GENERAL43497

• Permit No: C1981010
• IBM Index Class Name: General Documents
• Doc Date: 12/19/1986
• Doc Name: MID TERM REVIEW SHRUB DENSITY STANDARD FOR RANGE SITES A AND B
• From: TRAPPER MINING INC
• To: MLRD
• Permit Index Doc Type: VEGETATION
• Media Type: D
• Archive: No

i
ti
i

a
.,

~ C ^1
~ -0
2
° L H
v o a
rt
ti. ,., ~ ~
ry L U
~J VI
Species Chemical ¢ r cg RemarY.s 1/
Rabbitbrush 2,4-D FS 5-I Rabbitbrush (Chrysothamnus spp): Low growing
(Chrysothamnus species) Bromacil BS 5 species are a problem in the San Luis Valley
N
N ST 5 and throughout western Colorado. Distribution

w

Dicamba

FS 5-I •

of tall species is mainly in the western two-
Dichlorprop FS R thirds of the state. Chemical control of
Picloram FS R rabbitbrush has given varied results. There
are about 10 important species of rabbitbrush.
Ta11 rabbitbrush 2,4-D FS 5 Species vary in susceptibility to 2,4-D.
(Chrysothamnus There is a definite tendency of some species
nauseosus) to sprout from the base or from the aerial
Farts of the plant even though a hiyh
Sticklead Iow rabbit- Karbuti_'ate BS 5 percentage of leaves are killed by the spray.
brush (C. viscidi-
florus) 1. Cround Spray. 2,9-D ester or amine (refer
to label).
Lora Douglas rabbitbrush 2,4-D FS 5 2. Dicamba (refer to label).
(C. viscidiflorus vat. 3. Dicamba and 2,4-D (refer to IabeZJ.
stenophyllus)
Burning the area and spraying the re sprouts
o gives excellent kills. Spray when rabbitbrush •
~ is growing vigorously and in bud stage. (This
h is generally when moisture conditions in the
J
o
upper 12" of soil are s~rch to insure at least
30 days of vigorous growth prior to
n spraying.)

ti
Limited information indicates that rabbitbrush
~ can be controlled with 2 pounds (2.3 kg, ha) of
2,4-D ester in 10 gallons (95 1/ha) of water
~
~ with a wetting agent, or 5 gallons (47.5 1/ha)
~ of diesel oil per acre (ha). Apply in early
summer after new twig growth exceeds 3 inches
(8 cm) and when soil moisture is adequate.
Proper timing seems critical. The best time