Southeastern U.S. Vegetable Crop Handbook - 2022 - 265

DISEASE CONTROL
TABLE 3-30. DISEASE CONTROL PRODUCTS FOR POTATO (cont'd)
S. Rideout, Plant Pathologist, Virginia Tech
Disease/Material
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)
oxathiapiprolin + chlorothalonil
(Orondis Opti A+ Orondis Opti B)
4+M
33
2 lb/acre
See label
U15+M 1.6 to 4.8 fl oz/acre
0.75 to 1.5 pints/
acre
oxathiapiprolin + mandipropamid
(Orondis Ultra A + Orondis Ultra B)
U15+40 1.6 to 4.8 fl oz acre
8.0 fl oz/acre
azoxystrobin + mefenoxam
(Quadris Ridomil Gold SL)
cyazofamid
(Ranman 400SC)
11+4
21
0.82 fl oz /
1,000 ft of row
1.4 to 2.75 fl oz/acre
(foliar)
0.42 fl oz/1,00 ft
(in-furrow)
PINK ROT, PYTHIUM LEAK, TUBER ROT
ethaboxam
(Elumin)
mefenoxam
(Ridomil Gold SL,
Ultra Flourish)
mefenoxam + chlorothalonil
(Ridomil Gold/Bravo)
mefenoxam + copper hydroxide
(Ridomil Gold/Copper)
mefenoxam + mancozeb
(Ridomil Gold MZ)
metalaxyl
(Metalaxyl 2E AG, MetaStar 2E)
mono- and di-potassium salts of
phosphorous acid (various)
33
2.5 to 10 pints/acre
4h
See label for in-furrow application or foliar application rates.
4+M
4+M
4+M
4
22
8 fl oz
N/A
0.5
5
14
-
7
0.5
4 hr
14
7
2
4h
0.5
40
29
4 to 6 fl oz/acre
5.5 to 8 fl oz/acre
4
14
45+40
21
27
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 at less than 6 fl oz rate, must tank mix with a non-Group 40 fungicide.
Do not exceed 5 applications or 30 fl oz of 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.
Do not make more than 2 sequential applications without switching to a
different mode of action and no more than 6 total applications per season. Do
not mix soil applications and foliar applications. Apply no more than 27.2 fl oz
of Orondis Opti A per season and no more than 15 pints of Orondis Opti B per
season. See label for pre-mix.
Do not make more than 2 sequential applications without switching to a
different mode of action and no more than 6 total applications per season. Do
not mix soil applications and foliar applications. Apply no more than 27.2 fl oz
of Orondis Ultra A per season and no more than 32 fl oz of Orondis Ultra B per
season.
Apply as an in-furrow spray in 3 to 15 gal of water per acre at planting.
For pink rot and Pythium leak, apply at the high rate. Do not apply more than
10 sprays per crop or more than 27.5 fl oz/acre/season. Make no more than 3
consecutive applications followed by 3 applications from a different resistance
management group.
Apply using a 6 to 8 " band directly over seedpiece or in furrow where
seedpiece will be dropped, prior to furrow closure. Apply as a side dressing
between hilling and tuber initiation. Do not exceed 2 applications/year or 16 fl
oz/acre/year.
4
0.42 fl oz/
1,000 ft of row
0.84 fl oz/
1,000 ft of row
2.5 pt/acre
2 lb/acre
2.5 lb/acre
12.8 fl oz/acre
14
14
14
14
2
2
2
2
7
2
See labels for maximum amount of product allowable per season. PHI is
based on foliar application for Ultra Flourish.
Apply at flowering and then continue on a 14-day interval. Do not exceed more
than four applications per crop.
Apply at 14-day intervals for up to 3 applications. Alternate with a protectant
fungicide.
Apply at 14-day intervals for up to 4 applications.
Preplant incorporated or soil surface spray
FRAC
Code
30
Rate of Material
Formulation
4 to 6 fl oz/acre
2.5 to 3.75 oz/acre
22 M
1.5 to 2.0 lb/acre
14
2
Minimum Days
Harv.
7
Reentry Method, Schedule, and Remarks
BLACK SCURF (RHIZOCTONIA SOLANI) AND SILVER SCURF (HELMINTHOSPORIUM SOLANI) (CONT'D)
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.
2022 Vegetable Crop Handbook for Southeastern United States
265
Southeastern U.S. Vegetable Crop Handbook - 2022

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