Southeastern U.S. Vegetable Crop Handbook - 2023 - 260

DISEASE CONTROL
TABLE 3-30. DISEASE CONTROL PRODUCTS FOR POTATO (CONT'D)
S. Rideout, Plant Pathologist, Virginia Tech
Disease/Material
FRAC
Code
11
Rate of Material
Formulation
2 to 3.8 fl oz/acre
Minimum Days
Harv. Reentry Method, Schedule, and Remarks
BLACK SCURF (RHIZOCTONIA SOLANI) AND SILVER SCURF (HELMINTHOSPORIUM SOLANI) (cont'd)
fluoxastrobin
7
(Aftershock, Evito 480 SC)
fluxapyroxad + pyraclostrobin
(Priaxor Xemium)
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)
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)
fluazinam
(Omega 500F, Omega Top MP)
mefenoxam + copper hydroxide
(Ridomil Gold/Copper)
mono- and di-potassium salts of
phosphorous acid
(various)
260
4+M
33
2 lb/acre
See label
14
2
4h
40
29
4 to 6 fl oz/acre
5.5 to 8 fl oz/acre
4
14
27
11+M
9
11
2.0 to 2.9 lb/acre
7 fl oz/acre
2.9 to 3.8 fl oz/acre
14
7
7
40+3
4+M
4+M
28
11
5.5 to 7 fl oz/acre
2.5 pints/acre
2.5 lb/acre
0.7 to 1.2 pints/acre
6 to 12 fl oz/acre
14
14
14
14
3
0.5
2
2
0.5
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.
1 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.
1
0.5
0.5
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.
Only labeled for early blight. 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.
30
4 to 6 fl oz/acre
2.5 to 3.75 oz/acre
22 M
1.5 to 2.0 lb/acre
14
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
limit apply-see label.
Do not make more than 6 applications or apply more than 12 lbs product/
acre/ season.
45+40
21
11 to 14 fl oz/acre
1.4 to 2.75 fl oz/
acre
3.2 oz/acre
4
7
14
0.5
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
0.5
If applying less than 6 fl oz rate, must tank mix with non-Group 40 fungicide.
Do not exceed 5 applications or 30 fl oz product/acre/season.
Begin applications when plants are 6 to 8 in. tall or when conditions favor
disease development. Repeat applications at 7- to 10-day intervals. For
late blight, use the 5.5 fl oz rate. DO NOT apply more than 3.5 pt per acre
during each growing season.
MUST tank-mix with a protectant fungicide. Apply at 14-day intervals
for up to 3 applications; alternated and followed by the full rate of a
protectant.
Mix with a fungicide labeled for control of late blight. See label for in-furrow
application or foliar application rates.
7
M+11
M+M
M
4 to 8 fl oz/acre
1.6 to 2.1 lb/acre
1.8 to 2.4 lb/acre
1.5 to 2 lb/acre
7
14
14
14
0.5
1
1
1
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.
Apply at 7- to 14-day intervals. Do not apply more than 24 oz per acre per
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.
2023 Vegetable Crop Handbook for Southeastern United States
Southeastern U.S. Vegetable Crop Handbook - 2023

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