Southeastern U.S. Vegetable Crop Handbook - 2021 - 256

TABLE 3-30. DISEASE CONTROL PRODUCTS FOR POTATO, IRISH (cont'd)
I. Meadows, Plant Pathologist, North Carolina State University (Not updated in 2020)
Disease
Early blight,
Late blight (cont'd)
Material
dimethomorph
(Forum)
fenamidone
(Reason 500SC)
fluoxastrobin
(Aftershock, Evito 480 SC)
FRAC
Code
40
11
Rate of Material
Formulation
4 to 6 fl oz/acre
Minimum Days
Harv. Reentry Method, Schedule, and Remarks
1
4
5.5 to 8.2 fl oz/acre 14
0.5
Must tank mix if using less than 6 fl oz rate; if used alone,
use 6 oz rate. DO NOT make more than 5 applications per
season. Limit 30 fl oz/acre/season.
Begin applications when conditions favor disease development,
and continue on 5 to 10 day interval. Do not apply
more than 24.6 fl oz per growing season. Alternate with
fungicide from different resistance management group.
11
2 to 3.8 fl oz/acre
7
0.5
Begin applications when conditions favor disease development
on 7 to 10 day intervals. Do not apply more than once
before alternating with fungicides that have a different mode
of action. Do not apply more than 22.8 fl oz per acre per
season. For late blight, apply at full label rate.
fluxapyroxad + pyraclostrobin
(Priaxor)
mancozeb + azoxystrobin
(Dexter Max)
mancozeb + chlorothalonil
(Elixir)
metiram
(Polyram 80DF)
mandipropamid + difenoconazole
(Revus
Top)
mefenoxam + chlorothalonil
(Ridomil Gold Bravo SC)
mefenoxam + mancozeb
(Ridomil Gold MZ WG)
propamocarb hydrochloride
(Previcur Flex)
pyraclostrobin
(Headline; Headline SC)
pyraclostrobin + chlorothalonil
(Cabrio
Plus)
pyrimethanil
(Scala 5F)
trifloxystrobin
(Gem 500SC)
9
11
7 fl oz/acre
2.9 to 3.8 fl oz/acre
7
7
0.5
0.5
11 + M
2.0 to 2.9 lb/acre
14
1
40 + 3
4 + M
4 + M
28
11
5.5 to 7 fl oz/acre
2.5 pints/acre
2.5 lb/acre
14
14
14
0.7 to 1.2 pints/acre 14
6 to 12 fl oz/acre
3
0.5
2
2
0.5
1
After 2 applications, switch to a different mode of action. Do
not apply more than 28 fl oz/acre/season.
See label for limits on application limits per season and
application interval.
Apply at 14-day intervals for up to 3 applications.
Tank mix with a protectant fungicide such as mancozeb or
chlorothalonil. Do not exceed 6 pints of product/acre/season.
DO NOT exceed more than six foliar applications or 72 total
oz of product per acre per season. For early blight, use 6 to
9 oz rate. Do not apply more than one time before alternating
with a fungicide with a different mode of action.
Do not apply more than 2 applications before switching to
a different mode of action. Do not exceed 17.4 lbs/acre/
season. For late blight, use 12 lb/acre rate.
Labeled for early blight only. Do not apply more than 35
fluid ounces per crop.
Must tank mix with a non-Group 11 fungicide for late blight.
Use the 3.8 of oz rate for late blight. Do not make more
than 1 application without switching to a different mode of
action. Do not exceed 6 applications or 23 fl oz product/acre/
season.
triphenyltin hydroxide
(Super Tin 4L)
(Super Tin 80WP, Agri Tin)
zoxamide + mancozeb
(Gavel 75DF)
Late blight
ametoctradin + dimethomorph
(Zampro)
cyazofamid
(Ranman
400SC)
cymoxanil
(Curzate 60DF)
dimethomorph
(Forum)
40
4 to 6 fl oz/acre
4
27
21
1.4 to 2.75 fl oz/
acre
3.2 oz/acre
7
14
0.5
30
4 to 6 fl oz/acre
2.5 to 3.75 oz/acre
22 + M
45 +
40
1.5 to 2.0 lb/acre
11 to 14 fl oz/acre
14
4
2
7
2
For Super Tin 4L, the 3.0 fl oz rate may be used if tank
mixed. Add to 3 to 15 gallons of water depending on method
of application. Season application limits apply-see label.
Do not make more than 6 applications or apply more than 12
lbs product/acre/season.
Do not make more than 2 applications without switching to a
different mode of action. Do not exceed 42 fl oz/acre/season
and 3 applications/season.
Do not apply more than 10 sprays per crop. Make no more
than 3 consecutive applications, and then follow with 3 applications
of another mode of action.
0.5 USE ONLY WITH A PROTECTANT FUNGICIDE such as
mancozeb or chlorothalonil. No more than 7 applications/
crop/year.
0.5
If applying at less than 6 fl oz rate, must tank mix with a nonGroup
40 fungicide. Do not exceed 5 applications or 30 fl oz
of product/acre/season.
7
M + 11
4 to 8 fl oz/acre
1.6 to 2.1 lb/acre
M + M 1.8 to 2.4 lb/acre
M
1.5 to 2 lb/acre
7
14
14
14
0.5
1
1
1
Apply at 7 to 14 day intervals. Do not apply more than 24 oz/
acre/season including in furrow and foliar uses.
Do not exceed 16 lbs product/acre/crop. Season limits apply
for azoxystrobin.
Do not apply more than 18 lbs product/crop/year.
Do not apply more than 14 lb product/crop/year.
256
2021 Vegetable Crop Handbook for Southeastern United States
DISEASE CONTROL
Southeastern U.S. Vegetable Crop Handbook - 2021

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