Cotton

Pest Management Guidelines

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Flowers of morningglory, Ipomoea sp. range from violet to red.

Susceptibility of Weeds in Cotton to Herbicide Control

(Reviewed 5/13, updated 5/13)

In this Guideline: More about weeds in cotton:
Customize LIST OF WEEDS PREEMERGENCE POSTEMERGENCE
ANNUAL WEEDS DIU MEO MET* OXY PEN PRM TRI CAR CLE FLM FLU GLU GLY MSM PAR* PRS PYR SET
barley, foxtail — — — — — — — N — — — — — — — — N —
barley, hare C P C P C P C N C — C — C N C N N C
barnyardgrass C C C P C N C N C C P P C N N N N C
bluegrass, annual C C C P C C C N C C N C C C C N N N
bromegrasses C — C P C N C N P — P C C P C N N P
canarygrass C C C P C P C N C — C C C N C N N C
chickweeds C C C P C C C C N C N C C C C — C N
clovers C N N C N C N — N C N C C N P N — N
cockleburs C — C P N C N P N — N C C P C C C N
crabgrass, large C C C C C P C N C C C C C N C N N C
cudweeds C N C P N P N — N — N C C N N N — N
cupgrasses C C C P C P C N C — C C C P C N N C
fescues C — C P C P C N P — P — C N C N N P
fiddlenecks C N C C C C C C N — N C C N C N C N
filarees C N C C P C P C N — N C P N P — — N
fingergrasses C — C — — P C N C — C — C C C N N —
fleabane, hairy C N C P N C N N N C N C N N C — N N
foxtails (bristlegrass) C C C P C C C N C — N C C P C N N C
goosefoot, nettleleaf C P C C C C C — N — N C C N C C — N
groundcherries C C C C N C N C N C N C C P C P C N
groundsels C N C C N C N C N C N C C N C — C N
henbit N — C C P C P — N C N C C N C — — N
horseweed C N C P N C N P N C N C N N C — P N
junglerice C C C P C P C N C C C C N N P N N C
knotweed, common C N C C C C C — N — N C C N P C — N
lambsquarters, common C P C C C C C C N C N C P N P N C N
lettuce, prickly C — C C N P N — N — N C C N C N — N
lovegrasses C C C P C P C N C — C — C N C N N C
mallow, little (cheeseweed) P P C C N P N C N C N C P N N N C N
miner's lettuce C — C C C C C — N — N — C N C — — N
morningglory N N C P N P N C N C N C C P P P C N
mustards C N C C N C N P N — N C C N C C C N
nettles C C C C P C P C N C N C C N C P C N
nightshades C C C C N C N P N C N C C P C C C N
oat, wild P N C P N P N N C C C C C N P N N C
pigweeds C C C C C C C C N C N C P N C C C N
pineapple-weed C — C P N C N N N — N C C N C — — N
polypogon, rabbitsfoot C C C P C C C N C — C — C N C N N C
puncturevine N — C P P P P — N C N C C P C P — N
purslane, common C C C C C C C N N C N C C P C P C N
radish, wild C N C C N C N P N — N C C N P — — N
redmaids C — C C C C C — N C N — C P C — — N
rocket, London C N C C N C N C N — N C C N C C — N
ryegrasses C C C P C P C N C — C — P P C N N C
sandburs N C C N C N C N C — C C C C C N N C
shepherd's-purse C P C C N N N P N C N C C N C C — N
sowthistles C P C C N C N N N C N C C N C — C N
speedwells N — C C P C P N N — N — C N C — — N
sprangletops N C C P — N C N C — C C P N C N N C
spurges N N C P N P N P N — N C C N C N N N
sunflower, common C N P C N C N — N — N C C N P C — N
thistle, Russian N P C P P P P — N — N C C C P N — N
thornapple, Chinese — — — — — — — — — — — — — — — — — —
velvetleaf — P C — N — N C N — N C C P C C C N
witchgrass C — C P C P C N C — C C C P C N N C
PERENNIAL WEEDS
bermudagrass (established) N N P N N N N N P — P P P N N N N P
bermudagrass (seedling) N N C N C P C N C — C P C N P N N C
bindweed, field (established) N N P N N N N P N N N P P N N P P N
bindweed, field (seedling) P N P N N P N C N N N P C C C P C N
datura, sacred N — P N N N N — N — N — C N C P — N
johnsongrass (established) N N P N N N N N C — C P C P N N N C
johnsongrass (seedling) N C P N P N P N C — C P C C C N N C
knapweed, Russian N — P N N N N — N — N — P N N — — N
nightshade, silverleaf N N P N N N N — N N N — P N N P — N
nutsedge, purple N N P N N N N N N N N P P P N N N N
nutsedge, yellow N P C N N N N N N P N P P C N N N N
sida, alkali N — P N N N N — N N N — P N N N — N

Ratings Legend
C= control P= partial control N= no control —= no information

Chemical Legend
CAR = carfentrazone (Shark) MSM = MSMA
CLE = clethodim (Select Max) OXY = oxyfluorfen (Goal)
DIU = diuron (Karmex) PAR = paraquat* (Gramoxone Inteon)
FLM = flumioxazin (Chateau) PEN = pendimethalin (Prowl)
FLU = fluazifop-p-butyl (Fusilade) PRM = prometryn (Caparol)
GLU = gluphosinate (Rely) PRS = pyrithiobac sodium (Staple)
GLY = glyphosate (Roundup) PYR = pyraflufen ethyl (ET)
MEO = metolachlor (Dual Magnum) SET = sethoxydim (Poast)
MET = metam sodium* (Vapam) TRI = trifluralin (Treflan)

Comments
* Permit required from county agricultural commissioner for purchase or use.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Cotton
UC ANR Publication 3444

Weeds
  • S. D. Wright, UC Cooperative Extension, Tulare County
  • D. J. Munier, UC Cooperative Extension, Glenn County
Acknowledgment for contributions to Weeds:
  • R. N. Vargas, UC Cooperative Extension, Madera County
  • T. S. Prather, Plant, Soil, and Entomological Sciences, Univ. of Idaho, Moscow, Idaho

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