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 & 12
14 12 hr Do not make more than 2 sequential applications
without rotating to different mode of action. No
more than 2 applications at max. rate.
9 & 12 Switch 62.5WG 14 oz 56 oz 0 0.5 Alternate with fungicide with dissimilar modes of
action after 2 applications.
12 Cannonball WG
7 oz 28 oz 0 0.5 Alternate with fungicides of dissimilar modes of
action.
Powdery mildew 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
M-45, Dithane F45 Rainshield,
Fortuna 75WDG, Koverall,
Mankocide, Manzate Flowable,
Manzate Pro-stick, Penncozeb
75 DF, Penncozeb 80 WP, Roper
DF Rainshield
3 Procure 480SC 0 0.5
3 Rally 40WSP 5 oz 20 oz 3 1 Supplemental label.
(myclobutanil)
3 Sonoma 40WSP 5 oz 20 oz 3 1
(myclobutanil)
3 Trionic
0 0.5 No more than 2 applications per season.
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 3 0.5 Alternate with fungicide with dissimilar modes of
(pentiopyrad) action after 2 applications.
7 &11 Merivon Xemium 33 1 0.5 Alternate with fungicides with dissimilar modes
of action.
7 & 11 Luna Sensation
0 0.5 Alternate with fungicides of dissimilar modes of
action.
7 & 12
14 12 hr Do not make more than 2 sequential applications
without rotating to different mode of action. No
more than 2 applications at max. rate.
9 & 12 Switch 62.5WG 14 oz 56 oz 0 0.5 Alternate with fungicide with dissimilar modes of
action after 2 applications.
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.
Equation SC, Quadris, Satori,
Tetraban, Willowood Azoxy
13 Quintec 1 0.5 Alternate with fungicides with dissimilar modes
(quinoxyfen) of action.
Pythium damping off 4 Sebring
100 lb of
seed
1 Seed treatment only.
(metalaxyl)
4 Ridomil Gold SL
Pythium seedling blight 4 Acquire, Allegiance FL
100 lb
seed
1 Seed treatment only.
(metalaxyl)
136 2019 Vegetable Production Handbook of Florida