Southeastern U.S. Vegetable Crop Handbook - 2023 - 259

DISEASE CONTROL
TABLE 3-30. DISEASE CONTROL PRODUCTS FOR POTATO (CONT'D)
S. Rideout, Plant Pathologist, Virginia Tech
Disease/Material
FRAC
Code
EARLY BLIGHT, WHITE MOLD (cont'd)
fluxapyroxad + pyraclostrobin
(Priaxor Xemium)
iprodione
(various)
metconazole
(Quash)
metiram + pyraclostrobin
(Cabrio Plus)
penthiopyrad
(Vertisan)
2
3
M+11
7+11
Rate of Material
Formulation
4 to 8 oz/acre
See label
2.5 to 4 oz/acre
2.0 to 2.9 lb/acre
Minimum Days
Harv. Reentry Method, Schedule, and Remarks
7
14
1
14
0.5
1
0.5
1
Apply at 7- to 14-day intervals. Do not apply more than 24 oz/acre/season
including in furrow and foliar uses. Use 6 to 8 oz/acre for SUPPRESSION
of white mold. Maximum of 3 applications.
Rates may vary depending on the product.
Limit 16 oz/acre/season. Make no more than 2 applications before changing
modes of action. Limit to 4 applications per year. Use the 4 oz rate for
white mold.
Apply at 7- to 14-day intervals. Do not apply more than 17.4 lb/acre product
per season. Do not apply more than 2 sequential applications before
alternating with a fungicide with a different mode of action. Use at 2.9 lb/
acre rate for SUPPRESSION of white mold.
7
10 to 24 oz/acre
7
0.5
Apply at 7- to 14-day intervals. Make no more than 2 applications before
alternating with a fungicide with a different mode of action. For SUPPRESSION
of white mold, use at 14 to 24 oz/acre. Do not exceed 72 oz
per acre per year. Do not apply more than 11.25 oz a.i. per acre per year
in total from any combination of seed, soil, or foliar applications.
pyraclostrobin
(Headline, Headline SC)
11
6 to 12 fl oz/acre
3
0.5 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; for SUPPRESSION
of white mold, use 6 to 12 oz rate, depending on weather
conditions and disease pressure. Do not apply more than one time before
alternating with a fungicide with a different mode of action.
pyrimethanil
(Scala SC)
thiophanate-methyl
(various)
LATE BLIGHT, WHITE MOLD
fluazinam
(Omega 500 F)
9
7 fl oz/acre
7
0.5
Apply at 7- to 14-day intervals. Do not apply more than 35 fl oz per acre
per season. For control of early blight only.
1
See label
See
label
29
5.5 to 8 fl oz/acre
14
0.5
Rates may vary depending on the product.
0.5
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.
BLACK SCURF (RHIZOCTONIA SOLANI) AND SILVER SCURF (HELMINTHOSPORIUM SOLANI)
azoxystrobin
(various)
11
azoxystrobin + chlorothalonil
(Quadris Opti)
chlorothalonil
(various)
chlorothalonil + cymoxanil
(Ariston)
chlorothalonil + zoxamide
(Zing!)
fixed copper
(various)
cymoxanil + famoxadone
(Tanos)
dimethomorph
(Forum)
fenamidone
(Reason 500SC)
11+M
M
M+27
M+22
See label
1.6 pt/acre
See label
2 pt/acre
24 to 34 fl oz/acre
14
14
7
14
7
0.5
0.5
0.5
0.5
4 hr Rates may vary depending on the product. Do not apply more than one
application without alternating away from fungicides in Group 11. See
label for limits of active ingredients
Apply at 5- to 7-day intervals. Do not apply more than one application
without alternating away from fungicides in Group 11. See label for limits
of active ingredients.
Rates may vary depending on the product.
Apply at 5- to 7-day intervals. Do not exceed 17.5 pt of product per acre
per 12-month period.
Apply at 5- to 7-day intervals. Do not make more than 2 sequential
applications before alternating with a fungicide that has a different mode
of action. Do not make more than 8 applications per acre per season. Use
30 to 34 fl oz rate for late blight.
M1
27+C3
See label
6 to 8 oz/acre
14
1
0.5
See label. Rates vary depending on the formulation.
Use rate of 6 fl oz only for early blight. Do not apply more than 48 oz/
acre per crop season and no more than 72 oz/acre per 12 months. Do not
make more than one application before alternating with a fungicide with a
different mode of action.
40
11
4 to 6 fl oz/acre
5.5 to 8.2 fl oz/acre
4
14
1
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.
2023 Vegetable Crop Handbook for Southeastern United States
259
Southeastern U.S. Vegetable Crop Handbook - 2023

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