Table 9.11. Spinach 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 Metastar 2E AG 8 pt 2 Apply as a broadcast soil application and
incorporate into top 2 inches. See label for
directions.
(metalaxyl)
Pythium seedling
diseases
4 Ridomil Gold SL
(mefenoxam)
2 pts 2 Apply at seeding in a 7-12” band on soil over
seed furrow
4 Ridomil Gold GR 40 lb 2
(mefenoxam)
4 Ultra Flourish 4 pt 2
incorporated applications and surface
applications at the time of planting.
(mefenoxam)
4 & 11 Uniform (azoxystrobin +
mefenoxam)
1000’ row
0 Make only 1 application per season at
planting.
Powdery Mildew 7 Fontelis 3 0.5 Do not make more than 2
(penthiopyrad) sequential applications.
9 & 12 Switch 62.5WDG 14 oz 56 oz 7 0.5 See label for details.
19 OSO 5%SC 0 4 hr See label for details.
(polyoxin D zinc salt)
21A Torac
(tolfenpyrad)
1 0.5 2 applications allowed per crop cycle.
Insecticide also controls aphids, thrips, etc.
Stemphylium leaf spot 7 & 12 Miravis Prime
14 12 hr No more than 2 sequential applications
without moving to dissimilar mode 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,
Willowood Azoxy
Various seedling
diseases
12 Maxim 4FS 0.5 Seed treatment only.
100 lbs of
seed
21 Actigard 50WG 0.75 oz 2.25 oz 7 0.5 Do not apply to young seedlings.
(acibenzolar)
1 FRAC code (fungicide group): Number (1 through 46) and letters (U and P) are used to distinguish the fungicide mode of action groups. All fungicides within the same
group (with same number or letter) indicate same active ingredient or similar mode of action. This information must be considered for the fungicide resistance management
FRAC Code List 2019; http://www.frac.info/ (FRAC = Fungicide Resistance Action Committee).
2 Information provided in this table applies only to Florida. Be sure to read a current product label before applying any chemical. The use of brand names and any mention or
listing of commercial products or services in the publication does not imply endorsement by UF/IFAS Extension nor discrimination against similar products or services not
mentioned.
142 2019 Vegetable Production Handbook of Florida
/