Southeastern U.S. Vegetable Crop Handbook - 2022 - 299

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
Crop/Disease
Anthracnose (Colletotrichum
spp.), gummy stem blight
(Stagonosporopsis spp.2
),
powdery mildew (Golovinomyces
2
and Podosphaera
2
), target spot (Corynespora),
Powdery mildew
Suppression:
Downy mildew
Plectosporium blight (P.
tabacinum), powdery
mildew (P. xanthii 2
)
, G.
cichoracearum 2
Suppression:
Downy mildew (P. cubensis)
Powdery mildew
triflumizole
(Procure 480SC,
Terraguard SC)
3
3.8 fl oz/acre
(downy mildew)
4 to 8 fl oz/acre
(Procure)
2 to 4 fl oz/100 gal
(Terraguard)
(Procure)
1
(Terra
-guard)
0.5
tolfenpyrad
(Torac)
trifloxystrobin
(Flint Extra)
39
21.0 fl oz/acre
1
0.5
Not prohibited for greenhouse use. 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.
11
2.0 to 3.8 fl oz/acre
7
0.5
Not prohibited for greenhouse use. Alternate every FRAC 11
fungicide application with at least one application of a fungicide
from a different FRAC group to reduce the potential for resistance.
Do not exceed four applications or 15.2 fl oz of product per acre
per year. The minimum interval between applications is 7 days.
**Resistance in P. cubensis (downy mildew) is widespread.**
Procure: Not prohibited for greenhouse use. Do not exceed
24 fl oz of product per crop per year. If applying to a crop grown
from seed, do not exceed four applications per crop per year at
the 4 to 6 oz/acre rate or three applications per crop per year at
the 8 oz/acre rate. If applying to a transplanted crop, do not apply
more than three applications of product per crop per year. Label
specifies the following powdery mildew species:
G. cichoracearum 2
, P. xanthii).
Terraguard SC: For use only as a foliar spray. For use in commercial
greenhouse production only. Can be used on greenhouse
transplants. Do not exceed 16 fl oz of product per acre per
cropping system. See label for additional application instructions.
Do not exceed four applications per crop. Do not exceed two
applications per crop when applying to transplants.
EGGPLANT AND PEPPER - TRANSPLANT PRODUCTION
Anthracnose (Colletotrichum
spp.), Cercospora leaf
spot (C. capsici), gray leaf
spot (Stemphylium solani),
powdery mildew (Oidiopsis
sicula), Rhizoctonia stem rot
(R. solani)
Suppression:
Southern blight
(Athelia rolfsii 2
Azoxystrobin +
benzovindiflupyr
(Mural)
11+7 0.6 to 0.8 oz/5,000
sq ft
-
0.5
Allowed for use on transplants grown for resale to consumers.
Do not exceed two applications of product per crop. See label
for restrictions for product use when multiple crops are grown in
the same area. Do not apply more than two consecutive applications
of product before alternating to another fungicide from a
different FRAC group.
Product 1
thiophanate-methyl
(various)
FRAC
Rate of Material
CUCURBITS - AFTER TRANSPLANTING IN A GREENHOUSE (CONT'D)
See label
1
Minimum Days
Harv.
See
label
Reentry
Method, Schedule, and Remarks
See label Not prohibited for greenhouse use. See product labels for complete
application instructions, specific crop and disease labels,
and greenhouse usage. Check state registration status prior to
use. **Resistance in Stagonosporopsis 2
is widespread.**
(gummy stem blight)
)
Gray mold (Botrytis cinerea)
fenhexamid
(Decree 50
WDG)
Botrytis rot (Botrytis spp.),
early blight (A. linariae 2
),
powdery mildew
(L. taurica, O. sipula)
Suppression:
Anthracnose (C. coccodes)
1
2
polyoxin D zinc
salt
(Affirm WDG)
17
1.5 lb/acre
(stand-alone)
1.0 to 1.5 lb/acre
(tank-mix)
19
6.2 oz/acre
-
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. 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.
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 and labeled
diseases.
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).
2022 Vegetable Crop Handbook for Southeastern United States
299
Southeastern U.S. Vegetable Crop Handbook - 2022

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