Southeastern U.S. Vegetable Crop Handbook - 2023 - 270

DISEASE CONTROL
TABLE 3-34. DISEASE CONTROL PRODUCTS FOR SWEETPOTATO (CONT'D)
L. Quesada-Ocampo and A. Gorny, Plant Pathologists, North Carolina State University
Minimum Days
Disease/Material
FRAC
Code
11
Rate of Material
Formulation
FOLIAR DISEASES (ALTERNARIA) (cont'd)
fenamidone
(Reason 500SC)
fluoxastrobin
(Aftershock)
pydiflumetofen + fludioxonil
(Miravis Prime)
pyraclostrobin
(Cabrio) 20 WG
pyrimethanil
(Scala SC)
trifloxystrobin
(Flint Extra)
azoxystrobin + fludioxonil +
difenoconazole
(Stadium)
11
7+12
11
9
11
5.5 to 8.2 fl oz/acre
2 to 3.8 fl oz/acre
6.8 fl oz/acre
8 to 12 oz/acre
7 fl oz/acre
3 to 3.8 oz/acre
POSTHARVEST FUSARIUM ROT (FUSARIUM)
11+12
+3
1.25 fl oz per
2,000 lbs of roots
MOTTLE NECROSIS (PYTHIUM POSTHARVEST)
potassium phosphite
(Allude)
P07
POWDERY MILDEW
azoxystrobin+ difenoconazole
(Quadris Top)
cyprodinil + fludioxonil
(Switch 62.5WG)
difenoconazole +
benzovindiflupyr
(Aprovia Top)
fluopyram + pyrimethanil
(Luna Tranquility)
metconazole
(Quash)
penthiopyrad
(Vertisan)
pyraclostrobin
(Cabrio) 20 WG
pydiflumetofen + fludioxonil
(Miravis Prime)
11+3
9+12
7+3
7+9
3
_
_
Ensure proper coverage, use tumbling, and mix the fungicide solution in sufficient
water volume. Do not make more than one postharvest application.
Harv. Reentry Method, Schedule, and Remarks
14
7
7
7
7
0.5
0.5
0.5
0.5
0.5
0.5
Begin foliar applications prior to disease and continue on a 5- to 10- day
interval.
Limit to 22.8 fl oz per acre per year. For soilborne disease control, refer to
label. Begin foliar applications prior to disease and continue on a 7- to 10day
interval.
Limit to 20.4 fl oz/acre per year. Begin applications prior to disease development.
Continue applications through season on a 7- to 10-day interval.
Do not apply more than 48 fl oz per acre per season. Alternate with a fungicide
with a different mode of action after each use.
Begin foliar applications prior to disease and continue on a 7- to 14- day
interval.
Apply on a 7- to 10-day interval as needed. Do not make more than six
applications per year or apply more than 23 fl oz per acre per year.
1 1/4 quarts/acre
8 to 14 fl oz/acre
11 to 14 oz/acre
10.5 to
13.5 fl oz/acre
11.2 fl oz/acre
2.5 to 4 oz/acre
7
1
0.5
0.5
4 hr Foliar spray at 5- to 14-day intervals depending on disease incidence.
14
7
14
0.5
0.5
0.5
Begin foliar applications prior to disease and continue on a 7- to 14-day
interval.
Begin foliar applications prior to disease and continue on a 7- to 10-day
interval.
No more than two applications can be made at a 7-day interval; all other
applications must be made at a 14-day interval. Apply no more than 27 fl oz
per acre per year.
Limit to 54.7 fl oz per acre per year. Do not make more than two sequential
applications of Group 7-containing fungicides. Labeled for Alternaria and
Sclerotinia. Apply at 7- or 14-day intervals.
Begin foliar applications prior to disease and continue on a 7- to 10-day
interval. Do not apply more than 16 fl oz per year or four times per year.
Do not make more than two sequential applications before alternating with
products with different modes of action.
7
11
7+12
0.7 to 24 fl oz/acre
8 to 12 oz/acre
6.8 fl oz/acre
POSTHARVEST RHIZOPUS SOFT ROT (RHIZOPUS)
azoxystrobin + fludioxonil +
difenoconazole
(Stadium)
dicloran
11+12
+3
14
(Botran) 75 W
fludioxonil
(Scholar 1.9 SC)
12
16 to 32 fl oz/
100 gal
-
7
7
0.5
0.5
0.5
For soilborne disease control, refer to label. Begin foliar applications prior to
disease and continue on a 7- to 14-day interval.
Do not apply more than 48 fl oz per acre per season. Alternate with a fungicide
with a different mode of action after each use.
Limit to 20.4 fl oz/acre per year. Begin applications prior to disease development.
Continue applications through season on a 7- to 10-day interval.
1 fl oz per
2,000 lbs of roots
1 lb/100 gal
-
_
_
Section 2 (ee) label for NC and CA expires 12/31/2025. Ensure proper
coverage, use tumbling, and mix the fungicide solution in sufficient water
volume. Do not make more than one postharvest application.
- Spray or dip. Dip for 5 to 10 seconds in well-agitated suspension. Add
½-pound Botran to 100 gallons of treating suspension after 500 bushels
treated. Do not rinse.
- Dip for approximately 30 seconds in well-agitated solution and allow
sweetpotatoes to drain. Add 8 fl oz to 100 gals after 500 bushels are treated.
ALTERNATIVELY, mix 16 fl oz in 7 to 25 gal of water, wax/emulsion, or
aqueous dilution of wax/oil emulsion. Can also be used to disinfest tanks,
refer to label.
WHITE MOLD (SCLEROTINIA)
Bacillus amyloliquefaciens
(Serifel)
boscalid
(Endura)
44
7
4 to 16 oz/acre
5.5 to 10 oz/acre
10
4 hr Begin foliar applications shortly after emergence or transplanting and continue
on 7- to 10-day intervals
0.5
Begin applications prior to disease development and apply again at a 7- to
14-day interval. Do not apply more than 20 fl oz per year. Do not make
more than two sequential applications before alternating with products with
different modes of action.
270
2023 Vegetable Crop Handbook for Southeastern United States
Southeastern U.S. Vegetable Crop Handbook - 2023

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