The lawn area sprayed is based on survey results for lot size and an urban lawn area conversion factor of 0.6. A comparison of application rates between homeowners are professional lawn care indicates that lawn care companies apply more compounds than the homeowner, and at a greater frequency. Estimated applications of fungicides and herbicides used for crabgrass control are greater than other pesticides used in urban areas. This may warrant furthur investigation. Unfortunately analytical methods were not available for this study.
Bracketed values indicate detection limit.
Bracketed values indicate detection limit. Curved bracketed values indicate detection limit. Bracketed values indicate detection limits. 2 Persuald et al., 1992. 3 Detection limit.