Southeastern U.S. Vegetable Crop Handbook - 2022 - 274

DISEASE CONTROL
TABLE 3-34. DISEASE CONTROL PRODUCTS FOR SWEETPOTATO (cont'd)
L. Quesada-Ocampo, Plant Pathologist, North Carolina State University
Disease/Material
FRAC
Code
FOLIAR DISEASES (ALTERNARIA) (CONT'D)
trifloxystrobin
(Flint Extra)
11
azoxystrobin + fludioxonil +
difenoconazole
(Stadium)
11+12
+3
Rate of Material
Formulation
3 to 3.8 oz/acre
Minimum Days
Harv. Reentry Method, Schedule, and Remarks
7
0.5
POSTHARVEST FUSARIUM ROT (FUSARIUM, ALBUGO IPOMOEA-PANDURATAE)
1 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.
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
4 hr
Foliar spray at 5- to 14-day intervals depending on disease incidence.
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
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)
dicloran
14
(Botran) 75 W
fludioxonil
(Scholar 1.9 SC)
WHITE MOLD (SCLEROTINIA)
Bacillus amyloliquefaciens
(Serifel)
boscalid
(Endura)
Coniothyrium minitans
(Contans WG)
fluazinam
(Omega 500F, Lektivar 40SC)
metconazole
(Quash)
pydiflumetofen + difenoconazole
(Miravis Top)
3
4 oz/acre
1
0.5
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 lb/100 gal
-
- 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.
44
7
4 to 16 oz/acre
5.5 to 10 oz/acre
10
4 hr
0.5
Begin foliar applications shortly after emergence or transplanting and
continue on 7- to 10-day intervals
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.
-
29
1 to 4 lb/acre
5.5 to 8 fl oz/acre
14
4 hr
0.5
OMRI listed product. Apply to soil surface and incorporate no deeper than 2
inches. Works best when applied prior to planting or transplanting. Do not apply
other fungicides for 3 weeks after applying Contans.
Initiate applications when conditions are favorable for disease development or
when disease symptoms first appear. Repeat applications on a 7- to 10-day
schedule. Do not apply more than 3.5 pints per year.
Make an application prior to disease development and apply again 14 days later.
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.
3+7
13.7 fl oz/acre
14
0.5
Apply in sufficient volume of water to ensure good coverage. Do not make more
than two applications of Miravis Top or other Group 3 and 7 fungicides before
alternation with a fungicide that is not in Group 3 or 7. Do not make more than 4
applications at the maximum application rate per year.
274
2022 Vegetable Crop Handbook for Southeastern United States
Southeastern U.S. Vegetable Crop Handbook - 2022

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