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Cal. 98 PM 53 Imperial County east of Mexicali invasion starting along the roadside, at the edge of hundreds of square miles of vulnerable overgrazed creosote desert shrubland.

Cal. 98 PM 13.5 Imperial County at the BLM Yuha Desert area, mustard getting ready to cover the desert. Photo. 5/18/2005.

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 5/17/2005, notebook 193, pages 47 and 194, pages 3-4.

(Post Miles)

0 - NS
Start - BLM Yuha Desert
1 - NS
County S-22 to Interstate 8 junction, to town of Ocotillo.
2 - NS
3 - NS
4 - DES in abandoned ag. fields.
5 - RS scattered, thick in spots.
6 - RS very rare.
7 - RS very rare.
8 - RS rare.
9 - RS one single plant.
10 - NS
11 - RS rare, south side.
12 - RS thick south side.
13 - RS thick along south side.
14 - RS rare.
15 - RS scattered.
16 - DES scattered in wash.
17 - RS scattered.
18 - RS in ditches and edge, rare.
19 - RS in ditches and edge, scattered.
BLM Yuha Desert--ORV use may be scattering plants.
20 - RS rare in creosote.
21 - NS
22 - NS - canal.
Drew Road to Town of Seeley
23 - NS - Agriculture lands.
24 - NS - Brockman Road.
25 - NS - Ag.
26 - NS - Ag.
27 - NS - Ag.
28 - NS - Ag.
29 - NS - New River.
30 - City of Calexico
31 - City of Calexico
32 - City of Calexico
33 - City of Calexico
34 - NS - Ag.
35 - NS - Ag.
36 - NS - Ag.
37 - NS - Ag.
38 - NS - Ag.
39 - NS - Ag.
40 - NS - Ag.
Alamo River, New California Highway 7
41 - NS - Ag.
42 - NS - Ag.
43 - NS - Ag.
44 - NS - Ag.
45 - NS - Ag.
46 - NS - Desert
47 - NS - Ag.
48 - NS - Solid Schimus
49 - NS - Solid Schimus
50 - NS - Solid Schimus
51 - NS - Solid Schimus
52 - NS - Creosote dead.
53 - RS scattered.
54 - RS scattered.
55 - RS scattered, ditch
56 - RS rare, creosotes mostly dead
57 - RS scattered.

Junction of Interstate 8

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