Southeastern U.S. Vegetable Crop Handbook - 2021 - 176

TABLE 2-18. INSECT CONTROL FOR POTATO, IRISH (cont'd)
Insect
Insecticide, Mode of Action
Code, and Formulation
Aphid
acetamiprid, MOA 4A
(Assail) 30 SG
Amount of
Formulation
Per Acre
1.5 to 4 oz
Restricted
Entry Interval
(REI)
12 hrs
Pre harvest
Interval
(PHI) (Days) Precautions and Remarks
7
Do not make more than 4 applications per season. Thorough
coverage is important. Assail belongs to the same class of
insecticides (neonicotinoid, 4A) as Admire Pro, Belay and
Platinum (soil insecticides) and Provado and Actara (foliar
insecticides). Colorado potato beetle populations have developed
resistance to this class.
clothianidin MOA 4A
(Belay) 2.13
12 hrs
2 to 3 fl oz
7
Apply Belay 50 as foliar spray when populations reach a
threshold level. Do not apply more than 3 applications. Be- lay
belongs to the same class of insecticides (neonicotinoid) as
Admire Pro, Provado, Actara, and Platinum and Colorado potato
beetle populations have the potential to become resistant
to this class.
flonicamid, MOA 20D
(Beleaf) 50 SG
flupyradifurone, MOA 4D
(Sivanto Prime) 1.67 SL
dimethoate 4 EC, MOA 1B
imidacloprid, MOA 4A
(Admire Pro) 4.6F
pymetrozine, MOA 9B
(Fulfill) 50 WDG
thiamethoxam, MOA 4A
(Actara) 25 WDG
12 hrs
2 to 2.8 oz
4 hrs
7.0 to 12.0 fl oz
0.5 to 1 pt
1.2 fl oz
48 hrs
12 hrs
1
7
Do not apply more than 2 pints total per year.
To minimize selection for resistance in Colorado potato beetle,
do not use acetamiprid, imidacloprid, or thiamethoxam for
aphid control if either of these compounds was applied to the
crop for control of Colorado potato beetle. See comments on
insecticide rotation under Colorado potato beetle.
12 hrs
2.75 oz
12 hrs
3 oz
14
14
Allow at least 7 days between applications. Do not exceed a
total of 5.5 ounces (0.17 lb a.i.) per acre per season.
To minimize selection for resistance in Colorado potato beetle,
do not use imidacloprid or thiamethoxam for aphid control if
either of these compounds was applied to the crop for control
of Colorado potato beetle.
Colorado potato beetle Colorado potato beetle populations in most commercial potato-growing areas have developed resistance to many insecticides.
As a result, insecticides that are effective in some areas, or were effective in the past, may no longer provide control
in particular areas. Colorado potato beetle readily develops resistance to insecticides. The following practices help to
reduce the risk of resistance developing:
CROP ROTATION AND INSECTICIDE ROTATION
The use of insecticides representing different modes of action IRAC MoA class number in different years and against different generations
of potato beetle within a year are essential if insecticide resistance is to be managed and the risks of control failures due to
resistance minimized. If control failures or reduced levels of control are observed with a particular insecticide, do NOT make a second
application of the same insecticide at the same or higher rate. If an additional insecticide application is necessary, a different insecticide
representing a different IRAC MoA class number should be used. Because potato beetle adults will move between adjacent
and nearby fields from one year to the next, It is important to maintain the same rotation schedule of insecticide MOA classes in
adjacent fields are groups of nearby fields.
SCOUT FIELDS: All insecticide applications to the potato crop, regardless of the target insect pest, have the potential to in- crease
the resistance of the Colorado potato beetle to insecticides. Unnecessary insecticide applications should be avoided by scouting fields
for insect pests and applying insecticides only when potentially damaging insect populations are present.
SPOT TREATMENTS: Because overwintered potato beetles invade rotated fields from sources outside the field, potato beetle
infestations in rotated fields occur first along field edges early in the season. Limiting insecticide applications to infested portions
of the field will provide effective control and reduce costs. Growers are advised to keep accurate records on which insecticides have
been applied to their potato crop for control of Colorado potato beetle and on how effective those insecticides were at controlling
infestations. This will make choosing an insecticide and maintaining insecticide rotations easier. Monitoring the insecticide resistance
status of local populations will also make insecticide selection easier.
abamectin, MOA 6
(Agri-Mek) 0.7 SC
12 hrs
1.75 to 3.5 fl oz
Acetamiprid, MOA 4A
(Assail) 70 WP
12 hrs
0.6 to 1.7 oz
7
14
Apply when adults and/or small larvae are present but before
large larvae appear. Do not exceed two applications per season.
Apply in at least 20 gallons water per acre.
Apply when most egg masses have hatched and many small
but few large larvae are present. An additional application
should be used only if defoliation increases. Allow at least 7
days between foliar applications. To minimize selection for
resistance, do not use foliar applications of any IRAC MOA
class 4A insecticides if any IRAC MOA class 4A insecticides
were applied to the crop as soil or seed piece treatments.
See comments on insecticide rotation under Colorado potato
beetle.
chlorantraniliprole, MOA 28
(Coragen) 1.67
clothianidin MOA 4A
(Belay) 2.13
4 hrs
3.5 to 5 oz
12 hrs
2 to 3 fl oz
7
14
Do not apply more than 15.4 ounces Coragen per acre per
crop season. Coragen treated insects may take several days
to die, but stop feeding almost immediately after treatment.
Apply Belay 50 WDG as foliar spray Apply when adults and/
or small larvae are present but before large larvae appear. Do
not apply more than 3 applications. Belay belongs to the same
class of insecticides (neonicotinoid) as Admire Pro, Provado,
Actara, and Platinum and some Colorado potato beetle populations
have developed resistance to this class.
7
176
2021 Vegetable Crop Handbook for Southeastern United States
INSECT CONTROL
Southeastern U.S. Vegetable Crop Handbook - 2021

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