Southeastern U.S. Vegetable Crop Handbook - 2023 - 304

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
Product 1
fenhexamid
(Decree 50
WDG)
FRAC
TOMATO - TRANSPLANT PRODUCTION (cont'd)
Gray mold (Botrytis cinerea)
17
Rate of Material
1.5 lb/acre
(stand-alone)
1.0 to 1.5 lb/acre
(tank-mix)
Late blight (Phytophthora
infestans)
mandipropamid
(Micora)
40
5.5 to 8.0 fl oz/acre
(0.65 to 0.9 fl
oz/5,000 sq ft)
-
4 hr
-
Reentry
0.5
Method, Schedule, and Remarks
Do not make more than two consecutive applications.
See label for additional tank-mixing instructions. Do
not exceed 6.0 lb product per acre per crop cycle to
transplants. Do not exceed six applications per acre
per crop cycle at the lowest use rate or four applications
per acre per crop cycle at the highest use rate.
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)
Damping off and root rots
(Phytophthora spp., Pythium
spp.)
propamocarb
hydrochloride
(Previcur Flex)
28
See label
-
0.5
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 active
ingredient and applications per season. See product
labels for additional application instructions.
For pre-seeding and/or seedling treatment
(before transplanting). Do not apply more than
two pre-seeding and/or seedling applications per
cropping cycle. Do not mix with other products.
See label for specific use directions and maximum
use rates. Phytotoxicity may occur if applied to dry
growing media.
Crown and basal rot (Fusarium
spp., Rhizoctonia solani,
Sclerotinia spp.), damping-off
(Pythium spp., Rhizoctonia spp.),
spots and blights (Alternaria
spp., Cercospora spp.,
Phoma spp., Septoria spp.),
Phytophthora blight
(Phytophthora spp.), powdery
mildew (Leveilula spp. and
Oidiopsis spp.), rots and blights
(Botrytis spp.)
Labels may include: Bacterial
canker, speck, and/ or spot
pyraclostrobin
+ boscalid
(Pageant Intrinsic)
11+7
See
label
-
0.5
For transplant production for the home consumer
market; not for use on transplants intended for
agricultural production fields. Do not tank-mix
with adjuvants or other agricultural products. Do not
apply more than two consecutive applications in any
crop production cycle or more than three applications
to any crop during a growing cycle. Do not apply to
consecutive transplant crops within the same production
structure. Do not exceed 118 oz product per
year to the same production crop. Product application
rates vary depending on target disease. See label
for application rates and additional restrictions and
instructions.
Streptomycin
sulfate
(Agri-Mycin 50,
Firewall 17 WP,
Firewall 50 WP,
Harbour)
Powdery mildew
triflumizole
(Terraguard SC)
3
2 to 4 fl oz/100 gal
-
0.5
25
See labels
-
0.5
See labels for restrictions, cautions, application
instructions, and labeled diseases for each product.
Not all products are registered for use in all
states. Check state registration status prior to
use.
Commercial greenhouse production only. Use only
as a foliar spray. Can be used on greenhouse transplants.
Do not exceed 16 fl oz of product per acre
per cropping system. Do not exceed 4 applications
per crop.
TOMATO - AFTER TRANSPLANTING IN A GREENHOUSE
P01
Bacterial speck (Pseudomonas
syringae pv. tomato), bacterial
spot (Xanthomonas spp.)
acibenzolar-S-methyl
(Actigard
50
WG)
1
2
0.33 to 0.75 oz/acre
14
0.5
Not prohibited for greenhouse use. Product should
be applied to healthy, actively growing plants. Product
should not be applied to stressed plants. Do not
apply on intervals less than 7 days. Do not exceed 6
oz of product per acre per year. See label for other
instructions, restrictions, and precautions.
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).
304
2023 Vegetable Crop Handbook for Southeastern United States
Southeastern U.S. Vegetable Crop Handbook - 2023

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