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2005 California Desert Exotic Mustard Roadside Survey

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I-10 PM 84 Riverside County at Hayfield Road exit, mustard density into desert. Photo 5/18/095


I-10 PM 105 and Junction Cal. 177 Riverside County, showing density of mustard into desert, still very scattered. Photo 5/18/05

Results of a 70 mph windshield survey (or whatever the local speed limits were), of Sahara mustard (Brassica tournefortii): Either not present; is present along roadsides or in medians; or is outside of the roadside to the fence line or has moved from the roadsides to infest adjacent land.

NS = No Sahara mustard was seen along roadside ditches; or if divided highway, also not seen in the roadside median, or in lands adjacent to the road.

RS = Road Sides were infested with Sahara mustard. MED = In divided highways, in medians.

DES = Sahara mustard has moved from the roadsides into the desert, agricultural areas, or other lands adjacent to the roadsides. FL = Only found along the highway cyclone-fence line, but is far enough off the roadside to pose an immediate problem for the lands adjacent to the fences. At the time of the survey, did not appear to be moving off the fence line yet.

SPECIES SURVEYED for:

BT = Brassica tournefortii or Sahara Mustard

PM = Post miles along highways, and numbers indicate the averages found not just at each post mile, but for 1/2 mile on either side of the post mile marker.

(Landmarks and other notes on other exotics or native plants will be in parentheses)

Survey 5/18/2005, data to be posted later, notebook 194, pages 10-11

(Post miles)

81 - RS MED rare
82 - DES scattered to thick out one mile
83 - DES scattered to thick out one mile
84 - DES thick out 1/4 mile
85 - DES thick out 1/4 mile
Chiriaco Summit
86 - DES scattered
87 - DES scattered out 1/4 mile
88 - DES scattered out 1/4 mile
89 - DES scattered out 1/2 mile - Hayfield Road exit
90 - DES thick out 1/2 mile on either side of highway
91 - DES thick out 1/2 mile on either side of highway
92 - DES thick out 1/2 mile on either side of highway
93 - DES thick out 1/2 mile on either side of highway
94 - DES thick out one mile on either side of highway
95 - DES solid 1/4 mile out
96 - DES scattered to thick 1/4 mile out
97 - DES scattered 1/4 mile out
98 - DES scattered 1/8 mile out
99 - DES scattered 1/8 mile out
100 - DES scattered 1/8 mile out
101 - DES scattered 1/8 mile out
102 - DES rare - Eagle Mountain Road exit
103 - DES rare
104 - DES rare
105 - DES rare - Junction Desert center

Junction of Cal. Hwy. 177

Updated December 24, 2022 - The Reveg Edge Ecological Restoration service