Some features of this website require Javascript to be enabled for best usibility. Please enable Javascript to run.

Click here to return to scouting

The periods of pest and beneficial activity illustrated below are general guidelines based upon both Ontario field experience and pest biology research. The actual period of activity for any given pest will vary significantly from year to year, depending on over-wintering conditions; seasonal temperature accumulation; relative humidity; rainfall; prevailing wind patterns; and other environmental factors.

Click on an insect, disease or beneficial for more information.