Agronomic Crops

Fall
Armyworms
Insecticide
acephate (OP)
Orthene 90S
chlorantraniliprole (D)
Prevathon 0.43SC
Amount of
Formulation per Acre
1.1 lb.
14 – 27 oz.
Pounds Active
Ingredient per Acre
1.0
0.047 – 0.09
Acres 1 Gallon or
1 Pound Dry Will Treat
0.9
9 – 4.7
Comments
Some pyrethroids may help suppress fall armyworms when applied against newly hatched
larvae.
e growth regulator diflubenzuron (Dimilin) may also be useful in suppressing developing
fall armyworm populations (use rate is 0.0625-0.125 lb. ai/a).
flubendiamide (D)
Belt 4SC
2 oz.
0.0625
64
indoxacarb (OX)
Steward 1.25EC
9.22 – 11.26 oz.
0.09 – 0.11
13.88 – 11.37
Do not apply more than 3 oz. per 5-day interval. Do not apply more than three times per
crop season.
λ-cyhalothrin (P),
chlorantraniliprole (D)
Besiege
6.5 – 12.5 oz.
20 – 10
21 days PHI.
methomyl (C)
Lannate 2.4LV
24 oz.
0.45
5.33
A minimum of 10 days should elapse between 0.45 lb. methomyl (Lannate) applications.
e lower rate of methomyl (0.25 – 0.33 lb.) may be applied as needed. If reddening of
leaves is excessive, stop using the combination or alternate with other insecticides.
methoxyfenozide (IGR)
Intrepid 2F
6 – 10 oz.
0.09 – 0.16
21.3 – 12.8
methoxyfenozide (IGR)
+ spinetoram (SPN)
Intrepid Edge
4 – 8 oz.
32 – 16
Do not exceed 12 oz. per year.
novaluron (IGR)
Diamond 0.83EC
6 – 9 oz.
0.04 – 0.08
21.3 – 14.2
spinosad (SPN)
Blackhawk
2.4 – 3.2 oz.
0.054 – 0.072
53 – 40
Dual toxin Bt Cotton: Varieties of Bt cotton that express two Bt toxins are considerably more effective against fall armyworms than
are single-toxin Bt cottons but may still require supplemental treatments because of unusually high insect populations or compromised
toxin expression.
tHResHoLD: treat when you find four or more worms per 100 blooms and/or bolls. time applications against young larvae
and maximize coverage deep within the plant canopy by increasing spray volume and pressure.
Bandedwinged
Whiteflies
Insecticide
acephate (OP)
Orthene 90S
spiromesifen (TA)
Oberon 4SC
thiamethoxam (CN)
Centric 40WG
Amount of
Formulation per Acre
0.56 – 1.1 lb.
2 – 8 oz.
2 – 2.5 oz.
Pounds Active
Ingredient per Acre
0.5 – 1.0
0.94 – 0.25
0.05 – 0.0625
Acres 1 Gallon or
1 Pound Dry Will Treat
1.8 – 0.9
42.7 – 16
8 – 6.4
Comments
Large populations can reduce yield and affect quality.
orough coverage of foliage is necessary for adequate control.
Whiteflies can be difficult to control and can rebound quickly following treatment. Two to
three applications at approximately 5-day intervals are usually necessary to control heavy
infestations.
tHResHoLD: Apply control when 50 percent or more of the terminals are infested with adults.
Silver Leaf
Whiteflies
Insecticide
acetamiprid (CN)
Strafer 70WPS
Amount of
Formulation per Acre
3.0 – 3.5 oz.
Pounds Active
Ingredient per Acre
0.075 – 0.1
Acres 1 Gallon or
1 Pound Dry Will Treat
5 – 4.6
Comments
Begin applications prior to nymphal development.
pyriproxyfen
formulation (IGR)
Knack 0.86
8.04 – 9.97 oz.
0.054 – 0.067
15.92 – 12.84
When using non-IGR type treatments, you must make repeated applications at 5-day
intervals.
Infestations of sILVeR WHIteFLIes are uncommon but are most likely to occur on cotton grown close to nursery crops or greenhouses.
Heavy, prolonged infestations can cause substantial yield loss. is insect is difficult and costly to control.
tHResHoLD: Apply control when 50 percent or more of the terminals are infested with adults.
14 Crop Cotton Name