Agronomic Crops

Sweetpotato
Weevils
Insecticide
soil Application:
Amount of
Formulation per Acre
Pounds Active
Ingredient per Acre
Acres 1 Gallon or
1 Pound Dry Will Treat
PHI
(days)
Comments
bifenthrin (P)
Brigade 2EC
Brigade 2EC
9.6-19.2 oz (at planting)
3.2-9.6 oz (at layby)
0.15–0.30
0.05–0.15
13.3–6.7
40–13.3
21
21
carbaryl (C)
Sevin 4F
48 oz.
1.5
2.7
7
clothianidin (N)
Belay 2.13 SC
12 oz.
0.2
10.7
Foliar Application:
b-cyfluthrin (P)
Baythroid XL
1.6-2.8 oz.
0.013–0.022
80–45.7
0
bifenthrin (P)
Brigade 2EC
2.1-6.4 oz
0.033–0.10
60.6–20
21
chlorantraniliprole (D) +
λ-cyhalothrin (P)
Besiege
6 – 9 oz.
21.3 – 14.2
14
cyfluthrin (P)
Tombstone 2 EC
1.6-2.8 oz.
0.025–0.044
80–45.7
0
phosmet (OP)
Imidan 70 W
21.3 oz.
0.93
0.75
7
e sWeetPotAto WeeVIL is a serious insect pest, but it rarely infests commercial fields in north Mississippi. e Bureau
of Plant Industry has a monitoring program to detect sweetpotato weevils and a quarantine program to prevent this pest from
infesting most Mississippi sweetpotato production areas. Producers with 3 or more acres in sweetpotato production must register
with BPI for the monitoring program.
Beds are susceptible to sweetpotato weevil infestations. If you purchase slips, insist on weevil-free slips. Locate plant beds away
from sweetpotato storage and last season’s production areas. Female weevils oviposit in stems near the soil line, so cut slips at least 2
inches above the soil to help prevent spreading weevils to production fields. Destroy plant beds as soon as you no longer need them.
Weevils in the sweetpotato crop in most of Mississippi warrant regulatory action. If you catch one or more weevils in pheromone
traps, the Bureau of Plant Industry will notify you of required treatments.
Foliar applications are effective only against adult sweetpotato weevils.
Whiteflies
Insecticide
Amount of
Formulation per Acre
Pounds Active
Ingredient per Acre
Acres 1 Gallon or
1 Pound Dry Will Treat
PHI
(days)
Comments
soil Application:
imidacloprid (N)
Admire Pro 4.6 SC
7–10.5 oz.
0.25–0.38
18.3–12.2
125
Foliar Application:
bifenthrin (P) +
imidacloprid (CN)
Brigadier
5.1 – 7.7 oz.
25.1 – 16.6
21
imidacloprid (N)
Admire Pro 4.6 SC
1.2 oz.
0.043
106.7
7
novaluron (IGR)
Rimon 0.83 EC
12 oz.
0.078
10.7
14
spiromesifen (TN)
Oberon 4SC
4 – 8 oz.
0.125 – 0.25
32 – 16
7
spirotetramat (TA)
Movento 2 SC
4–5 oz.
0.06–0.08
32–25.6
7
sulfoxaflor (SX)
Transform WG
2.0 – 2.5 oz.
0.023 – 0.047
21.3 – 10.7
7
WHIteFLIes can transmit several viral diseases. Control of whiteflies infesting plant beds may reduce transfer of diseased
plants to the field.
Two species of whiteflies infest sweetpotatoes. e sweetpotato whitefly is more difficult to control than the bandedwinged
whitefly.
tHResHoLD: Treat when colonies are present.
74 Sweetpotatoes