Southeastern U.S. Vegetable Crop Handbook - 2022 - 295

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
Alternaria leaf blight (Alternaria
cucumerina), Alternaria
leaf spot (A. alternata),
anthracnose (Colletotrichum
orbiculare), Cercospora leaf
spot (C. citrullina), downy
mildew (Pseudoperonospora
cubensis), gummy stem
blight (Stagonosporopsis
spp. 2
), Myrothecium canker
(Paramyrothecium roridum
2
), Phyllosticta leaf
); Phoma blight (Boeremia
exigua 2
spot (P. cucurbitacearum),
Plectosporium blight (Plectosphaerella
cucumerina 2
powdery mildew (Podosphaera
xanthii 2
, Golovinomyces
cichoracearum
2
), Septoria leaf blight (S.
cucurbitacearum)
Gray mold (Botrytis cinerea)
fenhexamid
(Decree 50
WDG)
Corynespora leaf spot
(Corynespora cassiicola),
early blight (Alternaria sp.),
gray mold (Botrytis), gummy
stem blight (Stagonosporopsis
spp.2
(Podosphaera sp.2
(Cladosporium sp.)
), powdery mildew
), scab
CUCURBITS - AFTER TRANSPLANTING IN A GREENHOUSE
11+3
azoxystrobin
+ difenoconazole
(Quadris Top)
Alternaria leaf blight (A. cucumerina),
Alternaria leaf spot
(A. alternata), anthracnose
(C. orbiculare), Cercospora
leaf spot (C. citrullina), downy
mildew (P. cubensis), gummy
stem blight (Stagonosporopsis
spp.2
exigua 2
), Phoma blight (P.
), Phyllosticta leaf
spot (P. cucurbitacearum),
Plectosporium blight (P. cucumerina
2
(P. xanthii 2
2
), Septoria leaf blight (S.
cucurbitacearum)
Labels may include: Alternaria
leaf spot, angular leaf spot,
anthracnose, bacterial fruit
blotch (suppression), downy
mildew, gray mold, gummy
stem blight, powdery mildew,
scab, Ulocladium leaf spot
1
2
copper, fixed
(various)
M01
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.
), powdery mildew
G. cichoracearum
12 to 14 fl oz/acre
1
0.5
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
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.
-
0.5
Labeled for cucumbers ONLY. Do not make more than two
consecutive applications. See label for tank-mixing instructions.
Do not exceed 6.0 lb product per acre to transplants,
),
Product 1
CUCURBITS -TRANSPLANTS PRODUCTION
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 one application of a FRAC
11-containing fungicide before alternating to another fungicide
with a different mode of action.
FRAC Rate of Material
Minimum Days
Harv.
Reentry
Method, Schedule, and Remarks
Not prohibited for greenhouse use. Do not use for transplant
production Make no more than one application of a QoI-containing
fungicide (FRAC Group 11) before alternating to another
fungicide with a different mode of action. Do not exceed 56 fl oz of
product per acre per year. See label for application limits of active
ingredients. The addition of a spreading/penetrating type adjuvant
is recommended. See label for additional instructions.
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
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Southeastern U.S. Vegetable Crop Handbook - 2022

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