Table 9.10. Lettuce fungicides ordered by disease and then FRAC group according to their mode of action. (continued)
Pertinent Diseases
Fungicide
Chemical
or Pathogens
Group1
(active ingredients)
Max. Rate/Acre Min. Days to
Applic. Season Harvest Reentry Remarks2
Labels change frequently. Be sure to read a current product label before applying any chemical.
7 Fontelis 1.67 SC 3 0.5 Alternate with fungicide with dissimilar modes of
(penthiopyrad) action after 2 applications.
7 &11 Merivon Xemium 11 33 1 0.5 Alternate with fungicides with dissimilar modes
of action.
12 Cannonball WG
7 oz 28 oz 0 0.5 Alternate with fungicides of dissimilar modes of
action.
14 Botran 5F 5.33 lb 5.33 lb 14 0.5
(dichloran)
Cercospora leaf spot 3 Rhyme
7 0.5 No more than 4 applications per season.
3 & 11 Topguard EQ
7 0.5 No more than 4 applications per season.
7 Fontelis 1.67SC 3 0.5
(penthiopyrad)
11 Cabrio EG 16 oz 64 oz 0 0.5 Alternate with fungicides with dissimilar modes
(pyraclostrobin) of action.
11 (azoxystrobin) 2.88 qt 0 4 hr Alternate with fungicides of
Various brands available: dissimilar modes of action.
Quadris, Satori, Willowood Azoxy
7 &11 Merivon Xemium 11 33 1 0.5 Alternate with fungicides with dissimilar modes
of action.
12 Cannonball WG 0.5 oz 1.5 lb 14 0.5
Damping off M3 5.3 oz/
100 lbs of
seed
1 Seed treatment only.
(thiram)
Downy mildew M1 (copper compounds) SEE INDIVIDUAL
LABELS
1 Varies by
product
from 4 hr
to 2 days
Many brands available: Basic
Copper 53, C-O-C-S WDG,
Champ DP, Champ WG, Champ
Formula 2, Champ WP, Cueva,
Kocide 3000, Nordox 75 WG,
Nu-Cop 50WP, Nu-Cop 3L,
Nu-Cop HB, Nu-Cop DF, Stretch,
Tenn Cop, Top Cop w/ Sulfur
M2 (sulfur) SEE INDIVIDUAL
LABELS
1 1 Do not apply during periods of warm weather.
Many brands available: Do not apply within 2 weeks of an oil spray.
Cosavet DF, Kumulus DF, Micro
Disperss, Sulfur 90W, That
Flowable, Thiolux, Top Cop w/
Sulfur
M3 (mancozeb) SEE INDIVIDUAL
LABELS
10 1
Many brands available: Dithane
M45, Dithane F45 Rainshield,
Fortuna 75WDG, Koverall,
Mankocide, Manzate Max,
Manzate Pro-stick, Penncozeb
75 DF, Penncozeb 80 WP, Roper
DF Rainshield,
U15 Orondis Ultra
(oxathiapiprolin)
0 4 hr Do not make foliar applications with Orondis
Ultra if Orondis Gold was applied using soil applications.
Do not make more than 2 sequential
applications and do not exceed more than 33%
of all fungicide applications with Orondis.
U15 & 4 Orondis Gold 200 + Orondis
Gold B (oxathiapiprolin +
mefenoxam)
2 pt 7 2 Do not make foliar applications with Orondis Ultra
if applied using soil applications. Be aware of
plantback restrictions.
134 2019 Vegetable Production Handbook of Florida