Southeastern U.S. Vegetable Crop Handbook - 2023 - 309

DISEASE CONTROL
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
Minimum Days
Harv.
Crop/Disease
Botrytis gray mold (Botrytis spp.),
early blight
(A. linariae 2
), leaf mold
(F. fulva 2
) powdery mildew
(Leveilula, Oidiopsis)
Suppression: Anthracnose
(Colletotrichum spp.), late blight
(P. infestans), target spot (C.
cassiicola)
Labels may include: Alternaria
diseases, anthracnose, Botrytis,
powdery mildew, Septoria leaf
spot
potassium
bicarbonate
(Carb-O-Nator,
MilStop SP)
NC 2.5 to 5.0 lb/100 gal
(Carb-O-Nator)
1.25 to 5.0 lb/100 gal
(MilStop SP)
4 hr(Carb-ONator)
1
hr(MilStop
SP)
OMRI-listed. Do not store unused spray solution.
See labels for additional labeled diseases and
instructions.
Carb-O-Nator: Final spray solution should not be
below pH 7.0. Some tank-mixes may be incompatible
and may cause phytotoxicity. Spray solution should
be applied within 12 hours of preparation.
MilStop: Do not exceed 0.5 lb of product per 4,350
sq ft or 1.15 lb of product per 10,000 sq ft per application.
Do not adjust pH after mixing. Do not mix with
other soluble pesticide or fertilizers not compatible
with mild alkaline solutions.
Damping off and root rots
(Phytophthora spp., Pythium
spp.)
propamocarb
hydrochloride
(Previcur Flex)
Anthracnose (Colletotrichum
spp.), black mold (A. alternata),
Botrytis gray mold (B. cinerea),
early blight (A. linariae 2
spot (C. cassiicola)
), target
pyraclostrobin +
boscalid
(Pageant
Intrinsic)
28
See label
See
label
0.5
Product applied through a drip system or as a soil
drench. Do not apply more than four applications of
product after transplanting per crop cycle. Do not
mix with other products. Phytotoxicity may occur
if applied to dry growing media. See label for other
application instructions and maximum use rates.
11+7
12.25 to 23 oz/acre
(all other diseases)
18 oz/acre
(target spot)
23 oz/acre
(Botrytis)
Gray mold (B. cinerea), early
blight (A. linariae 2
)
pyrimethanil
(Scala SC)
9
7 fl oz/acre
1
0.5
Use only in well-ventilated plastic tunnel or glass
houses; ventilate for at least 2 hours after application
of product. Use only in a tank mix with another
fungicide for early blight. Do not exceed 35 fl oz per
acre per crop, with a maximum of two crop cycles per
year. See label for cautions.
Powdery mildew (Leveilula and
Oidium spp.)
pyriofenone
(Prolivo 300 SC)
50
4 to 5 fl oz/acre
4 hr
Not prohibited for greenhouse use. Do not make
more than two sequential applications of Prolivo or
another Group 50-containing fungicide before rotating
to a fungicide with a different mode of action. Do
not apply more than 16 fl oz of product or 0.32 lb of
pyriofenone per acre per year. Do not apply more
than four applications per year.
Powdery mildew
sulfur (various) M02
See label
See
label
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.
1
2
Products registered for field use may be used on greenhouse crops (but not transplants) unless excluded on the label. Always check the label before applying a
product. Additional products not prohibited for greenhouse use on basil, cucurbits, and lettuce not listed in this table are available.
Former names of diseases and pathogens listed in this table that may be still be listed on fungicide labels are as follows: Acidovorax citrulli (formerly Acidovorax
avenae subsp. citrulli) Alternaria linariae (formerly A. solani and A. tomatophila); Athelia rolfsii (formerly Sclerotium rolfsii); Golovinomyces spp. (formerly
Erysiphe spp.) or Golovinomyces cichoracearum (formerly Erysiphe cichoracearum); Fulvia fulva (formerly Cladosporium fulvum and Passalora fulva); Boeremia
exigua (formerly Phoma exigua); Plectosphaerella cucumerina (formerly Plectosporium tabacinum); Podosphaera xanthii (formerly Sphaerotheca fuliginea);
Stagonosporopsis spp. (formerly Didymella); Xanthomonas leaf spot (formerly bacterial leaf spot); and (Xanthomonas cucurbitae (formerly X. campestris pv.
cucurbitae).
0.5
Do not make more than one application of product
before switching to a fungicide with a different
mode of action. Do not exceed 69 oz of product per
acre per crop cycle. Do not make more than three
applications of product or of other FRAC Group 7 or
11 fungicides per crop cycle. Do not tank mix with
adjuvants or other agricultural products.
Product 1
polyoxin D zinc
salt
(OSO 5% SC)
FRAC
Rate of Material
TOMATO -AFTER TRANSPLANTING IN A GREENHOUSE (cont'd)
19
6.5 to 13.0 fl oz/acre
Reentry
4 hr
Method, Schedule, and Remarks
Not prohibited for greenhouse use. Check products
labels for maximum limits of active ingredient
and applications per season.
2023 Vegetable Crop Handbook for Southeastern United States
309
Southeastern U.S. Vegetable Crop Handbook - 2023

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