Southeastern U.S. Vegetable Crop Handbook - 2021 - 266

TABLE 3-34. DISEASE CONTROL PRODUCTS FOR SWEETPOTATO (cont'd)
L. Quesada-Ocampo, Plant Pathologist, North Carolina State University
Disease
Foliar diseases
(Alternaria) (cont'd)
Material
pyraclostrobin
(Cabrio) 20 WG
pyrimethanil
(Scala SC)
trifloxystrobin
(Flint Extra)
Postharvest Fusarium rot azoxystrobin + fludioxonil +
difenoconazole
(Stadium)
Mottle necrosis
(Pythium postharvest)
Powdery mildew
potassium phosphite
(Allude)
azoxystrobin+ difenoconazole
(Quadris
Top)
cyprodinil + fludioxonil
(Switch 62.5WG)
difenoconazole +
benzovindiflupyr
(Aprovia Top)
fluopyram + pyrimethanil
(Luna Tranquility)
metconazole
(Quash)
9 + 12
7 + 3
7 + 9
11 to 14 oz/acre
10.5 to 13.5 fl oz/
acre
11.2 fl oz/acre
7
14
7
0.5
0.5
0.5
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.
3
2.5 to 4 oz/acre
1
0.5
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.
penthiopyrad
(Vertisan)
pyraclostrobin
(Cabrio) 20 WG
Postharvest Rhizopus
soft rot
dicloran
(Botran) 75 W
fludioxonil
(Scholar 1.9 SC)
12
16 to 32 fl oz/100 gal -
7
11
14
0.7 to 24 fl oz/acre
8 to 12 oz/acre
1 lb/100 gal
7
-
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.
- Spray or dip. Dip for 5 to 10 seconds in well-agitated
suspension. Add ½-pound Botran to 100 gallons of
treating suspension after500 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
fluid ounces in 7 to 25 gallons of water, wax/emulsion, or
aqueous dilution of wax/oil emulsion. Can also be used to
disinfest tanks, refer to label.
White mold (Sclerotinia)
boscalid
(Endura)
7
5.5 to 10 oz/acre
10
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.
Coniothyrium minitans
(Contans WG)
-
1 to 4 lb/acre
4 hr
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.
P07
11 + 3
1¼ quarts/acre
8 to 14 fl oz/acre
14
4 hr
0.5
FRAC
Code
11
9
11
11 + 12
+ 3
Rate of Material
Formulation
8 to 12 oz/acre
7 fl oz/acre
3 to 3.8 oz/acre
1 fl oz per 2,000 lbs
of roots
Minimum Days
Harv.
7
7
Reentry
0.5
0.5
0.5
Method, Schedule, and Remarks
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.
_
_
Ensure proper coverage, use tumbling, and mix the fungicide
solution in sufficient water volume. Do not make
more than one postharvest application.
Foliar spray at 5- to 14-day intervals depending on
disease incidence.
Begin foliar applications prior to disease and continue
on a 7- to 14-day interval.
266
2021 Vegetable Crop Handbook for Southeastern United States
DISEASE CONTROL
Southeastern U.S. Vegetable Crop Handbook - 2021

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