Southeastern U.S. Vegetable Crop Handbook - 2021 - 296

TABLE 3-45. GREENHOUSE DISEASE CONTROL FOR VARIOUS VEGETABLE CROPS (cont'd)
R. A. Melanson, Extension Plant Pathologist, Mississippi State University; A. Keinath, Plant Pathologist, Clemson University;
A. Cato, Extension Horticulture IPM, University of Arkansas; I. Meadows, Extension Plant Pathologist, North Carolina State University
Commodity Disease
Product 1
Lettuce
(cont'd)
Powdery mildew
sulfur (various)
FRAC Rate of Material
See label
M02
Minimum Days
Harv.
See
label
Reentry
Method, Schedule, and Remarks
See label Some products are OMRI-listed. See product
labels for complete application instructions, specific
crop and disease labels, and greenhouse
usage. Check state registration status prior
to use.
Powdery mildew
Suppression:
Downy mildew
tolfenpyrad
(Torac)
39
21.0 fl oz/acre
1
0.5
Not prohibited for greenhouse use. Do not
apply until at least 14 days after emergence
or transplanting. Do not exceed 42 fl oz or two
applications of product or 0.42 lb of tolfenpyrad
per acre per crop cycle. Do not exceed four
applications of product per year. Allow at least 14
days between applications. IRAC 21A.
Alternaria leaf spot (Alternaria
spp.), anthracnose (Colletotrichum
spp.), powdery mildew (G. cichoracearum
2
)
trifloxystrobin
(Flint Extra)
11
3.0 to 3.8 fl
oz/acre
See
label
0.5
Not prohibited for greenhouse use. For use
on head and leaf lettuce. Do not exceed 7.6 fl oz
of product per acre per year. Do not apply more
than two sequential applications of product or
another FRAC 11-containing fungicide before
rotating with a fungicide from a different FRAC
group. The minimum interval between applications
is 5 days.
Alternaria leaf spot/black spot
(Alternaria spp.), powdery mildew
(Golovinomyces spp.2
)
triflumizole
(Procure 480SC)
3
6 to 8 fl oz/acre
0.5
See label for greenhouse usage instructions.
For use on head and leaf lettuce. See
label for additional uses on lettuce. Do not
exceed two applications of product per crop
per year. Do not exceed 16 fl oz of product per
crop per year.
Tomato -
transplant
production
Anthracnose (Colletotrichum spp.),
black mold (Alternaria alternata),
early blight (Alternaria linariae 2
),
gray leaf spot (Stemphylium spp.),
leaf mold (Passalora fulva 2
), powdery
mildew (Leveilula taurica),
Septoria leaf spot (Septoria lycopersici),
target spot (Corynespora
cassiicola)
azoxystrobin +
benzovindiflupyr
(Mural)
11 + 7 0.6 oz/5,000 sq ft
-
0.5
Allowed for use on transplants grown
for resale to consumers. Do not apply to
tomatoes grown in a greenhouse for the
purpose of producing and harvesting fruit.
Do not exceed two applications of product
per crop for plants grown indoors for resale
to consumers. Do not apply until 21 days
after transplanting or 35 days after seeding.
Do not use adjuvants or tank-mix Mural with
any product formulated as an emulsifiable
concentrate (EC). See label for restrictions for
product use when multiple crops are grown
in the same area. See label for instructions
and cautions regarding the use of adjuvants
and tank mixing. Do not apply more than two
consecutive applications of product before alternating
to another fungicide from a different
FRAC group.
Damping off
(Pythium spp.)
Gray mold
(Botrytis cinerea)
cyazofamid
(Ranman
400SC)
fenhexamid
(Decree 50
WDG)
Late blight
(Phytophthora infestans)
mandipropamid
(Micora)
21
3 fl oz/100 gal
-
0.5
Apply as a soil drench. Do not use a surfactant.
One fungicide application can be made to the
seedling tray at planting or any time afterwards
until one week before transplanting.
17
1.5 lb/acre
(stand-alone)
1.0 to 1.5 lb/acre
(tank-mix)
40
5.5 to 8.0 fl oz/acre
(0.65 to 0.9 fl
oz/5,000 sq ft)
-
4 hr
-
0.5
Do not make more than two consecutive applications.
See label for additional tank-mixing
instructions. Do not exceed 6.0 lb product per
acre to transplants.
For tomato transplants grown in enclosed
greenhouses with permanent flooring for resale
to consumers. Do not make more than two
applications of product per crop. Do not make
more than two consecutive applications before
switching to a fungicide with a different mode of
action. The addition of a spreading/penetrating
type adjuvant is recommended.
Botrytis rot (Botrytis spp.), early
blight (A. linariae2
), powdery
mildew (L. taurica, O. sipula)
Suppression:
Anthracnose (C. coccodes)
polyoxin D zinc
salt
(Affirm WDG)
19
6.2 oz/acre
-
4 hr
Allowed for use in greenhouses ONLY in the
production of seedlings and transplants;
product is not for use in the production
of edible commodities. See product labels
for maximum limits of act ive ingredient and
applications per season. See product labels for
additional application instructions and labeled
diseases.
296
2021 Vegetable Crop Handbook for Southeastern United States
DISEASE CONTROL
Southeastern U.S. Vegetable Crop Handbook - 2021

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