Nevada Weed Management Association, PO Box 150033, Ely NV 89315
Nevada Weed Management Association

Early Detection Rapid Response (EDRR)


Early detection and rapid response (EDRR) is the second most important  action one can take after prevention. Early detection and rapid response  is built upon two principles: 1) Detect and identify an invasive  species as early as possible and 2) Immediately contain and eliminate  the invasive species and its threat of invasion.

The EDRR approach is beneficial both environmentally and economically  because eradicating an invasive species before it can become well  established saves money, time, resources and landscapes. Early detection  of new infestations, however, requires vigilance and regular monitoring  of an area and its surrounding ecosystem. A successful EDRR program  consists of monitoring, inventory development, treatment and  post-treatment monitoring. It is imperative that monitoring is conducted  regularly and methodically to achieve the greatest level of success.


One of the primary tools in managing noxious weeds is identifying the  location and extent of infestation. Mapping these sites allows weed  managers and landowners to identify areas that need control actions  taken, locate areas threatened by potential spread, determine how and by  what methods the weeds are spreading and help determine the financial  and environmental costs to be incurred.

The first step in mapping weed infestations is to conduct surveys of  areas within the weed's potential range. This mapping can be done in the  form of intense, scientifically-based surveying performed by  professionals or by a landowner taking a walk through his or her  property and taking note of what plants are present. When a weed is observed its name and location should be noted, as well as any other  relevant information. If possible, it is best to collect a GPS point as  well. This information should be reported to the local Cooperative Weed  Management Area (CWMA), University of Nevada Cooperative Extension  office or federal land agency office to be included in a map of  infestations in the area.

Reporting and tracking invasive species is critical to protecting  environments threatened with infestation and for raising awareness in  communities. In order to appropriately detect invasive species prior to  establishment, information must be readily available to individuals  surveying and monitoring an area. 

Nevada is is a partner state using the Early Detection &  Distribution Mapping System (EDDMapS) app for use in reporting and learning  more about invasive plants found throughout the state. This invaluable tool is available to both invasive species professionals and the general  public and can be accessed here.

Relevant links

Download a pdf of the Nevada Weed Mapping Standards

Download an Excel file with a Mapping Datasheet Template

Download a pdf of standard Mapping Codes

If you have questions about EDRR, the mapping program or how to take charge of noxious weed management on your property contact NWMA or the Nevada Department of Agriculture.