such as Syrphid flies, may be abundant in a field but do not cause crop damage. Knowledge of specific insects, weeds, or disease in a field is important for IPM decision-making.
Pest levels can vary greatly from one field to another.
Each individual field should be scouted thoroughly without bias even though the fields may appear similar. In the third step, scouts analyze information obtained from scouting and pest identification and determine the need for pest control. One question is whether or not the damage potential is more costly than the control cost. The economic threshold plays an important role in IPM decisions and is defined as when there are enough pests present to warrant treating the crop. Keep in mind that economic thresholds are developed for average conditions.