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.
4 Ridomil Gold SL 0.25 pt 1.0 pt 7 2 Must be applied in a tank-mixture with full rate of
(mefenoxam) another downy mildew registered product.
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, Tetraban,
Willowood Azoxy
11 Reason 2 0.5 Alternate with fungicides with dissimilar modes
(fenamidone) of action.
15 Acrobat 50WP 6.4 oz 32 oz 0 0.5
(dimethomorph)
15 Forum 0 0.5 Must be applied as a tank-mix with a fungicide of
(dimethomorph) dissimilar mode of action.
21 Ranman SC 0 0.5 Alternate with fungicides with dissimilar modes
(cyazofamid) of action.
21 Actigard 50WG 1 oz 4 oz 7 0.5
Apply preventatively. See label for details.
(acibenzolar)
(Suppression only) 21A Torac (tolfenpyrad) 14 0.5 Also an insecticide.
27 Curzate 5 oz 30 oz 3 0.5 Must be applied as a tank-mix with a fungicide of
(cymoxanil) dissimilar mode of action.
27 & 11 Tanos 8 oz 24 oz 3 0.5
(cymoxanil + famoxadone)
28 Previcur Flex 2 pt 8 pt 2 0.5
(propamocarb)
28 Promess 2 pt 8 pt 2 0.5
(propamocarb)
33 Aliette WDG 5 lb 35 lb 3 0.5 Caution should be used when applying in
a management program including copper
fungicides.
(fosetyl Al)
33 Legion 80WDG 5 lb 20 lb 3 0.5 Caution should be used when applying in
a management program including copper
(fosetyl-Al) fungicides.
33 Linebacker WDG 5 lb 20 lb 3 0.5 Caution should be used when applying in
a management program including copper
(fosetyl-Al) fungicides.
33 (mono- and di-potassium salts 3 qt 0 4 hr See label for details.
of phosphorous acid)
Many brands available:
Fungi-phite, K-Phite 7LP,
Oxiphos, Phiticide, Phostrol,
Prophyt, Rampart
40 Forum 0 0.5 Do not apply alone in sequential applications.
(dimethomorph)
40 Revus 250SC 1 0.5 Do not exceed 2 sequential applications. See
(mandipropamid) label for soil applications.
43 Presidio 2 0.5 Must be tank-mixed with a fungicide of different
mode of action. Do not exceed two sequential
applications. See label for soil applications.
45 & 40 Zampro SC 0 0.5
(ametoctradin + dimethomorph)
Gray mold 7 & 11 Luna Sensation
0 0.5 Alternate with fungicides of dissimilar modes of
action.
2019 Vegetable Production Handbook of Florida 135