Bi-Weekly Weed Survey of Yuma County starts today
A Bi-Weekly survey of weeds of agricultural areas in Yuma County began two weeks ago and is reported in today’s edition of the IPM Updates. Survey results will continue to be reported in Vegetable IPM Updates every two weeks. This survey was initiated and will be conducted by Marco Pena.
The purpose of the survey is to provide information to help you make weed management decisions and will include weed species, location and infestation level. Twenty four points have been marked for sampling. They are distributed from San Luis to Texas Hill. A three to five acre radius will be surveyed around each point. Results will be reported on an aerial photograph of the county. A separate map will be provided for each species found. We know that we can’t find every weed out there across the county and will make an interactive map so that you can include infestations that we have missed. Just send us an image of the weed species and the GPS location from your phone and we will add it to the map.
We hope that this will be ongoing project that will alert you to what weeds we have found and create an historical perspective for changes over time. We will be adding more species as the project continues and we appreciate your input on how this program can be modified and improved so please let us know what you think.
The scale used on this survey for the infestation level on each weed is color coded as follows:
Color Code |
Infestation Level |
Plants / acre |
White |
ND: Not Detected |
0 |
Blue |
P: Present |
1-3 pl/ac |
Yellow |
L: Low |
4-50 pl/ac |
Orange |
M: Medium |
51-200 pl/a |
Red |
H: High |
Above 200 pl/ac |
The following image contain the location of our 24 sampling points. To access all the Yuma county weed maps with other species including some that weeds found to host the INSV virus please visit Spatial Distribution of weeds in Yuma County.