Factors to Consider When Choosing a Product for Corn Rootworm Protection*
Insecticide Class
Organophosphates**
Pyrethroids
Fiproles
Nicotinoids
Chemical Name
chlorethoxyphos
chlorpyrifos
tebupirimphos & cyfluthrin
terbufos
bifenthrin
tefluthrin
tefluthrin
fipronil
imadicloprid
Trade Name & Formulation(s)
Fortress 2.5G
Fortress 5G
(SmartBox)
Lorsban 15G
Lorsban 4E
generics
Aztec 2.1G
Aztec 4.6G
(SmartBox)
Counter CR
Capture 2E
Force 3G
ProShield (treated seed)
Regent 4SC
Prescribe
(treated seed)
Factors:

Performance: test plots-
band application
  Root damage rating(1)
  Consistency of performance (%)(2)
Fortress 5G

2.9
73
Lorsban 15G

2.7
82
Aztec 2.1G

2.2
94
Counter CR

2.2
94
Capture 2E

--
--
Force 3G

2.3
100
n/a
n/a
n/a
Performance: test plots - infurrow application
  Root damage rating(1)
  Consistency of performance (%)(2)
Fortress 5G

2.7
83
Lorsban 15G

2.6
85
Aztec 2.1G

2.2
91
Counter CR

2.4
85
n/a
Force 3G

2.1
100
n/a
Regent 4SC

2.7
93
n/a
Performance: test plots -
treated seed
  Root damage rating(1)
  Consistency of performance (%)(2)
n/a
n/a
n/a
n/a
n/a
n/a
ProShield

--
--
n/a
Prescribe

--
--
Technical information
  Registered for use at cultivation
  Registered for popcorn/seed corn/sweet corn
  Human hazard (signal word)
    Granular formulation
    Liquid formulation
   Restricted-use pesticide
  Labeled for control of other soil
    pests at the rootworm rate(3)
      billbugs
      cutworms
      nematodes
      seedcorn beetle
      seedcorn maggot
      white grubs
      wireworms

N
PES


D
n/a
Y

N
Y
N
N
Y
Y
Y

Y
ES


C
W
N

Y
Y
N
Y
Y
Y
Y

N
PES


W
n/a
Y

N
Y
N
Y
Y
Y
Y

Y
PES


D
n/a
Y

Y
N
Y
Y
Y
Y
Y

N
PE


n/a
W
Y

N
Y
N
Y
Y
Y
Y

N
PES


C
n/a
Y

N
Y
N
Y
Y
Y
Y

n/a
ES


n/a
n/a
N

N
N
N
N
Y
Y
Y

N
E


n/a
W
Y

N
N
N
Y
Y
Y
Y

n/a
E


n/a
n/a
N

N
N
N
N
Y
Y
Y

*Key to symbols: -- = inadequate information, n/a = not applicable, D = danger, W = warning, C = caution, Y = yes, N = no, P = popcorn, E = seed corn, S = sweet corn.
**See "Insecticide/Herbicide Plant Interaction" on page 5
(1)Average root damage rating (Hills and Peters 1-6 scale) in 11-19 tests over five years (1997, 1999, 2000, 2001, 2002), where damage in the untreated plots exceeded 3.5 or greater will likely predispose plants to significant yield losses. The untreated plots averaged 4.79.
(2)Percentage of root masses where damage rating was less than or equal to 3.0 when the untreated equaled or exceeded 3.5. Tests from 1997, 1999, 2000, 2001, 2002.
(3)Insecticide not included if label states “for suppression,” “reduction of,” “aids in control,” or “control of light to moderate infestations only.”
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