Table 12.6. Onion 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.
11 & 7 Pristine 18.5 oz 111 oz 7 0.5 Do not make more than 2 consecutive
(pyraclostrobin + boscalid) applications. No more than 6 appl/ crop.
9 & 12 Switch 62.5WG 14 oz 56 oz 7 0.5 Do not make more than 2 consecutive appl.
Do not plant crops not on the label for 30 days
after last appl.
22 & M5 Zing
(zoxamide + chlorothanil)
7.5 qt 7 0.5 Do not make more than 8 applications per
year.
27 & 11 Tanos 8 oz 84 oz 3 0.5
(cymoxanil + famoxadone)
29 Omega 500 F 1 pt 6 pt 7 2
(Suppression only) 33 Aliette WDG, 3 lb 7 appl. See label See label Do not tank mix with copper fungicides,
Linebacker WDG adjuvants or foliar fertilizers
(fosetyl-Al)
U15 & M5 Orondis Opti
(oxathiapiprolin + chlorothalonil)
2.5 pt 10 pt 7 0.5 Do not make more than 2 sequential
applications and do not exceed more than 33%
of all fungicide applications with Orondis.
Pythium Damping-off 4 (metalaxyl)
Many brands available: Allegiance,
Aquire, MetaStar 2E AG, Sebring 2.65
ST, Sebring 318 FS, Sebring 480 FS
4 (mefenoxam) SEE INDIVIDUAL
LABEL
N/A 2
Many brands available: Apron XL,
Ridomil Gold EC, Ridomil Gold SL,
Ultra Flourish
11 & 4 Uniform See label
(azoxystrobin + mefenoxam)
Rhizoctonia Damping
off
11 Dynasty
oz/100 lb
seed
See label See label 4 hr Seed treatment only.
(azoxystrobin)
11 Quadris
(azoxystrobin)
11 & 4 Uniform See label
(azoxystrobin + mefenoxam)
Rust 3 (tebuconazole) SEE INDIVIDUAL
LABEL
7 0.5
(Puccinia allii) Many brands available:
Monsoon, Onset 3.6L, Orius 3.6 F,
Tebu-Crop 3.6F, Tebustar 3.6 L, Tebuzol
3.6F, Toledo
3 & M5 Muscle ADV
(tebuconazole + chlorothalonil)
1.6 pt 3.2 pt 7 0.5 Apply in a protective fungicide schedule.
11 Quadris, See label See label 4 hr Alternate applications with a different fungicide
(azoxystrobin) group.
11 Cabrio EG 12 oz 72 oz 7 0.5 Alternate applications with a different fungicide
(pyraclostrobin) group. Make no more than 5 appl/crop.
11 & 3 Quilt Xcel
azoxystrobin + propiconazole) group 11 fungicide.
oz (green)
14 (dry
bulb); 0
(green)
0.5 Make only 1 appl. before alternating to a non(
9 & 3 Inspire Super See label 14
(cyprodinil + difenoconazole) alternate with a different fungicide group.
(green);
7 (dry
bulb)
0.5 Do not make more than 2 applications before
Seedling blight M3 (mancozeb) SEE INDIVIDUAL
LABEL
7 1 Do not apply to exposed bulbs
Many brands available:
Dithane DF, Dithane F45, Dithane M45,
Koverall, Manzate, Manzate Pro-Stik,
Penncozeb 4FL, Penncozeb 75DF,
Penncozeb 80WP, Roper DF
220 2019 Vegetable Production Handbook of Florida