Table 14.4. Potato fungicides ordered by disease and then FRAC group according to their mode of action. (continued)
Pertinent Diseases
Fungicide
or Pathogens
Group1
Chemical
(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.
Late blight M1 (copper compounds) SEE INDIVIDUAL
LABELS
Varies by
product
from 0 to
1 day
Varies
by
product
from 4
hr to 2
days
(Phytophthora
infestans)
Many brands available: Americop 40DF,
Badge SC, Badge X2, Basic Copper
53, COC DF, COC WP, COCS WDG,
Champ DP Dry Prill, Champ 2 FL, Champ
MZ Disperss, Copper sulfate crystals,
Copper-Z 4/4, , Cueva, Kentan DF,
Kocide 2000, Kocide DF, Kocide 3000,
Nordox 75WG, Nu Cop 50WP, Nu-Cop
3L, Nu-Cop 50DF, Nu-Cop HB, Quimag
Copper Sulfate Crystal
M1 & M3 ManKocide 61.1DF
(copper hydroxide + mancozeb)
5 lb 74.66 lb 3 2
M3 (mancozeb) SEE INDIVIDUAL
LABELS
3 1 Limit is 11.2 lb of active ingredient per a
Many brands available: crop.
Dithane M45, Dithane DF Rainshield,
Dithane F45 Rainshield,Fortuna 75WDG,
Koverall, Mancozeb Flowable, Manzate
Pro-Stick, Nubark Mancozeb, Penncozeb
4FL, Penncozeb 80WP, Penncozeb 75DF,
Roper DF Rainshield
M3 Polyram 80DF 2 lb 14 lb 3 1 Limit is 7 appl./season
(metiram)
M3 & M5 Elixir
(mancozeb; chlorothalonil)
2 lb 18 lb 7 24 hr
M5 (chlorothalonil) SEE INDIVIDUAL
LABELS
7 0.5 Read label for application directions
Many brands available:
Bravo Ultrex, Bravo ZN, Bravo Weather
Stik 6L, Chloronil 720, Chlorothalonil
720SC, Echo 90DF, Echo 720, Echo ZN,
Equus DF, Equus 500 ZN, Equus 720SST,
Initiate 720, Initate ZN, Orondis Opti B
4 & M1 Ridomil Gold Copper 64.8W SEE INDIVIDUAL
LABELS
14 2 Limit is 3 appl./crop of this product & other
Ridomil products Add protectant fungicide,
see label. Also for storage rots (Pythium leak
Pink Rot)
(mefenoxam + copper hydroxide)
4 & M3 Ridomil Gold MZ 2.5 lb See label 3 2 Also labeled for storage rots (Pink Rot and
(mancozeb + mefenoxam) Leak)
4 & M5 Ridomil Gold Bravo SC 2.5 pt See label 14 2 Limit is 4 appl./crop. Also labeled for storage
(chlorothalonil + mefenoxam) rots (Pink Rot and Leak)
7 & 11 Priaxor 24 7 0.5 Do not make more than 2 sequential
applications
11 Evito 480SC, Aftershock 7 0.5 Limit is 6 application per crop and alternate
with non-group 11 chemistry
11 Gem 500SC , Flint Extra 7 0.5 Limit is 6 application per crop and alternate
(trifoxystrobin) with non-group 11 chemistry
11 Headline 3 0.5 Alternate with non-group 11 chemistry
(pyraclostrobin) between applications.
11 Reason 500SC 14 0.5 Alternate with non-group 11 chemistry
(fenamidone) between applications
11 Quadris, Aframe, Azoxystar, Azoxyzone,
Equation, Satoria, Willowood Azoxy
See
individual
labels
Alternate with non-group 11 chemistry
between applications. See label for
(azoxystrobin) soilborne disease applications
11 & M3 Cabrio plus 2.9 lb 17.4 lb 3 1 Do not make more than two sequential
(pyraclostrobin & metiram) applications
11 & M5 Quadris Opti 1.6 pt See label 14 0.5 Alternate with non-group 11 chemistry
(azoxystrobin + chlorothalonil) between applications
270 2019 Vegetable Production Handbook of Florida